Disk Array Controller Board - NEC Express5800 120Li User Manual

Disk Array Controller Board

The disk array controller board (N8103-80/81/90/91) is an optional PCI board developed to improve
data reliability.
NOTE:
document in NEC EXPRESSBUILDER CD-ROM for configuring
RAID using the onboard RAID controller.
Installing the disk array controller board allows you to use hard disk drives in the device bays of the
server and those in the optional additional disk unit in the disk array configuration.
Function of disk
array controller
Level
Hot plug
Auto rebuild
Expand capacity
Cautions
Note the following on the configuration of a disk array.
The disk array controller board is easily affected by static electricity. Handle the disk
array controller board after making your body contact with a metallic frame section of the
server to discharge the static electricity on your body. Do not make bare hands contact
with terminals and components on the disk array controller board. In addition, do not put
the disk array controller board on a desk directly. See "Static Precautions" for details of
the static electricity.
To change the disk array configuration or the RAID, the hard disk drives must be
initialized. If important data is saved in the hard disk drives used to constitute a disk array,
first back up the data in other hard disk drives before installing boards and configuring the
disk array.
At least two hard disk drives are required to configure a disk array.
Hard disk drives used in the disk array configuration should have the same disk revolution
rate and capacity in packs.
See "PCI Board" in this Chapter for the slot in which a board can be installed.
Up to four disk array controller boards can be installed in the server.
The server contains onboard RAID controller. See the online
Description
Supports RAID0, 1, 5, 10, or 50.
Allows a device such as a hard disk drive to be replaced under the system
operation status.
After the defected hard disk drive is replaced with a new one, the data saved
in the defected hard disk drive is automatically recovered from the data
saved in the remaining hard disk drives.
The addition of a hard disk drive without system interruption can
automatically expand the area in which disk arrays are available and logical
drive capacity.
Upgrading Your Server 9-41