Auxiliary-write cache IOA (FC 5583, 5590; CCIN 574F)
Learn about the specifications and installation notes for the auxiliary-write cache IOA adapter.
Custom Card Identification Number (CCIN) 574F is an auxiliary-write cache IOA that provides 1.5 GB of (compressed) auxiliary-write cache when paired with a RAID disk controllers.
- The 574F auxiliary-write cache IOA can be used with the 5738, 5777, 2780, 2757, disk controllers.
- The 574F can be used as a replacement IOA for the 5708 auxiliary-write cache IOA.
- The 0641 includes a direct attach 2780 Peripheral Component Interconnect-X (PCI-X) Ultra4 RAID Disk Controller and a CCIN 574F auxiliary-write cache IOA.
- The 0649 includes a direct attach 5738 PCI-X Quad-Channel Ultra320 SCSI RAID Adapter and a CCIN 574F auxiliary-write cache IOA
- The 5582 includes an IOP-based 5738 PCI-X Quad-Channel Ultra320 SCSI RAID Adapter and a CCIN 574F auxiliary-write cache IOA.
- The 5583 includes an IOPless, 5777 PCI-X Quad-Channel Ultra320 SCSI RAID Adapter and a CCIN 574F auxiliary-write cache IOA
- The 5590 includes a 2780 PCI-X Ultra4 RAID Disk Controller and a CCIN 574F auxiliary-write cache IOA.
The auxiliary-write cache IOA mirrors the write cache of the disk-controller IOA to which it is connected. If a failure occurs to the write cache of the disk-controller, the auxiliary-write cache IOA provides a backup copy during the recovery of the failed IOA.
The disk controller IOA and the secondary, auxiliary-write cache IOA each require one PCI-X slot and must be installed together in the same enclosure. The disk controller IOA and the auxiliary-write cache IOA are connected by a SCSI cable (provided). The connecting SCSI cable is attached to SCSI bus port 3 of the disk controller IOA, reducing the number of SCSI buses that support disk drives from four to three. The reduction of SCSI buses can also reduce the number of disk drives supported by the disk controller, depending on the enclosure in which the disk controller is installed. No disk drives are driven by the auxiliary-write cache IOA.
- A
- SCSI connector
Considerations for installing or converting to feature 5582 or 5583
Read the following questions as they pertain to your system:
- Are you converting from feature 5738 to feature 5582 or 5583?
- Are you replacing any other existing storage adapters with features 5582 and 5583?
- Is your server partitioned, meaning is it an LPAR?
If the answer to any of these questions is yes, or you are unsure of the answers, it is a good idea to contact your authorized service provider for planning and deployment services.
For planning information and examples of deployment, see Planning for Disk Storage Availability with Auxiliary Write Cache Solutions
574F adapter specifications
Item | Description |
---|---|
Adapter FRU number | 42R5133 |
Cache battery FRU number | 39J5554 |
Cable FRU number | 39J1702 |
Cables | A specific storage adapter to auxiliary storage adapter SCSI cable is necessary and is provided with each feature or conversion. |
Unit description |
|
Operating system or partition requirements | IBM® i
Important: See the IBM Prerequisites website
for software prerequisites.
AIX®
|
Partition information |
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Related information |
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Installing the adapters
To install the adapters, refer to the PCI Adapters topic, and then return here for instruction on installing the SCSI cable:
Installing the SCSI cable
The disk controller adapter and the auxiliary-write cache adapter are connected by a SCSI cable.
To install the SCSI cable, do the following steps:
- Attach the SCSI cable to SCSI bus port 3 (fourth physical port)
of the disk controller adapter.
- Attach the cable to the SCSI port on the auxiliary-write cache adapter.
- Attaching the cable to the disk controller reduces the number of SCSI buses that support disk drives from four to three.
- Reducing the number of SCSI buses might also reduce the number of disk drives supported by the disk controller, depending on the system unit or expansion drawer in which the disk controller is installed.
- No disk drives are driven by the auxiliary-write cache adapter. This adapter protects against extended outage caused by loss of write cache, but does not protect against a disk controller failure.