User`s guide
9-20
Obey the following cautions when the auto rebuild function is used.
Do not turn off the power of the server in the interval from a fault of a hard disk drive to the end of the auto
rebuild.
Install a new hard disk drive after the interval of 90 seconds or longer has passed from the removal of the
defective hard disk drive.
If a hard disk drive is being rebuilt, do not replace another disk. (The disk lamp on the hard disk being rebuilt
is lit green or amber alternatively.)
Use of Internal Hard Disk Drives in the RAID System
This section describes how to use hard disk drives in the RAID System.
You can build a RAID System by using the Internal RAID Controller (SAS/SATA HW RAID0/1), optional RAID
controller (128MB, SAS/SATA HW RAID0/1/5/6), or optional Disk Array Controller (SAS, EXTERNAL).
IMPORTANT:
Making hard disk drives in the RAID System or changing the RAID level initializes
hard disk drives. If the hard disk drive to be configured in the RAID System has your
valuable data stored, make sure to make a backup copy of the data in another hard disk
drive before installing the RAID Controller and configuring the RAID System.
More than one hard disk drive is required to configure a Logical Drive.
Use hard disk drives of the same capacity and performance (e.g., revolution) for each
pack to configure them in the RAID System.
NOTES:
Make sure of RAID levels and hard disk drives available for the RAID Controller to
choose an appropriate controller.
A Logical Drive except for RAID0 increases disk reliability. However, the actually
available capacity becomes smaller than the total hard disk drive capacity in the Logical
Drive.
Internal RAID Controller / Optional RAID Controller
To build a RAID System, use the Internal RAID Controller (SAS/SATA HW RAID0/1) or optional RAID Controller
(128MB, SAS/SATA HW RAID0/1/5/6). With this controller, the internal hard disk drives are recognized as RAID
drives.
Use WebBIOS to configure the RAID System. See Chapter 4 for details.