APC 15000 RAID Smart Command, Manual Drive Rebuild, Drive Rebuild Verify, Manual Drive Replace

Controller Management

Use the TIER command to display the current setting (Figure 3–26).The rebuild operation can take up to several hours to complete, depending on the size of the disk and rate of rebuild.

15000 [1]: tier

	Tier Status
Capacity	Space Available
Tier Owner (Mbytes)	(Mbytes)	Disk Status	Lun List

-------------------------------------------------------------------

1	280012	280012	ABCDEFGHPS
2	280012	280012	ABCDEFGHPS
3	280012	280012	ABCDEFGHPS
Automatic disk	rebuilding is Enabled
System rebuild	extent: 32 Mbytes
System rebuild	delay: 60

System Capacity 840036 Mbytes, 840036 Mbytes available.

Figure 3–26Automatic Disk Rebuilding Parameter

TIER AUTOREBUILD=ONOFF enables/disables the automatic disk rebuild function. A disk will only be replaced by a spare disk if it fails and Autorebuild is ON (ON being the default setting). This function should always be enabled so that data can be reconstructed on the spare drive when a drive failure occurs. After the failed drive is replaced, data will be automatically copied from the spare drive to the replacement drive.

3.2.10.1Manual Drive Rebuild

DISK REBUILD=<tier><channel> initiates a rebuild on a specific drive. This operation will reconstruct data on the replacement drive and restore a degraded LUN to healthy status.

3.2.10.2Drive Rebuild Verify

DISK REBUILDVERIFY=ONOFF determines if the system will send SCSI Write with Verify commands to the disks when rebuilding failed disks. This feature is used to guarantee that the data on the disks is rebuilt correctly. Default is OFF. This feature will increase the time it takes for rebuilds to complete.

3.2.10.3Manual Drive Replace

To replace the specified failed drive with a spare drive, enter: DISK REPLACE=<tier><channel>

A Replace operation is used to temporarily replace a failed disk with a healthy spare disk.

3.2.10.4Interrupting a Rebuild Operation

To interrupt a Rebuild operation, use these commands:

•TIER PAUSE pauses the current rebuild operations.

•TIER RESUME releases the paused rebuild operations.

•TIER STOP aborts all the current rebuild operations.

3.2.11SMART Command

Use the SMART command to identify failing drives before they fail.

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