Hard Drive Installation and Replacement

Procedure to Attempt Recovery

When fault tolerance has been compromised, inserting replacement drives does not improve the condition of the logical volume. Instead, if the screen displays unrecoverable error messages, try the following procedure to recover data.

1.Power down the entire system, and then power it back up. In some cases, a marginal drive will work again for long enough to allow you to make copies of important files.

2.If a 1779 POST message is displayed, press the F2 key to re-enable the logical volumes. Remember that data loss has probably occurred and any data on the logical volume is suspect.

3.Make copies of important data, if possible.

4.Replace any failed drives.

5.After the failed drives have been replaced, the fault tolerance may again be compromised. If so, cycle the power again. If the 1779 POST message is displayed, press the F2 key to re-enable the logical drives, recreate the partitions, and restore all data from backup.

To minimize the risk of data loss due to compromised fault tolerance, make frequent backups of all logical volumes.

Automatic Data Recovery

Automatic Data Recovery is an automatic background process that rebuilds data to a spare or replacement drive when another drive in the array fails. This process is also called rebuild.

If a drive in a fault-tolerant configuration is replaced while the system power is off, a POST message is displayed during the next system startup. This message prompts you to press the F1 key to start automatic data recovery. If automatic data recovery is not enabled, the logical volume remains in a ready-to-recover condition and the same POST message is displayed whenever the system is restarted.

When automatic data recovery has finished, the Online LED of the replacement drive stops blinking and begins to glow steadily.

HP Smart Array 641/642 Controller User Guide

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