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Chapter 9: Drive Management

NOTE:

An Enclosure Spare is one that is used to rebuild all logical drives

within the same enclosure. In configurations that span across multiple

enclosures, a Global spare may participate in the rebuild of a failed

drive that resides in a different enclosure. Using Enclosure Spare can

avoid disorderly locations of member disk drives if members reside in

different enclosures.

9.2.6 Rebuilding Logical Drives

Depending on whether or not there is a spare drive, rebuilding is initiated

automatically or must be started manually. In the presence of a spare

drive, the system automatically rebuilds onto the spare drive. This

process is done in the background, thus it is transparent to users.

However, you should replace the failed drive as soon as possible and

insert a new drive and set it as a spare just in case another drive fails and

you will need a backup drive.

In the absence of a spare drive, rebuilding must be initiated manually.

Before initiating a manual rebuild, you must first replace the failed drive.

If you install the replacement drive in the same drive slot (that is, the

same channel and ID), then you can proceed with the rebuilding process

by clicking on the Rebuild button; otherwise, you need to scan in the

drive first.

A failed drive should be replaced as soon as possible. For a RAID 3 or

RAID 5 array, two failed members will cause an irrecoverable loss of

data.

The controller/subsystem can be set to rescan the drive bus for a

replacement drive at preset intervals. The related setting can be found in

Configuration Parameters -> Other -> Drive Side Parameters -> Drive

Fail Swap Check Period in second.

Figure 9-14: Displaying the Rebuild Command Menu

9.2.7 Deleting an LD

If you want to delete an LD from your RAID subsystem, follow the steps

outlined below. Remember that deleting an LD results in all the data on

Logical Drive Management 9-17

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