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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. 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 6 units
• RAID level 1: 2 units
• RAID level 5 (recommended): 3 to 6 units
• RAID level 10: 4 or 6 units
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 array configuration by
ServerStart.
For more details on the array configuration, refer to "PRIMERGY RX300 S2 Onboard SCSI RAID
User's Guide".
table: Array Configuration
Item Contents
Number of physical packs 1
Number of system drives 1
Pack order of hard disk units Channel 0 is packed preferentially in ascending order of SCSI-ID
set for the hard disk units.
E.g.:(In a two-channel configuration)
Pack A-1 Channel 0 SCSI-ID 0
Pack A-2 Channel 0 SCSI-ID 1
Pack A-3 Channel 0 SCSI-ID 2
Pack A-4 Channel 1 SCSI-ID 0
Pack A-5 Channel 1 SCSI-ID 1
When a hot spare is specified, the hard disk unit with the largest
channel number and the largest SCSI-ID will be used as the hot
spare hard disk unit.