NEC Express 5800 120Eg, User Manual

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120Eg User Guide - System Overview
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Automatic Rebuilding Function
The server supports the disk array automatic rebuilding function for data recovery.
Note: The automatic rebuilding function supports RAID lev-
els 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.
Hot Swapping (Redundant hot-swap system only)
Hot swapping allows a device to be replaced, such as a hard disk drive while its power
is on, as listed below.