Replacing a Hard Disk Used for a RAID 1, RAID 5, or RAID 10 Logical

For preventive replacement, use a hard disk of the same model (with the same capacity and speed) as the likely-to-fail disk as a rule.

5.2.1 Checking Applicability of Redundancy

Perform the following procedure to check whether the array system including the hard disk targeted for preventive replacement is redundant.

1 Right-click and select the logical drive icon displayed in the [Logical Drives] field in the [Controller View] window of GAM.

The icons of the hard disks composing the logical drive appear in white.

Right-clicking the logical drive icon again returns the display to its original status.

2 Check all the hard disks included in each logical drive.

3 Determine which logical drive uses the hard disk targeted for preventive replacement.

4 Check the RAID level of the logical drive.

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5.2.2 Replacing a Hard Disk Used for a RAID 0 Logical Drive

If a hard disk targeted for preventive replacement is used for a RAID 0 logical drive, the RAID configuration must be reconfigured and the data must be restored.

Perform preventive replacement of the hard disk according to the following procedure.

1 Back up all data.

2 Check the channel and ID of the hard disk indicated as likely to fail (Critical) by using Disk Drive Information of GAM.

For more details, refer to "4.6.3 Viewing Hard Disk Information" (pg.108).

The hard disk that has received a failure prediction warning is displayed with the following icon.

If any other failed hard disk exists at this point, replace it following the procedures described in "5.1 Replacing a Hard Disk" (pg.120). Also, if any hard disk is being rebuilt, wait until the process completes. After its completion, check the hard disk indicated as likely to fail (Critical) by using Disk Drive Information.

3 Restart the server and start WebBIOS to select the array controller to which the hard disk targeted for preventive replacement is connected.

4 Select [Configuration Wizard] → [Clear Configuration] and then click [Next].

When the following warning message appears, click [Yes].

The [Configuration Preview] window appears.

5 Turn off the server and replace the likely-to-fail hard disk with a new one.

6 Create an array configuration using WebBIOS and restore the backup data.

This is Destructive Operation!

Original configuration and data will be lost.

Select Yes, if desired so.

Executing Clear Configuration deletes all data.

5.2.3 Replacing a Hard Disk Used for a RAID 1, RAID 5, or RAID 10 Logical Drive

If the server supports the onboard SCSI array controller, it is possible to replace a hard disk without turning off the server.

1 Check the channel and ID of the hard disk indicated as likely to fail (Critical) by using Disk Drive Information of GAM.

For more details, refer to "4.6.3 Viewing Hard Disk Information" (pg.108).

The hard disk that has received a failure prediction warning is displayed with the following icon.

If any other failed hard disk exists at this point, replace it following the procedures described in "5.1 Replacing a Hard Disk" (pg.120). Also, if any hard disk is being rebuilt, wait until the process completes. After its completion, check the hard disk indicated as likely to fail (S.M.A.R.T.) by using Disk Drive Information.

2 Double-click the icon of the likely-to-fail hard disk by GAM to confirm that its "Status" indicates "Critical."

3 Press the [Make Offline] button. When the [WARNING] window appears, enter "YES" and press the [OK] button.

If any hot spare disks are set, rebuilding is started automatically. Wait until rebuilding is completed.

4 Make sure that the Fault LED corresponding to the likely-to-fail hard disk is lit.

5 Confirm that the following log is displayed in Log Information Viewer of GAM.

If the likely-to-fail hard disk is used for the RAID 0 logical drive, the following procedure cannot be applied to perform preventive replacement.

It is recommended to back up data before executing preventive replacement of a hard disk.

When two or more hard disks are expected to fail, perform preventive replacement of one disk at a time.

Event ID : S-12

Description : A physical disk has failed.

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6 Pull out the plastic lever 90 degrees towards you, and also pull out the likely-to-fail hard disk unit 1 to 3cm to disconnect it from the SCSI bus.

Do not pull out the hard disk unit completely from the server at this point.

7 Wait 1 minute or more.

8 Pull out the likely-to-fail hard disk from the hard disk bay.

9 Install a new hard disk in the hard disk bay where the likely-to-fail hard disk was previously installed.

10 Check the following.

• If any spare disk had been set

A short while after installing a new hard disk, it automatically becomes a spare disk. Make sure that the status of the hard disk has changed to "Hot Spare" using Disk Device Information of GAM.

• If no spare disk had been set

A short while after installing a new hard disk, rebuilding is started automatically on the installed hard disk. When rebuilding is started, the Fault LED corresponding to the hard disk that was lit starts to blink, and turns off after rebuilding is completed. After its completion, make sure that the status of the hard disk has changed to "OnLine" using Disk Device Information of GAM.

Appendix

A RAID Level . . . 128 B List of GAM Error Codes . . . 132

128

A ^{RAID Level}