User's Manual

Hard Drive Installation and Replacement
HP Smart Array 641/642 Controller User Guide E-5
HP CONFIDENTIAL
Writer: John Turner File Name: m-appe hard drive installation & replacement
Codename: darkmatter - antimatter Part Number: 309311-001 Last Saved On: 11/7/02 5:07 PM
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.