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Chapter 2 Checking before OS Installation
z Array Configuration
Only RAID 1 level can be configured. The array is configured for two internal hard disks on the server.
For details, refer to "Integrated Mirroring SAS User’s Guide" in the Array Controller Document & Tool
CD.
Array Configuration with the SAS Array Controller Card
z
Hardware Configuration
• Be sure to install the SAS array controller card (PG-140FL).
• Only internal hard disk units can be used. Up to eight internal hard disk units can be installed on this
server.
• Be sure to use hard disk units of the same model and with the same capacity.
• The hot spare (standby disk) can be configured. For details and notes on the hot spare disk, refer to
"MegaRAID SAS User’s Guide" in the Array Controller Document & Tool CD.
z Array Configuration
The following RAID levels can be configured. The number of units that can be set varies according to
the RAID level. For details, refer to the manual in the Document & Tool CD supplied with the SAS
array controller card.
• RAID level 0: 1 to 8 units
• RAID level 1: 2 units
• RAID level 5: 3 to 8 units
z Notes before Installing the OS
Set the Write Policy for the logical drive of the array controller (MegaRAID SAS 8300X) to Write
Through until installations of the OS and the RAID Management Tool (Global Array Manager) are
completed. If other than Write Through needs to be set, change it after installing the RAID Management
Tool. For setting and changing the Write Policy, refer to "MegaRAID SAS User’s Guide" in the Array
Controller Document & Tool CD.
Notes
• When a RAID-configured disk is used
Hard disk units that have been used before may have unwanted partition information or array
configuration information, which may cause unexpected problems. If you connect any hard disk units
with usage history to this server, format them at low level on another system before connecting them
to the server. For information on how to format the hard disk units, refer to the manual supplied with
the system to be used.
• To remove disks
When configuring RAID in ServerStart, the array initialization utilizes the background initialization
function. Before removing the disk units, confirm that the initialization is complete using the RAID
Management Tool.
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