Configuration By Internal Raid Controller - NEC Express5800 series User Manual

4-8
Configuring Your Storage and I/O Blade

Configuration by Internal RAID Controller

This section describes how to use the internal hard disk drives as RAID System by Internal RAID
Controller.
Features of Internal RAID Controller
Rebuild
If a HDD is defected, the rebuild feature can recover the data in the defected HDD. The rebuild can
be applied to redundant virtual disks in the RAID1, RAID5, or RAID6 level.
Manual Rebuild
The manual rebuild can be performed by using WebBIOS or Universal RAID Utility, the
management utility of the Internal RAID Controller. Select a HDD and start the rebuild manually.
For the detailed operation, refer to the "Universal RAID Utility Ver2.0 User's Guide" in NEC
EXPRESSBUILDER DVD that comes with the CPU blade.
Auto Rebuild
The Internal RAID Controller can automatically start the rebuild without use of any utility such as
Universal RAID Utility.
The auto rebuild includes two types as follows:
Standby rebuild
Automatic rebuild by using hot-spares. In the configuration including hot-spares, the
rebuild is performed automatically if a HDD assigned to a virtual disk is defected.
Hot-swap rebuild
Automatic rebuild by hot-swapping defected HDD.
IMPORTANT:
The HDD used for rebuild should have the same capacity, rotation
speed, and standard as the defected HDD.
During rebuild, the processing rate is decreased due to much load.
During rebuild, do not shutdown or reboot the CPU blade connected
with this Storage and I/O Blade. If the CPU blade is shutdown by an
unforeseen accident such as power interruption, turn on the power
again as soon as possible. The rebuild is automatically restarted.
The interval from the removal of the defected HDD to the
installation of a substitute HDD should be 60 seconds or longer.
If the hot-swap rebuild does not operate, perform the manual
rebuild.
Note the following for the rebuild: