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Chapter 3 - Disk Array Controller
Features
This chapter describes the features of the disk array controller.
1. Rebuild
If a HDD is defected, the rebuild feature can recover the data in the defected HDD. The rebuild can be
applied to redundant logical drives in the RAID1, RAID5, or RAID10 level.
1-1. Manual Rebuild
The manual rebuild can be performed by using WebPAM, the management utility of the disk array controller.
Select a desired hard disk drive and start the rebuild manually.
For the detailed operation, refer to the online manual "Web-based Promise Array Manager User's Guide" in
the "SATA2 Array Management Software" CD-ROM coming with the card.
1-2. Auto Rebuild
The disk array controller can automatically start the rebuild without using any utility such as WebPAM.
The auto rebuild includes two types as follows:
Standby rebuild
Automatic rebuild by using hot-spare disks. In the configuration including hot-spare disks, the
rebuild is performed automatically if a hard disk drive assigned to a logical drive is defected.
Hot-swap rebuild
Automatic rebuild by hot-swapping defected HDD.
Note the following for the rebuild:
The HDD to be used for rebuild should have the same capacity, number of revolutions, and standard as
the defected HDD.
During rebuild, the processing rate is decreased due to much load.
Notice
During rebuild, do not shutdown or reboot the server. If the server is shutdown by an accident such as
power interruption, turn on the power again as soon as possible. The rebuild is automatically restarted.
The hot swap rebuild feature is available only when the card is connected with the additional HDD cage
or the server that supports hot swap feature.
The interval from the removal of the defected HDD to the installation of a substitute HDD should be 90
seconds or longer.
If the hot-swap rebuild does not operate, perform the manual rebuild.
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