
v
The hard-disk-drive partitions switch is located at the rear of the 58/02 expansion unit, just below
the SAS connectors.
v
If the hard-disk-drive partitions switch position is changed, you must power the 58/02 expansion
unit off and on in order for the 58/02 to sense the new position of the hard-disk-drive partitions
switch.
The SAS disk subsystem in the 58/02 expansion unit is supported by the following operating systems:
v
AIX
v
Linux
v
VIOS
To determine the level of software you need to support the SAS disk subsystem in the 58/02
expansion unit, see IBM
Table 5. Positions of the hard-disk-drive toggle switch
Operating system
Position 1
Position 2
Position 4
AIX
Either a (FC 5901) -
PCIe Dual - x4 SAS
Adapter or
two (FC 5903) - PCIe
Dual - x4 3Gb SAS
RAID Adapters
Either two (FC 5901) -
PCIe Dual - x4 SAS
Adapters or
two (FC 5903) - PCIe
Dual - x4 3Gb SAS
RAID Adapters
Four (FC 5901) - PCIe Dual
- x4 SAS Adapters
Linux
Either a (FC 5901) -
PCIe Dual - x4 SAS
Adapter or
two (FC 5903) - PCIe
Dual - x4 3Gb SAS
RAID Adapters
Either two (FC 5901) -
PCIe Dual - x4 SAS
Adapters or
two (FC 5903) - PCIe
Dual - x4 3Gb SAS
RAID Adapters
Four (FC 5901) - PCIe Dual
- x4 SAS Adapters
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 Linux operating system, see SAS RAID
controller for Linux .
For information related to device parity protection, see Device parity protection.
Cabling the 58/02 disk subsystem
Learn about how to connect the disk subsystem in the 58/02 expansion unit.
30
Enclosures and expansion units
Summary of Contents for Escala Power7 Series
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