NEC Express5800 series User Manual page 181

devices connected, see the manuals provided with the disk array controller and disk expansion
unit.
IMPORTANT:
drives. You need to purchase hard disk drives separately.
After connecting the disk expansion unit, use the RAID configuration utility in the chip on the
board to set the disk expansion unit in a RAID5 disk array configuration. For details on settings
and the setting methods, see the online document in the Administration/Management CD
provided with the NEC Storage NS or the manual provided with the board.
While a disk expansion unit is set in a disk array configuration, you can use the "Auto Rebuild"
feature of the disk array controller to restore data damaged if one of the hard disk drives
installed in the disk expansion unit fails. (Replace the failing hard disk drive while the power is
on. (Hot swapping))
A disk expansion unit is provided with no hard disk
Upgrading Your NEC Storage 171