Configuring Your Server 4-43Features of Onboard RAID Controller (MegaRAID ROMB)This section describes the features of the Onboard RAID Controller (MegaRAID ROMB).RebuildIf a HDD is defected, the rebuild feature can recover the data in the defected HDD. The rebuild canbe applied to redundant virtual disks in the RAID1, RAID5, or RAID6 level.Manual RebuildThe manual rebuild can be performed by using Universal RAID Utility, the management utility ofthe Onboard RAID Controller (MegaRAID ROMB). Select a HDD and start the rebuild manually.For the detailed operation, refer to the "Universal RAID Utility User's Guide" in NECEXPRESSBUILDER DVD that comes with the server.Auto RebuildThe Onboard RAID Controller (MegaRAID ROMB) can automatically start the rebuild without useof any utility such as Universal RAID Utility.The auto rebuild includes two types as follows: Standby rebuildAutomatic rebuild by using hot-spares. In the configuration including hot-spares, therebuild is performed automatically if a HDD assigned to a virtual disk is defected. Hot-swap rebuildAutomatic rebuild by hot-swapping defected HDD.IMPORTANT: Note the following for the rebuild: The HDD used for rebuild should have the same capacity, rotationspeed, 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 server. If the server isshutdown by an unforeseen accident such as power interruption,turn on the power again as soon as possible. The rebuild isautomatically restarted. The interval from the removal of the defected HDD to theinstallation of a substitute HDD should be 60 sec or longer. If the hot-swap rebuild does not operate, perform the manualrebuild.
