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Configuring the disk subsystem in the 5802 expansion unit

Learn how to configure the SAS disk subsystem in the 5802 expansion unit.

Note: For 5802 expansion unit connector locations referred to in this procedure, see Model 5802 and 5877 connector locations.
  1. The SAS disk subsystem in the 5802 expansion unit can hold up to 18 disk drives. The disks in this subsystem can be organized in several different configurations depending on the operating system used, the type of SAS adapter, and the position of the hard-disk-drive partitions switch.
    Notes:
    • The hard-disk-drive partitions switch is located at the rear of the 5802 expansion unit, just below the SAS connectors.
    • If the hard-disk-drive partitions switch position is changed, you must power the 5802 expansion unit off and on in order for the 5802 to sense the new position of the hard-disk-drive partitions switch.
    The SAS disk subsystem in the 5802 expansion unit is supported by the following operating systems:
    • AIX®
    • IBM® i
    • Linux
    • VIOS

    To determine the level of software you need to support the SAS disk subsystem in the 5802 expansion unit, see IBM Prerequisite.

    Table 1. Positions of the hard-disk-drive toggle switch
    Operating system Position 1 Position 2 Position 4
    AIX Options:
    • One FC 5901 adapter (PCIe Dual - x4 SAS)
    • One FC ESA1 adapter (PCIe2 RAID SAS Dual-port 6 Gb)
    • Two FC 5903/5805 adapters (PCIe Dual - x4 3 Gb SAS RAID)
    • Two FC ESA1 adapters (PCIe2 RAID SAS Dual-port 6 Gb)
    • Two FC 5913 or two FC ESA3 adapters (PCIe2 1.8 GB cache RAID SAS Tri-port 6 Gb)
      Note: The top ports of the FC 5913 or the FC ESA3 pair must attach by a high-density (HD) SAS AA cable.
    		 Options:
    • Two FC 5901 adapters (PCIe Dual - x4 SAS)
    • Two FC 5903/5805 adapters (PCIe Dual - x4 3 Gb SAS RAID)
    • Two FC ESA1 adapters (PCIe2 RAID SAS Dual-port 6 Gb)
    • Two FC 5913 or two FC ESA3 adapters (PCIe2 1.8 GB cache RAID SAS Tri-port 6 Gb)
      Note: The top ports of the FC 5913 or the FC ESA3 pair must attach by an HD SAS AA cable.
    		 Options:
    • Four single FC 5901 adapters (PCIe Dual - x4 SAS)
    • Four single FC ESA1 adapters (PCIe2 RAID SAS Dual-port 6 Gb)
    IBM i Not supported Options:
    • Two single FC 5901 adapters (PCIe Dual - x4 SAS)
    • Two FC 5903/5805 adapters (PCIe Dual - x4 3 Gb SAS RAID)
    • Two FC ESA1 adapters (PCIe2 RAID SAS Dual-port 6 Gb)
    • Two FC 5913 or two FC ESA3 adapters (PCIe2 1.8 GB cache RAID SAS Tri-port 6 Gb)
      Note: The top ports of the FC 5913 or the FC ESA3 pair must attach by an HD SAS AA cable.
    		 Not supported
    Linux Options:
    • One FC 5901 adapter (PCIe Dual - x4 SAS)
    • One FC ESA1 adapter (PCIe2 RAID SAS Dual-port 6 Gb)
    • Two FC 5903/5805 adapters (PCIe Dual - x4 3 Gb SAS RAID)
    • Two FC ESA1 adapters (PCIe2 RAID SAS Dual-port 6 Gb)
    • Two FC 5913 or two FC ESA3 adapters (PCIe2 1.8 GB cache RAID SAS Tri-port 6 Gb)
      Note: The top ports of the FC 5913 or the FC ESA3 pair must attach by an HD SAS AA cable.
    		 Options:
    • Two FC 5901 adapters (PCIe Dual - x4 SAS)
    • Two FC 5903/5805 adapters (PCIe Dual - x4 3 Gb SAS RAID)
    • Two FC ESA1 adapters (PCIe2 RAID SAS Dual-port 6 Gb)
    • Two FC 5913 or two FC ESA3 adapters (PCIe2 1.8 GB cache RAID SAS Tri-port 6 Gb)
      Note: The top ports of the FC 5913 or the FC ESA3 pair must attach by an HD SAS AA cable.
    		 Options:
    • Four single FC 5901 adapters (PCIe Dual - x4 SAS)
    • Four single FC ESA1 adapters (PCIe2 RAID SAS Dual-port 6 Gb)
    Note: FC means feature code.
    Tip: If you are planning to configure RAID arrays, ensure that you have the minimum number of available disks for each RAID level:
    RAID 0
    Minimum of one drive per array
    RAID 5
    Minimum of three drives per array
    RAID 6
    Minimum of four drives per array
    RAID 10
    Minimum of two drives per array

    For additional SAS RAID controller information for the AIX operating system, see SAS RAID controller for AIX .

    For additional SAS RAID controller information for the IBM i operating system, see SAS RAID controllers for IBM i.

    For additional SAS RAID controller information for the Linux operating system, see SAS RAID controller for Linux .

    For information related to device parity protection, see Device parity protection.

Parent topic: 5802 and 5877 expansion units

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Last updated: Tue, September 30, 2014