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3
Configuring a Redundant Disk Array
16
Preparing hard disk drives to participate in an array
Table 1 identifies the locations of hard disk drives that can be used by the RTM SAS/SATA
controller in an array. It also shows the physical SAS connection that must be present before you
can include the hard disk drive in an array through a SAS BIOS configuration.
Tip: Before configuring an array in the SAS BIOS, you may want to make a copy of any existing
data on the hard disk drives. All existing data is deleted from the hard disk drives that participate
in an IS array. For a hard disk drive that will act as the primary hard disk drive in an IM or IME
array, the SAS BIOS configuration gives you the option to keep existing data on the hard disk
drive. For other hard disk drives in an IM or IME array, any existing data is deleted.
Table 1. Locations and SAS connections for eligible disks
Disk location Connection to the RTM SAS/SATA controller
RTM (with its SAS/SATA controller hosting the RAID) On board (no action required)
HDD AMC on a CPM in the front slot hosting the RTM Zone 3 connectors (no action required)
Another RTM Cable between the SAS 1 ports on each RTM (see
Figure 3 on page 17 )
HDD AMC on another CPM in the front slot hosting
another RTM Cable between the SAS 2 ports on each RTM (see
Figure 3 on page 17 )
HDD AMC in bay 1 on an ATCA-45xx CPM in the front slot
hosting an ATCA-5400 RTM Custom cable from the ATCA-5400 RTM SAS 1 port to
one of the RTM SAS ports
HDD AMC in bay 2 on an ATCA-45xx CPM in the front slot
hosting an ATCA-5400 RTM Custom cable from the ATCA-5400 RTM SAS 2 port to
one of the RTM SAS ports
Any other hard disk drive or hard disk drive array that can
be connected to the RTM with a cable Cable from the hard disk drive or hard disk drive
array to a SAS port on the RTM