NEC EXPRESS5800/120Re-2, Service Manual

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Disassembly and Reassembly 4-33
Disk Array Controller Board
The disk array controller board is an optional PCI board provided to improve
data reliability.
Installing the disk array controller board allows you to use hard disks in the
device bays of the server and those in the optional expansion disk cabinet in the
disk array configuration.
IMPORTANT:
! The disk array controller board is extremely sensitive to static electricity.
Make sure to touch the metal frame of the Server to discharge static electricity
from your body before handling the disk array controller board. Do not touch
the disk array controller board terminals or on-board parts by a bare hand or
place the disk array controller board directly on the desk. For static notes, see
the section "Anti-static Measures" described earlier.
!
Installing the disk array controller or changing the RAID level initialization of
the hard disk drives. If the hard disk to be configured in the array has your
valuable data stored, make sure to make a backup copy of the data before
installing the disk array controller board and configuring the array.
!
The disk array configuration requires at least two hard disks.
!
Use hard disks of the same capacity and performance (e.g., RPMs) for each
pack in the array.
NOTES:
!
Before installing a disk array controller board, start the SETUP utility, select
[Advanced]
→
[PCI Configuration], and confirm that [Enabled] is set for the
parameter [PCI Slot xx ROM] (xx: PCI slot number).
!
A disk array configuration of RAID1, RAID5, or RAID0+1 increases disk
reliability. However, the available capacity becomes smaller.