NEC EXPRESS5800/120MF, User Manual

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Upgrading your Server 7-33
9.
Reinstall the botton air duct removed earlier.
10.
Replace the left side access panel and close the front door.
11.
Plug in the system power cord, and power on the system.
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.
The functions of a disk array controller are the following:
Function Description
Level Support RAID levels RAID0, RAID1 and RAID5.
Hot plug
Allows a hard disk to be replaced while the system is running depending on
RAID level and system configuration.
Auto rebuild
After the defected hard disk is replaced with a new one, the data saved in the
defected hard disk is automatically recovered from the data saved in the
remaining hard disks depending on RAID level.
Expand capacity The addition of a hard disk without system interruption can automatically
expand the area in which disk arrays are available.
Please note the following when installing and configuring a disk array:
!
Disk array controller boards are easily affected by static electricity. Handle the
disk array controller board only after making body contact with the metallic
frame section of the server chassis in order to discharge the static electricity from
your body. Also, never make contact with terminals and components on the disk
array controller board using your bare hands.
!
To change the disk array configuration or the RAID level, the hard disks must be
initialized. If important data is saved on the hard disks used to constitute a disk
array, first back up the data on the other hard disks and then install the boards and
configure the disk array.
!
More than one hard disk is required to configure a disk array.
!
Hard disks used in the disk array configuration should have the same disk
revolution rate and capacity.
!
Up to four disk array controller boards can be installed in your server.
!
Several RAID (Redundant Arrays of Independent Disks) levels can be set for the
newly installed disk array controller boards. For details of the available RAID
types, data transfer rate, and array configurations refer to the online
documentation on the
EXPRESSBUILDER CD-ROM that comes with your
system or the vendor documentation that comes with the disk array controller.