4-40 Configuring Your ServerFeatures of On-board RAID (MegaRAID ROMB)This section describes the features of the on-board RAID (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 or RAID5 level.Manual RebuildThe manual rebuild can be performed by using MegaRAID Storage Manager (called MSMhereafter), the management utility of the on-board RAID (MegaRAID ROMB). Select a HDD andstart the rebuild manually.For the detailed operation, refer to the "MegaRAID Storage Manager User's Guide" in NECEXPRESSBUILDER CD-ROM that comes with the server.Auto RebuildThe on-board RAID (MegaRAID ROMB) can automatically start the rebuild without use of anyutility such as MSM.The auto rebuild includes two types as follows: Standby rebuildAutomatic rebuild by using hot-spare disks. In the configuration including hot-spare disks,the rebuild is performed automatically if a HDD assigned to a virtual disk is defected.