IBM PC Server 520 -- New 166MHz SMP Models and Feature Enhancements

June 18, 1996
Announcement Number: 196-134

Document's Table of Contents:


In Brief . . .

These servers give you great performance, power, and storage capacity with:

  • 166MHz or 133MHz Pentium processors with standard 512KB L2 cache, offering easy SMP upgrade capability

  • Network computing with PC Server 520 and Lotus Notes Version 4.1 Server -- lets your company excel in daily communications and decision making, locally or around the globe

  • Large-capacity (1.12GB, 2.25GB, 4.51GB), SCSI-2 Fast/Wide ultra-performance (7200 rpm), hot-swap hard drives driven from the PC ServeRAID SCSI Adapter for very high-performance RAID 0, 1, and 5

  • 64MB or 32MB of error correcting code (ECC)-on-SIMM system memory standard with up to 256MB of expansion capacity

  • Maxi-tower packaging with up to 22 devices supported by a 434W worldwide power supply and 220W modular power supply option, or an PC Server 780W Redundant Power Option

  • A LAN-ready model with high-bandwidth, four-port, Ethernet Quad PeerMaster PCI Server Adapter for multiple, high-performance, Ethernet segments

  • Two high-speed NS16550-compatible serial ports and one (2 MB/sec) parallel port supporting devices using ECP/EPP protocols adhering to the IEEE 1284 standard

  • Three-year, on-site limited warranty(4), PC HelpWare(R), TechConnect, and PC Server Start Up Support

New PC Server 520 systems bring you more power and function than ever before. These PC Server 520 models include Pentium 166MHz(1) or 133MHz(1) microprocessors; a greatly enhanced, technologically advanced, PC ServeRAID SCSI Adapter; a four-port Ethernet Quad PeerMaster Server Adapter; Lotus Notes Version 4.1 Server at no additional charge; and a newly designed swing-out door that combines convenience with security for accessing hot-swap hard drives.

These PC Server 520 models provide outstanding growth and scalability. They are designed to handle business enterprise applications that require solid processor performance, large amounts of memory, and data storage capacity not only for today's operations but for future growth. SMP-ready 166MHz Pentium processing power, 32MB or 64MB of ECC-on-SIMM memory with expansion up to 256MB, and 22 drive bays makes the PC Server 520 the solution you can count on to handle your enterprise LAN server requirements.

PC Server 520 Features at a Glance

            Pentium   ECC    SCSI-2 PCI
Description Processor Memory Adapter         Hard Drive

PCI/Micro Channel 8641-MD0 133MHz 32MB Fast/Wide Open bay PCI/EISA 8641-EE0 166MHz 64MB Fast/Wide Open bay 8641-EE1 166MHz 64MB Fast/Wide RAID Open bay 8641-EEE 166MHz 64MB Fast/Wide RAID 4 x 2.25GB(2) Fast/Wide 8641-EEL(3) 166MHz 64MB Fast/Wide RAID 6 x 2.25GB Fast/Wide

PC Server 520 systems contain a quad-speed CD-ROM, ServerGuide, and TME 10 NetFinity(TM) to facilitate server setup and make management of servers and clients on the network easier. These industry standard servers have been tested with numerous IBM and non-IBM adapters and devices through the IBM PC Server Compatibility Program. They are certified with several popular network operating systems for both uniprocessor and SMP.


  • Hardware Announcement 196-137, dated June 18, 1996, (IBM PC Servers with Lotus Notes -- No Additional Charge)
  • Hardware Announcement 196-132, dated June 18, 1996, (IBM PC Server Compatibility Program)
Planned Availability Dates: August 9, 1996, except for PC Server 520 (8641-EEL) and the Bulkhead Cable option, which will be available September 10, 1996
(1)   Internal microprocessor speed, application speed may be less
(2)   1GB equals 1000 million bytes, total user capacity may vary.
(3)   This model contains a four-port Ethernet Quad PeerMaster Server
(TM)  Trademark of International Business Machines Corporation in the
      United States or other countries or both.
(R)   Registered trademark of International Business Machines
      Corporation in the United States or other countries or both.
(4)   For information on IBM's statement of limited warranty, call
      800-772-2227.  Copies are available upon request.

Other trademarks and registered trademarks are the properties of their respective owners.


PC Server -- New Options

The PC ServeRAID SCSI Adapter (#1930, 70G8489) is a very high-performance, three-channel, PCI RAID adapter. This technologically advanced, RAID adapter supports up to 45 SCSI-2 fast/wide hard drives to satisfy mission-critical applications that require protection for large amounts of data. In addition, this state-of-the-art RAID adapter is designed to support Ultra SCSI hard drives, the next generation of drive technology just becoming available in the industry. When installed in PC Server 520 and 720 systems, this single adapter can support RAID levels 0, 1, and 5 disk arrays in all 18 hot-swap drive bays.

PC ServeRAID SCSI Adapter achieves outstanding performance through the use of a RISC processor, 4MB of cache, and a dual bus architecture with a local PCI bus. These attributes significantly improve system performance by reducing traffic on the system local bus and by rapidly processing complex RAID algorithms with the high-speed processor.

IBM incorporates Logical Drive Migration with the PC ServeRAID SCSI Adapter. This new technology allows changes to be made to the RAID configuration while the PC Server is up and running. Using online utilities, new RAID arrays can be added and RAID levels can be modified without deleting the original array or requiring the data to be restored from a backup source. In addition, the PC ServeRAID SCSI Adapter stores critical RAID configuration information in multiple locations on the adapter and hard disk, making disaster recovery or migrating hard drives from one server to another quick and easy. This means hard drives can now be removed from your server and installed in another server or IBM PC Server expansion tower -- in any order. The PC ServeRAID SCSI Adapter takes care of getting the configurations from the hard drives and remapping them as necessary.

This adapter contains three internal connectors, one for each channel and one external connector. Three of the four connectors can be used for attachment of SCSI devices. The PC ServeRAID SCSI Adapter can support multiple external SCSI devices through the use of new Internal Bulkhead Cable options. Installation publications, a DASD status cable, device drivers, and RAID utilities are included. The PC ServeRAID SCSI Adapter supports popular network operating systems such as OS/2(R), Windows+ NT, NetWare, and SCO. This adapter is supported in all PC Server 320, 520, and 720 models. In addition, the PC ServeRAID SCSI Adapter supports external enclosures such as the PC Server Enterprise Expansion Tower and the 3517 SCSI Multi-Storage Enclosure.

The Internal Bulkhead Cable (#2406, 76H2675) option is a single, 16-bit SCSI cable with bracket and screws that converts a PC ServeRAID SCSI Adapter internal connector to an external port for attachment of SCSI-2 fast/wide devices through the use of a Fast/Wide to Fast/Wide External SCSI Cable (70G9857). This option is designed to allow connection of external SCSI devices to either one or two of the internal connectors on the adapter installed in PC Server 320, 520, or 720 systems. The cable connects to an internal connector of the PC ServeRAID SCSI Adapter and can be routed to the PC Server rear panel cutouts. Customers should verify their PC Server model has a cutout available before ordering this option. A bulkhead cable option must be ordered for each connector-to-cutout installation.

The PC Server HS Backplane III (#2405, 76H2670) is a new backplane designed for the PC Server 520, which supersedes the PC Server HS Backplane III (#2302, 70G9855). This new backplane option must be used with these servers when additional backplanes are required for expansion.

The PC Server SMP 166MHz Upgrade (#2362, 94G6053) is a 166MHz Pentium microprocessor designed to be easily installed in the second ZIF socket of PC Server 320 and 520 models with standard 166MHz uni-microprocessors to support SMP operations. This option comes with installation instructions and a special heat sink designed for optimum reliability for IBM PC Server installations.

High-Performance Processor Subsystem

PC Server 520 systems are high-performance, enterprise, LAN-server solutions. All models incorporate powerful 166MHz or 133MHz Pentium processors with SMP upgrade capability, 512KB L2 write-back cache, and 64MB or 32MB of ECC-on-SIMM system memory.

  • The Pentium microprocessors handle internal operations at 166MHz or 133MHz clock speed, dependent on model, while external I/O bus transactions run at 66MHz.

  • 16KB internal cache is standard, 8KB is used for data and 8KB is used for instructions.

  • High-performance 512KB L2 write-back cache uses 15 ns memory.

  • The system board contains a second microprocessor ZIF socket that supports a second Pentium microprocessor for SMP operations.

  • Two 32MB or two 16MB, high-speed, ECC, 70 ns memory SIMMs are standard, with total system memory expandable to 256MB.
The PC Server 520 processor subsystem provides outstanding price/performance in compute-intensive operations, such as an entry database server, or to support a large number of clients for file server applications. The SMP capability extends processing performance by allowing tasks to be dispatched to the next available processor rather than being queued until the busy processor has completed its current task. SMP also benefits current software applications. If the applications are supported by an SMP network operating system, they generally take advantage of the added processor power without modification. In addition, SMP provides a level of high availability; for example, some operating systems, such as OS/2 SMP, run in a uniprocessor mode if one of the processors experiences failure. This function allows the LAN to resume operations so service can be scheduled during noncritical times.

Expandability Features

PC Server 520 is a maxi-tower mechanical package designed for efficient cooling, system security, and exceptional data storage scalability.

  • Twenty-two device bays are available for internal data storage of over 49GB. Large-capacity configurations can be achieved inside this mechanical package that supports up to 18 one-inch, hot-swap hard drives, plus a 4X CD-ROM, 1.44MB floppy diskette drive, and a full-high 5.25-inch bay for an optional 24/48GB internal tape backup.

  • PC Server 520 PCI/EISA models contain nine physical adapter slots, three PCI and six EISA, with one slot being shared. This allows configurations of either three PCI adapters and five EISA adapters or two PCI adapters and six EISA adapters (an IBM PC Server SCSI-2 Fast/Wide PCI Adapter or PC ServeRAID SCSI Adapter and ISA SVGA video adapter consume two slots, the Ethernet Quad PeerMaster PCI Server Adapter consumes another slot on LAN-ready models).

  • The PC Server 520 PCI/Micro Channel model contains eight adapter slots, two are PCI and six are Micro Channel (the PC ServeRAID SCSI Adapter takes one PCI slot).

  • Array models, which include the PC ServeRAID SCSI Adapter, support up to 45 fast/wide, hot-swap hard disks for RAID 0, 1, and 5 operations. Non-array models contain either an integrated SCSI-2 fast/wide controller or adapter that can support up to 15 SCSI-2 fast/wide devices.

  • A standard 434-watt power supply provides power to support entry system configurations, while a 220-watt modular power supply option is available for more robust hot-swap hard drive expansion into the two optional lower hot-swap drive banks. In addition, the PC Server 780W Redundant Power Option is offered to support mission-critical applications, dependent on server availability.
Data storage expansion of PC Server 520 is a key benefit to customers establishing a LAN. Installations must be capable of supporting not only the adapters and devices necessary for the number of clients being served today, but there must be room for growth as either the number of clients supported increases or the need for compute-intensive applications expands. Customers running SMP applications will find that the real advantage of adding a second processor only becomes evident when there are sufficient hard drives to quench the processor's thirst for data. The PC Server 520 provides a reliable platform with the flexibility to handle applications for today and expansion capacity for future growth.

High-Performance Disk Subsystems

PC Server 520 array models feature the PC ServeRAID SCSI Adapter designed specifically for disk fault tolerance for mission-critical LAN environments. Non-array, PCI/EISA models contain an IBM PC Server SCSI-2 Fast/Wide PCI Adapter, while the PCI/Micro Channel model contains this same function on the planar.

  • PC ServeRAID SCSI Adapter is a very high-performance, three-channel, PCI RAID adapter that supports up to 15 hard drives per channel with RAID levels 0, 1, and 5. It features an onboard RISC microprocessor to handle the complex RAID algorithms with blazing speed. It also contains a high-speed 4MB cache and a local PCI bus to further enhance performance. This adapter includes utilities for setup, display, and administration of disk arrays for NetWare 3.x and 4.x, OS/2, Windows NT, and SCO.

  • High-speed hard drive options provide extremely fast LAN server performance for PC Server 520 systems. These drives are available in fast/wide versions of 1.12GB, 2.25GB, or 4.51GB. With average seek times of 8.0 ms, these high-speed drives spin at 7200 rpm to provide state-of-the-art server performance.

  • When used with TME 10 NetFinity, IBM's high-speed drives provide Predictive Failure Analysis(TM) (PFA), which alerts the system administrator of an impending drive failure 24 to 48 hours before it happens. This feature allows data to be backed up and drives to be replaced with minimal disruption to business. For hard drives with this PFA feature covered by IBM warranty, IBM will replace the drive if the NetFinity PFA service detects a failure.
The disk subsystems available on the PC Server 520 models provide customers with a cost-effective means to increase productivity of their workgroups connected to this server. Each component and device of these subsystems is designed for the best possible performance achievable for a server of its class. These array models provide fault tolerance and high availability by protecting data in the event of a hard drive failure. The hot-swap capability allows a failed drive to be replaced "on the fly" without taking the server down to install a replacement drive. Data on the failed hard disk drive is simply rebuilt onto the new drive in the background while the server maintains service to the clients to avoid lost productivity.

Systems Management: All PC Server 520 systems feature TME 10 NetFinity, a comprehensive systems and asset management software tool using a graphical interface, which is contained on CD for installation convenience. NetFinity allows the LAN administrator to monitor and manage NetWare, Windows NT, and OS/2 LAN servers from either OS/2, Windows 3.1, or Windows 95 workstations.

  • This systems management software collects detailed hardware configuration information, such as model and processor, adapters installed on the PCI, EISA, or Micro Channel bus, and RAID subsystems.

  • Alert pager support allows managing systems with a modem to dial out to a pager when an alert is received. This ensures the LAN administrator can be informed of alerts as they occur.

  • An event scheduler service is included that can automatically start NetFinity services on one or more systems.

  • PFA alerts the system administrator of an impending hard drive failure, normally 24 to 48 hours before it occurs.
Because LANs are normally decentralized, management and control can be very costly. IBM recognizes the need to place computing power where it is really needed and provides products to help manage the LAN more efficiently. NetFinity helps give you total charge of your LAN and even warns you of an impending failure so it can be handled in a controlled and cost-effective manner.

The remote server management provided by NetFinity greatly improves the LAN administrator's productivity and remote LAN management capability. This saves money and time and contributes to lower network operating costs, less travel to remote sites, reduced downtime, and much better overall control through active monitoring, fault prevention, and faster problem resolution.

Start-Up Support/Ease of Use

The PC Server 520 comes with IBM's PC Server Start Up Support that provides additional HelpWare coverage during the first 90 days from installation on various devices and adapters from IBM and non-IBM vendors. Call the HelpCenter(R) at 800-772-2227 to take advantage of this offering.

PC Server 520 systems contain several features to assist users, resellers, and servicers. These features include:

  • A new swing-out, lockable front door that combines convenience with security for accessing hot-swap hard drives

  • A standard quad-speed CD-ROM drive for loading operating systems and applications

  • ServerGuide CD Library that provides utilities, drivers, and automated loading of popular network operating systems

  • Plug and play system BIOS support for easy installation of PCI and ISA adapters designed to this standard, or Micro Channel architecture that also allows for easy installation of adapters

  • Rotational PCI interrupts that allow PCI adapters to have independent interrupts for easier system configuration

  • Reusable carton and interlocking clips that allow configuration and setup while still in the packing tray -- this feature also protects the system for reshipments

  • A system service label attached to the inside system cover for assistance with configuration settings and other technical information

  • Built-in handle and roller for easy maneuvering

  • Hot-swap hard disk ready for simplified hard drive configurations
LANs can be complicated to install, service, and support. PC Server 520 systems are designed with many features to ease LAN management and reduce installation, service, and support costs.


The PC Server 520 system is an enterprise LAN server that combines industry standard technologies, very large data storage capacity, rugged dependability, ease of installation, and system management, plus excellent performance through its 166MHz or 133MHz Pentium SMP capability. Now these systems also contain Lotus Notes Version 4.1 Server, Single Processor Edition at no additional charge. This powerful combination of features provides a server of exceptional value and function. The new systems are available as array and non-array configurations. The array models are designed to meet the complex requirements of medium to large businesses requiring higher levels of server availability and fault tolerance for data storage. The non-array models are ideal in the same environments where fault tolerance of data through hardware-implemented RAID is not a requirement.

These new servers are positioned above the current PC Server 520 systems because of their higher microprocessor and RAID adapter performance. They are ideal solutions for complex and advanced interconnected LANs found in large and medium businesses running critical and noncritical business applications. The PC Server 520 array models using RAID 1 or 5, standard ECC-on-SIMM memory, large hot-swap data storage capacities, and an optionally available PC Server 780W Redundant Power Option offer a very cost-effective solution for mission-critical business environments.


The following publications, CDs, and diskettes are shipped with the PC Server 520. Additional copies of the system library are available separately. ServerGuide is available only with the purchase of an IBM Server.

  • PC Server 520 System Library (S78H-5400, 78H5400 for PCI/EISA models or S78H-6378, 78H6378 for the PCI/Micro Channel model) contains an introduction to the computer, installation and set up, installing options, reference information, and information on solving problems with your system.

  • ServerGuide contains a set of easy-to-use utilities that provides quick and convenient installation via CD of OS/2 Warp, OS/2 for SMP, NetWare 3.12 and 4.1, LAN Server 4.0 Entry and Advanced, Windows NT 3.51, and SCO Open Server 3.0. Also included is NetFinity system management software and a ServerGuide license diskette. ServerGuide versions, features, and functions may change as new releases become available.

  • PC Server 520 EISA Configuration Diskette (S78H-6409, 78H6409) contains licensed programs that include set EISA configuration, copy an option diskette, and update system programs (PCI/EISA models).

  • PC Server Diagnostic Diskette (S62H-6989, 62H6989) contains licensed programs that include test and system utilities (PCI/EISA models).

  • PC Server 520 System Diskettes (S76H-7620, 76H7620) contain licensed programs to set up and test Micro Channel adapters and system diagnostic utilities (PCI/Micro Channel model).

  • PC Server SVGA Support Diskette (S30H-2502, 30H2502) contains files to support extended video modes (PCI/EISA models).

  • IBM Video Support Diskettes (S30H-2443, 30H2443) contain files to support extended video modes (PCI/Micro Channel model).

  • PC Server SCSI-2 F/W PCI Support Package (S76H-7572, 76H7572) includes user's guides and licensed programs containing device drivers for OS/2, Novell NetWare, Windows, Windows NT, and SCO.

  • PC ServeRAID Support Package (S52H-3685, 52H3685) contains device drivers to support the PC ServeRAID SCSI Adapter with OS/2, Novell NetWare, Windows NT, and SCO. Easy-to-use utilities to show status of disk array configuration allow starting and building a replacement hard drive (array models).

  • PC Server Windows NT Support Diskette (S30H-2457, 30H2457) contains drivers to support dual processor operations with Windows NT (PCI/Micro Channel model).
The following publications are available. For current prices or to order, contact your IBM representative.
                                        Order          Part
Title                                   Number         Number

PC Server 520 System Library (PCI/EISA) S78H-5400 78H5400 PC Server 520 System Library (PCI/Micro Channel) S78H-6378 78H6378 PC Server Hardware Maintenance Manual Supplement S83H-9618 83H9618

System Library Subscription Service (SLSS) is available.


Automated Installation of Software

Your PC Server 520 comes with ServerGuide Version 2.51, or later. The ServerGuide package contains a license diskette and a library of compact discs. When you are ready to install your new IBM PC Server 520, place the first CD into the CD-ROM drive, insert the license diskette, and start your server. An easy-to-use graphical interface takes you through simple steps that allow you to install, configure, and tune the operating system of your choice.

OS/2 Warp with WIN-OS/2(TM), OS/2 for SMP, LAN Server 4.0 Entry, LAN Server 4.0 Advanced, Novell NetWare 3.12 and 4.1, Windows NT 3.51, and SCO Open Server 3.0 are all stored in encrypted form on ServerGuide CDs, ready to install. ServerGuide menus take you through a series of configuration choices after which you type in a unique activation key that can be purchased from your IBM authorized dealer or IBM representative to unlock the software for installation.

ServerGuide automatically detects and identifies your specific hardware configuration and fills in all configuration choices with sensible defaults, so you can simply accept ServerGuide's suggestions or change them to meet your requirements. Then, ServerGuide automatically installs the device drivers necessary for the application.

TME 10 NetFinity

TME 10 NetFinity is IBM's comprehensive systems management environment for your IBM Server. It provides an easy-to-use graphical set of local and remote services designed to make the IBM Server simple and affordable to manage.

ServerGuide includes the latest version of TME 10 NetFinity Version 4.0. TME 10 NetFinity offers many impressive new features. Refer to Software Announcement 296-183, dated May 28, 1996, for specific details.

TME 10 NetFinity installation can be carried out automatically via the ServerGuide graphical front end or direct from the CD when installed as part of an operating system installation.


Education for this product is provided in a combination of self-study and classroom courses. Customer technical and executive education will be updated to reflect these announcements.

A description of these self-study and classroom courses is contained in the IBM Education catalogs.

Call IBM Education and Training at 800-IBM-TEACH (426-8322) for education catalogs, schedules, enrollments, and orders for self-study courses.


Specified Operating Environment

Physical Specifications

PC Server 520 -- 133MHz, PCI / Micro Channel Model


Processor Pentium Internal Speed 133MHz External Speed 66MHz L2 Cache 512KB Memory (70 ns) 32MB ECC SIMMs 2 x 16MB SIMM Sockets 8 Video Control SVGA Memory 1MB SCSI-2 Controller Fast/Wide Channels 1 Ports Internal 2 Ports External 1 RAID Adapter None Channels 0 Ports Internal 0 Ports External 0 Fixed Disk (Fast/Wide) None Total Bays 22 5.25/3.5-inch Half High 3 3.5-inch Slim High 1 Hot-swap 18 Accessible 22 Internal Capacity 49.5GB Bays Available 20 5.25/3.5-inch Half High 2 3.5-inch Slim High 0 Hot-swap 18 Total Slots 8 PCI 2 Micro Channel 6 Slots Available 8 PCI 2 Micro Channel 6 Network Card None Ports 0 CD-ROM 4X Floppy Drive 1.44MB Power Supply 434W Auxiliary Power Option 220W or Redundant Power 780W

PC Server 520 -- 166MHz, PCI / EISA Models

8641-EE0 8641-EE1

Processor Pentium Pentium Internal Speed 166MHz 166MHz External Speed 66MHz 66MHz L2 Cache 512KB 512KB Memory (70 ns) 64MB ECC 64MB ECC SIMMs 2 x 32MB 2 x 32MB SIMM Sockets 8 8 Video Control SVGA SVGA Memory 1MB 1MB SCSI-2 Adapter Fast/Wide RAID Fast/Wide Channels 1 3 Ports Internal 2 3 Ports External 1 1 Fixed Disk (Fast/Wide) None None Total Bays 22 22 5.25/3.5-inch Half High 3 3 3.5-inch Slim High 1 1 Hot-swap 18 18 Accessible 22 22 Internal Capacity 49.5GB 49.5GB 8641-EE0 8641-EE1

Bays Available 20 20 5.25/3.5-inch Half High 2 2 3.5-inch Slim High 0 0 Hot-swap 18 18 Total Slots 8 8 PCI 2 2 EISA 5 5 PCI/EISA 1 1 Slots Available 6 6 PCI 1 1 EISA 4 4 PCI/EISA 1 1 Network Card None None Ports 0 0 CD-ROM 4X 4X Floppy Drive 1.44MB 1.44MB Power Supply 434W 434W Auxiliary Power Option 220W 220W or Redundant Power 780W 780W

PC Server 520 -- 166MHz, PCI / EISA Models

8641-EEE 8641-EEL

Processor Pentium Pentium Internal Speed 166MHz 166MHz External Speed 66MHz 66MHz L2 Cache 512KB 512KB Memory (70 ns) 64MB ECC 64MB ECC SIMMs 2 x 32MB 2 x 32MB SIMM Sockets 8 8 Video Control SVGA SVGA Memory 1MB 1MB SCSI-2 Adapter RAID RAID Fast/Wide Fast/Wide Channels 3 3 Ports Internal 3 3 Ports External 1 1 Fixed Disk (Fast/Wide) 4 x 2.25GB 6 x 2.25GB Total Bays 22 22 5.25/3.5-inch Half High 3 3 3.5-inch Slim High 1 1 Hot-swap 18 18 Accessible 22 22 Internal Capacity 49.5GB 49.5GB Bays Available 16 14 5.25/3.5-inch Half High 2 2 3.5-inch Slim High 0 0 Hot-swap 14 12 Total Slots 8 8 PCI 2 2 EISA 5 5 PCI/EISA 1 1 Slots Available 6 5 PCI 1 0 EISA 4 4 PCI/EISA 1 1 Network Card None PCI PeerMaster Ports 0 4 (Ethernet) CD-ROM 4X 4X Floppy Drive 1.44MB 1.44MB Power Supply 434W 434W Auxiliary Power Option 220W 220W or Redundant Power 780W 780W

Fixed Disk Drive Characteristics (2.25GB Hard Disk)

  • Formatted capacity: 2250 million bytes(5)
  • Average seek time: 8.0 ms
  • Burst transfer rate (maximum): 20.0 MB/s
  • Sustained transfer rate (maximum): 8.2 MB/s
  • Average latency: 4.17 ms
  • Drive rotation speed (rpm): 7200 rpm
  • Sector interleave: 1:1
(5)   Capacity before the installation of an operating system.  The
      total user accessible capacity may vary slightly based on
      operating system environments.

4X-Speed CD-ROM Drive Characteristics

  • Average access time: 200 ms
  • Average data transfer rate: 600 KB/s
  • Data burst (synchronous or asynchronous mode): 5 MB/s
  • Buffer size: 256KB
Video Subsystem
  • 1MB DRAM display memory
  • True color VGA GUI accelerator
  • Bit block transfer
  • 16-bit interface
  • Support for up to 24-bit per pixel color
  • Compatible with VGA color, analog monochrome monitors, and multiple frequency monitors
  • Integrated RAMDAC with 262,144 color palette
  • Extensive graphic mode support
  • SVGA operating mode information
Supported video mode capabilities for the SVGA adapter standard on the PC Server 520.


Resolution                                   Rate (Hz)

640 x 480 x 16 60, 72 640 x 480 x 256 60, 72 800 x 600 x 256 56, 60, 72 1024 x 768 x 256 87i, 60, 70, 72


  • OS/2 drivers that ship with the operating system package were used.

  • 87i denotes 87Hz interlaced.

  • Windows NT, NetWare, and SCO drivers are contained in the respective operating system packages.
  • Width: 353 mm (13.9 in)
  • Depth: 755 mm (29.7 in)
  • Height: 622 mm (24.5 in)
  • Weight (minimum ship configuration): 31.29 kg (69 lb)
  • 90 to 137 (nominal) V AC; 50 to 60Hz
  • 180 to 265 (nominal) V AC; 50 to 60Hz
  • Btu output (minimum): 150 Btu/hour (44W)
  • Btu output (maximum): 3,600 Btu/hour (1055W)
  • Noise level (average 1 meter position, typical machine, vertical floor-standing position): 5.6 Bels (idling)
Note: The noise emission level stated is the declared (upper limit) sound power level, in Bels, for a random sample of machines, typically configured, and operating in idle mode; that is, powered on, but no disk drive read/write or other I/O activity. All measurements made in accordance with ANSI S12.10 and ISO 7779, and reported in conformance with ISO 9296.

PC Server 520 systems are intended for use as floor-standing systems and are designed to operate in a vertical position only.

Standards: These systems comply with:

  • Multiprocessor Specification (MPS) 1.1

  • Peripheral Component Interconnect (PCI) specification 2.0
The PC Server 520 systems are hardware-enabled to meet the International Organization for Standardization (ISO) Standard 9241, Part 3.

Equipment Approvals and Safety

PC Server 520

  • FCC -- Certified to comply with Part 15 of the FCC Rules for a Class A digital device
  • UL, cUL
  • NOM
PC ServeRAID SCSI Adapter
  • FCC -- Certified to comply with Part 15 of the FCC Rules for a Class B digital device
Operating Environment
  • Temperature
    • 10.0(degs) to 35.0(degs)C (50(degs) to 95(degs)F) at 0 m to 914 m (0 ft to 3,000 ft)
    • 10.0(degs) to 32.0(degs)C (50(degs) to 90(degs)F) at 914 m to 2,134 m (3,000 ft to 7,000 ft)
  • Relative humidity: 8% to 80%

  • Maximum altitude: 2,133 m (7,000 ft)
Hardware Requirements: The PC Server 520 requires an analog display (IBM 4707, 8504, 6324, 6325, 6327, 9525, P50, P70, G40, G50, G70, or equivalent) for system setup and service.

The PC Server 520 with an integrated SVGA controller or adapter along with an ISO-compliant display, such as 95xx IBM Color Displays, P50, P70, G40, G50, and G70 Color Monitors, and either PC DOS 6.3, or later, or OS/2 2.11, or later, are designed to comply with the requirements specified in the ISO Standard 9241 Part 3.

Software Requirements: The following IBM operating systems/extensions support the PC Server 520:

  • OS/2 2.11 for SMP(6), OS/2 Warp 3.0, OS/2 Warp 3.0 with WIN-OS/2, OS/2 Warp Server 4, and OS/2 Warp Server Advanced 4

  • OS/2 LAN Server 4.0 Entry(6)

  • OS/2 LAN Server 4.0 Advanced(6)

  • PC DOS 6.3(7),(8) and 7(8)
The following vendor network operating systems are supported in the PC Server 520:
  • Novell -- NetWare 3.12, 4.1, and 4.1 SMP(6)

  • The Santa Cruz Operation, Inc., SCO Open DeskTop/Open Server 3.0(6),(9) (UOD383B, MPX 3.0, APIC EFS 1.0), Open Server 5.0(6), UnixWare 2.1(6),(9)

  • Microsoft+ -- Windows NT 3.51 Workstation(6) and Windows NT 3.51 Server(6)
(6)   These network operating systems and appropriate extensions
      support PC Server 520 models running dual processors.
(7)   PC DOS 6.x supports up to seven fixed disk devices and
      additional SCSI devices (up to a total of 24) in a system.
(8)   PC Server 520 systems using the PC ServeRAID SCSI Adapter
      support PC DOS only for loading NetWare.
(9)   PC Server 520 systems using the PC ServeRAID SCSI Adapter are
      not supported with these operating systems.

Compatibility: The PC Server 520 systems contain licensed system programs that include set configuration, set features, and test programs. Some of these system programs are stored in the system ROM, while others are contained on diskette. System BIOS is loaded from a "flash" EEPROM on the system board into system memory. This BIOS provides the hardware instructions and interfaces designed to support the standard features of the PC Server 520 and to maintain compatibility with many software programs currently operating under PC DOS and OS/2 on PC Servers. However, due to the higher speed of the processors in these models, some timing-sensitive software may require modification.

Detailed information relative to IBM and non-IBM devices, adapters, software, and network operating systems supported with PC Servers can be accessed via the World Wide Web at URL:
Also, customers can contact their IBM representative, authorized remarketer, PC HelpWare, or refer to the IBM Sales Manual for information on the compatibility of hardware and software for IBM PC Servers. The Sales Manual is updated periodically as new features and options are announced that support these servers.


  • PC Server 520 supports 32MB and 64MB ECC-on-SIMM memory kits. These kits contain two matched memory SIMMs, because all memory SIMMs must be of the same type and be installed in matched pairs. Refer to the Compatibility section of the Sales Manual or contact your IBM reseller or IBM representative for specific information on supported memory SIMMs.

  • High-performance BIOS on PC Server 520 PCI/EISA models uses 128KB of system memory; an additional 256KB is reserved for installing options that may require additional memory for BIOS shadowing. PC Server 520 PCI/Micro Channel models use 160KB of system memory; an additional 96KB is reserved for installing options that may require additional memory for BIOS shadowing.

  • PC Server 520 PCI/EISA models support full-length adapters in EISA slots one, two, and three, and PCI slots zero and one. The remaining EISA and PCI slots support half-length adapters.

  • PC Server 520 Micro Channel model supports a maximum of two Type 5 Micro Channel adapters per system. The IBM Ethernet Quad PeerMaster Server Adapter is a Type 5 adapter.

  • Because these systems are designed as industry standard servers using an industry standard diskette drive interface, the location of the media eject button on the industry standard diskette drive and the lack of support for a electronic eject 2.88MB diskette drive option may be a limitation for customers with certain disabilities.

  • PC Server 520 systems using the SCSI-2 Fast/Wide PCI Adapter or containing integrated SCSI controller have three SCSI-2 connectors. Two connectors are internal, one fast and one fast/wide. The third external connector is fast/wide. Systems containing an adapter allow for any two of these ports, in any combination, to be used for SCSI device attachment. Systems with an integrated SCSI controller allow for either of the internal connectors to be used but not both at the same time; however, the external connector can always be utilized.

  • PC Server 520 models can support a maximum of two PC ServeRAID SCSI Adapters per system unit.

  • While the PC ServeRAID SCSI Adapter can support up to 15 drives per channel, actual configurations in PC Server 520 and 720 systems are limited to 12 SCSI-2 fast/wide hard drives per channel for internal storage. External storage is limited in today's SCSI environment to six SCSI-2 fast/wide drives per channel because of SCSI cable length restrictions associated with storage in PC Server Enterprise Expansion Tower.

  • Microprocessor SMP upgrades must be of the same clock speed. Mixing microprocessors of different speeds is not supported.

  • Customers should use the version of ServerGuide that ships with the system, or a later version, to load software and drivers. Earlier versions of ServerGuide may not be compatible with the server.
Refer to the Software Requirements section for operating systems limitations.

ServerGuide Ordering and Installation Information

ServerGuide is available when shipped as part of the PC Server 520 and is not sold separately.

ServerGuide CDs contain encrypted software products. When you receive your IBM PC Server you must order activation keys, at a charge, to unlock and install the software products you want to use.

Each ServerGuide package contains a unique ServerGuide license number, which must be specified on your software order with the software product part number. The ServerGuide license number and the part number are used by IBM to generate the activation key, which is then provided to the customer. The activation key can then be used to unlock the software product for installation.

A product order form is included in ServerGuide documentation delivered with the IBM PC Server. Activation keys are normally communicated by IBM within a few hours, assuming communication by fax.

For complete information about ServerGuide, including ordering part numbers, refer to Software Announcement 296-057, dated February 27, 1996.

Proof of Entitlement for ServerGuide Software Products: When an order for one of these products is processed, a fax containing the activation key and product identification is sent by IBM to the remarketer who placed the order. The remarketer in turn sends a copy of the fax to the customer. Proof of Entitlement to use one copy of the software product consists of a copy of the IBM fax containing the activation key and a copy of the ServerGuide license diskette label showing the diskette serial number.

The customer should attach a copy of the IBM fax to the copy of the diskette label and keep as Proof of Entitlement.

For IBM customers ordering through IBM representatives, the same Proof of Entitlement applies. In this case, the fax containing the activation key will normally be transmitted directly from IBM to the customer.

Planning Information

Customer Responsibilities: The PC Server 520 is designated as customer setup. Customer setup instructions are shipped with the system.

Configuration Information

Basic Configuration: PC Server 520 array systems contain a fast/wide cable connected to the SCSI-2 controller/adapter at one end; the other end is connected to the input side of the hot-swap backplane. A two-drop fast/wide cable is connected to the output side of the hot-swap backplane. The first drop is connected to the CD-ROM through a 68- to 50-pin SCSI converter, while the second drop is provided for attachment of an optional internal SCSI device in either bays B1 or B2. If connecting an 8-bit (narrow) device to this cable, a 68- to 50-pin SCSI converter (32G3925) must be obtained. The remaining B1 or B2 bay supports a floppy disk drive interfaced device.

Internal Hot-Swap Expansion Considerations for Non-Array Models: When adding second or third banks of hot-swap hard disk drives, it is necessary to install the PC Server Power Supply Upgrade (70G9739) in addition to the PC Server Hot-Swap Backplane III (76H2670) and SCSI PCI Card to Backplane Fast/Wide Cable (94G3988) options. Also, an appropriate SCSI adapter, such as the PC Server SCSI-2 Fast/Wide PCI Adapter II (94G4673), is required for attachment of the backplane.

Internal Hot-Swap Expansion Considerations for Array Models: Array models support up to 12 SCSI-2 hot-swap hard drives per channel. When adding a second hot-swap backplane, a PC Server Power Supply Upgrade (70G9739) is required in addition to the PC Server Hot-Swap Backplane III (76H2670) and SCSI PCI Card to Backplane Fast/Wide Cable (94G3988). One end of the SCSI-2 PCI Card to Backplane Fast/Wide Cable is connected to one of the remaining two internal connectors on the PC ServeRAID SCSI Adapter, while the other end is connected to the hot-swap backplane. If installing a third PC Server Hot-Swap Backplane III, a Backplane-to-Backplane Cable (94G4070) can be used to daisy chain from the second backplane. This eliminates the need to use a second SCSI PCI Card to Backplane Fast/Wide Cable. However, for performance considerations, the third backplane can be cabled directly to the PC ServeRAID SCSI Adapter through the use of SCSI PCI Card to Backplane Fast/Wide Cable. Daisy chaining more than two backplanes per connector/RAID channel is not supported.

Cable Orders: Except for system power, keyboard, mouse, and monitor connections, there are no cabling requirements to set up and test this server. Cables are provided with the system unit and monitor, and the instructions are provided as part of initial setup.

Appropriate cabling is necessary to attach the server to the LAN. The cabling is dependent on the network interface card (NIC) and LAN requirements chosen. Cabling selection, installation, and physical connection are customer responsibilities.

Installability: The PC Server 520 models require at least 30 minutes for installation. Installation includes unpacking, setting up, and powering on the system. Additional time is required to install an operating system and other adapters or features.

Packaging: One Box

Shipment Group

  • System unit
  • Keyboard with attached cable
  • Mouse with attached cable
  • PC Server 520 system library
  • PC Server 520 setup sheet
  • System diskettes (PCI/Micro Channel)
  • EISA configuration diskette (PCI/EISA)
  • Diagnostic diskette (PCI/EISA)
  • Video support diskettes
  • SCSI-2 support diskettes (except PCI/EISA array)
  • PCI RAID support diskettes (array models)
  • ServerGuide CD library
  • U. S. line cord
Accessories and/or Supplies: Lexmark International, Inc., manufactures and markets IBM supplies. For information about products or services, call Lexmark at 800-358-5835.

Security, Auditability, and Control

Security and auditability features of these servers are:

  • Power-on and supervisor passwords functions provide controls of who has access to the server setup program and data on the server.

  • A mechanical lock allows users to lock the system front-cover door to prevent unauthorized personnel access to diskette drives or removable media.

  • Selectable boot sequence can be used to prevent unauthorized installation of software or removal of data from the diskette drive.

  • Tie-down capability is achievable by utilizing a common "U" bolt attached to the back frame.

  • Operation without a keyboard and display are supported once the server is configured with the appropriate network operating system. This minimizes the risk of unauthorized persons tampering with the system software and configuration.

  • A PC Server security cover is optionally available to prevent unauthorized access to server external ports and cover retaining screws.

  • The PC Server 520 PCI/Micro Channel model is C2 security-enabled. This security system is designed to alert the system administrator if unauthorized intrusions to the PC Server 520 are detected.
SCSI, as defined in the American National Standards Institute (ANSI) standard X3.131-1986, provides a port for the attachment of external devices. The SCSI bus can be internal or external to the system unit. PC Server 520 models using the SCSI-2 Fast/Wide PCI controller and PC ServeRAID SCSI Adapter are in conformance with this standard and have an external port.

PC Server 520 systems with these adapters also conform with ANSI SCSI-2 and work with SCSI-2 fast or fast/wide devices. Customers are responsibile for ensuring that the server is secure, or has a security cover, to prevent sensitive data from being removed via the external SCSI ports. User management is responsible for evaluation, selection, and implementation of security features, administrative procedures, and appropriate controls in application systems and communications facilities.


This product is available for purchase under the terms of the IBM Customer Agreement (ICA).

IBM Credit Corporation Financing: Term leases and installment payment plans are available for commercial and state and local government customers.

Warranty Period

  • System Hardware: Three years; however, an optional one year warranty is available via special bid.

  • Related Options:
    • ServeRAID Adapter: Three years
    • All other announced options: One year
Warranty Service
  • PC Server (8641): IBM On-Site Repair (IOR), 24 hours a day, 7 days a week, four-hour average response

International Warranty Service

Customers who travel or need to move products to another country can register the products for IBM International Warranty Service. During the original warranty period, customers will be provided service through the service delivery methods available for their specific IBM system in the servicing country. Upon registering with the International Warranty Office (IWSO), IBM will issue an International Warranty Service Certificate that will be honored virtually worldwide, where IBM or IBM resellers sell and service IBM PC products.

For more information on IBM International Warranty Service in the United States and Canada, or to register your IBM PC systems, contact IBM at 800-IWS-7426 (497-7426). Refer to Services Announcement 694-028, dated October 17, 1994.

Licensing: IBM programs included with the IBM PC Server 520 are licensed under the terms and conditions of the IBM license agreements that ship with the system.

Maintenance Service

  • PC Server (8641): IOR
The following level of post-warranty service is available:
  • IOR, 7 days per week, 24 hours a day, four-hour average response
IBM Hourly Service Rate Classification: One

IBM Warranty Service, Maintenance Service, or IBM Hourly Service can be obtained by calling 800-IBM-SERV (426-7378). IBM Hourly Service is available at the applicable rate and terms, including element exchange price, if applicable.

Volume Maintenance Option: The PC Server 520 systems are eligible machines and qualifying machines under the Volume Maintenance Option* of the ICA.

Mid-Range System Option: The PC Server 520 systems are eligible machines for the Mid-Range System Option* of the ICA.

Eligible                          Discount
Types                    Three-Year      Five-Year

8641 17% 22%

Corporate Service Option: The PC Server 520 systems are eligible machines for the Corporate Service Option* of the ICA.

Option                   Three-Year      Five-Year

Network 25% 30% System 17% 22%

Extended Maintenance Option: The PC Server 520 systems are eligible machines under the Extended Maintenance Option of the ICA.

Central Facility Maintenance Service (CFMS) Option: The PC Server 520 systems are eligible machines for CFMS Option* of the ICA.

A minimum of six machines is required at the central facility before requesting maintenance service. The Additional Maintenance Charge Factor is currently 0.5 hours. The terms and conditions are stated in the Attachment for CFMS Option.

When a type of service involves the exchange of a machine or part, the replacement may not be new but will be in good working order.

*     A revised exhibit will be available at a later date.

Product Availability Status: New product available

Field Installable Features: Yes

Model Conversions: No

Customer Setup: Yes

Licensed Internal Code: No


                  Machine    Model     Part
Description       Type       Number    Number      ERP(10)

System Unit 8641 MD0 8641MD0 $ 6,695 System Unit 8641 EE0 8641EE0 8,625 System Unit 8641 EE1 8641EE1 10,465 System Unit 8641 EEE 8641EEE 14,675 System Unit 8641 EEL 8641EEL 18,850

Description                            Number        ERP

PC ServeRAID SCSI Adapter 70G8489 $1,950 SMP 166MHz Upgrade 94G6053 1,095 HS Backplane III 76H2670 275 Internal Bulkhead Cable 76H2675 75

Annual Minimum Maintenance Charges

Machine                     IOR
Type/Model              (24 x 7)(11)        CFMS

8641-MD0 $1,300 $1,235 8641-EE0 1,300 1,235 8641-EE1 1,450 1,378 8641-EEE 1,450 1,378 8641-EEL 1,450 1,378

(10)  Estimated Reseller Price to end users.  Actual reseller prices
      may vary.
(11)  Four-hour average response

+     Registered trademark of Microsoft Corporation

Share this page

Digg Linked In

Contact IBM