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User Guide
Installing or Removing a RAID Controller Board
the online document in NEC EXPRESSBUILDER CD-ROM for
configuring RAID using the onboard RAID controller.
The RAID controller board is an optional PCI board developed to improve data
reliability.
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.
The server can include one of the following optional RAID controller:
■ MegaRAID SCSI 320-1
■ MegaRAID SCSI 320-2
■ LSILogic MegaRAID SAS 8480E
■ LSILogic MegaRAID SAS 8408E
See the manual that comes with your RAID controller for details.
Function
Level
Hot swap
Auto rebuild
Expand capacity
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.
■ At least two hard disk drives are required to configure a disk array.
■ Hard disks used in the disk array configuration should have the same disk
revolution rate and capacity.
Note: The server contains onboard RAID controller. See
Table 22: Functions of a Disk Array Controller
Description
Support RAID levels RAID0, RAID1, RAID5, RAID10 and RAID50.
Allows a hard disk to be replaced while the system is running
depending on RAID level and system configuration.
After the defective hard disk is replaced with a new one, the data
saved in the defective hard disk is automatically recovered from the
data saved in the remaining hard disks depending on RAID level.
The addition of a hard disk without system interruption can
automatically expand the area in which disk arrays are available, and
the logical drive capacity.
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