Toshiba Qosmio G30 PQG31C-HD202EF Users Manual Canada; English - Page 283

TOSHIBA RAID ■ Boot menu When 2 hard disk drives are connected, it is possible to select which hard disk drive to boot from in the boot menu. However, if a RAID configuration is used, the 2 hard disk drives are recognized as 1 drive and there is no change in the boot configuration no matter which hard disk drive is selected. ■ When using a RAID-1 (mirroring) configuration, the additional hard disk drive's capacity must be equal to or more than the capacity of the existing hard disk drive. ■ The hard disk drives used in the RAID configuration should not be removed and used in other computers. ■ When using the RAID-1 (mirroring) configuration, the OS recognizes the lesser capacity of the 2 hard disk drives. For example, if a 60 GB and an 80 GB hard disk drive are used in the mirroring configuration, the OS will recognize the capacity as a 60 GB hard disk drive. The additional 20 GB capacity (over the 60 GB hard disk drive) of the 80 GB hard disk drive cannot be used. ■ If a hard disk drive had been replaced, execute the rebuild command and rebuild the RAID-1 (mirroring) configuration. ■ Implementing the media checking schedule Media checks should be carried out regularly to ensure even more stable operation of the RAID configuration and to make it easier for maintenance and repair measures to be carried out in case of hard disk drive failures. For RAID-1 with data redundancy, if a hard disk drive failure occurs, the hard disk drive is replaced and its data reconstructed from the other hard disk drive which did not fail. If there are bad blocks, etc., in the hard disk drive that did not fail, it is possible that portion of data might not be recovered and system down might occur. An effective way to ensure that such situations do not happen is to carry out RAID-1 media checks regularly. The TOSHIBA RAID utility is set as default to carry out media checks every month on the third Wednesday from noon. User's Manual G-3