Automatic Rebuilding Function; Expand Capacity Function - NEC Express5800 series User Manual

Automatic Rebuilding Function

The server supports the disk array automatic rebuilding function for data recovery.
Note: The automatic rebuilding function supports RAID levels
RAID1 or RAID5.
Rebuilding is to regenerate all data from a failed disk to a replacement disk. A rebuild is
necessary after a failed disk drive is replaced with a new one.
With RAID levels RAID1 or RAID5 the failed disk does not affect the operation.
However, if another disk error occurs before automatic rebuilding is complete, the data
may be destroyed.
In a conventional server, the user must select and execute rebuilding using various
utilities. This server executes rebuilding automatically. Since the server also supports
hot-swapping function, the failed disk can be replaced while the power is on.
Observe the following when using an automatic rebuilding function.
!
Do not turn the power off. If power is turned off, automatic rebuilding will not start.
!
Use an interval of 60 seconds or more between mounting and dismounting the hard
disk drive.
!
If a hard disk is being rebuilt, do not replace the hard disk.

Expand Capacity Function

Disk capacity can be expanded by adding a disk drive while the system is running. This
function is only supported if the server is in the disk array configuration mode.
This function does not utilize operations such as data backup, pack reconfiguration,
initialization, restoring the data or reconfiguring the partitions on the drive.
If a hard disk is added under the operation of the Global Array Manager, perform the
following.
!
After the hard disk is installed, wait for about 60 seconds and click the Scan Device
key. Clicking the Scan Device key after the execution of the expand array operation,
will display the added disk correctly.
System Overview 1-21