RAID Controller Board
The functions of a disk array controller are described in the following table.
Functions of a Disk Array Controller
Function
Description
Level | Support RAID levels RAID0, RAID1, RAID5, and RAID0+1. |
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Hot plug | Allows a hard disk to be replaced while the system is running depending on |
| RAID level and system configuration. |
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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. |
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Expand capacity | The addition of a hard disk without system interruption can automatically |
| expand the area in which disk arrays are available. |
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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.
!See PCI Board in this chapter for the slots in which a RAID Controller can be installed.
!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
!The available capacity of the hard disks in the disk array configuration will be lower than the capacity of the hard disks in a standard configuration, but the disk reliability is much improved.
