C-1
Appendix C
Configuring Internal Adapters (Partition
Reinstallation Only)
When performing a partition reinstallation, use the information in this appendix to
configure the RAID adapter that was shipped inside the partition, as needed.
C.1 Configuring the MegaRAID SAS Boot Adapter
The Express5800/A1160 system cell includes a hard disk riser capable of supporting up
to six Serial Attached SCSI (SAS) drives and one optical device. The peripherals in the
hard disk riser are connected through their respective interfaces to an integrated drive
elctronics (IDE) port (for the optical device) or an SAS host bus adapter (HBA) for the
disk drives.
The disk HBA currently supports five possible disk configurations:
•
RAID0 for disk striping
•
RAID1 for mirroring
•
RAID5 for disk striping with distributed parity
•
RAID10 for striped data across mirrored spans
•
RAID50 for distributed parity with disk striping
The options provided by the HBA and disk drives enable you to customize your boot disk
hardware to meet specific needs. For a configuration in which performance and
resiliency are important considerations, the SAS disk drives running RAID1 should be
used as the default boot solution.
The following are possible combinations for a hard disk and HBA configuration:
•
RAID0 – One to six equivalent capacity disks (slots 0 and 1). Performance
optimized. No protection.
•
RAID1 – Two equivalent capacity disks. Failover protected.
•
RAID1 – Three equivalent capacity disks. One disk is a dedicated hot spare.
Failover protected
•
RAID5 – Three to six equivalent capacity disks. Failover protected.
•
RAID10 – Two sets of two equivalent capacity disks. Failover protected
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