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Chapter 2 Checking before OS Installation
2.3.2 Notes on Configuring RAID
Take the following notes when you configure a RAID system.
■ Hardware Configuration
• Only internal hard disk units can be used.
• Be sure to use hard disk units of the same model and with the same capacity.
• Up to six hard disk units can be installed in the standard server. When the internal hard disk unit bay
conversion kit is used, up to nine units can be installed. Do not set the number of units more than the
maximum.
• The number of units that can be set at each RAID level is as follows:
• RAID level 0: 2 to 9 units
• RAID level 1: 2 units
• RAID level 5 (recommended): 3 to 9 units
• RAID level 10: Even number of units between 4 and 8
When the OS is installed using ServerStart, only one RAID card can be installed. If you need more
cards, install them after OS installation.
■ Array Configuration
The following shows the pack order of hard disk units for a two-channel configuration.
For more details on the array configuration, refer to "PRIMERGY ServerBooks" supplied with the
server, and "Supplement" supplied with options.
table: Array Configuration
Item Contents
Number of physical packs 1
Number of system drives 1
Pack order of hard disk units Channels 0 and 1 are packed alternately in ascending order of SCSI-
ID set for the hard disk units (in a two-channel configuration).
E.g.:(In a two-channel configuration)
Pack A-1 Channel 0 SCSI-ID 0
Pack A-2 Channel 1 SCSI-ID 0
Pack A-3 Channel 0 SCSI-ID 1
Pack A-4 Channel 1 SCSI-ID 1
Pack A-5 Channel 0 SCSI-ID 2
When a hot spare is specified, the hard disk unit with the smallest
channel number and the smallest SCSI-ID will be used as the hot
spare hard disk unit (normally, Channel 0 and SCSI-ID 0).