HP 166207-B21 Smart Array 5300 Controller User Guide - Page 122

Hard Drive Installation and Replacement • The amount of I/O activity occurring during the rebuild operation • The disk drive speed • The number of drives in the array (for RAID 5 and RAID ADG) For example, the rebuild time when using 9-GB Wide-Ultra hard drives in a RAID 5 configuration varies from ten minutes per gigabyte (for three drives) to 20 minutes per gigabyte (for 14 drives). Failure of Automatic Data Recovery If the Online LED of the replacement drive stops blinking during automatic data recovery, there are three possible causes: • If the Online LED is glowing continuously, automatic data recovery was successful and has finished. • If the amber failure LED is illuminated or other LEDs go out, the replacement drive has failed and is producing unrecoverable disk errors. Remove and replace the failed replacement drive. • If the automatic data recovery process has abnormally terminated, one possible cause is a non-correctable read error on another physical drive. The system may temporarily become operational if rebooted. In any case, locate the faulty drive, replace it, and restore data from backup. General Aspects of Drive Replacement Before replacing a degraded drive, use Compaq Insight Manager to examine the error counters recorded for each physical drive in the array to confirm that such errors are not presently occurring. Refer to the Compaq Insight Manager documentation on the Compaq Management CD for details. CAUTION: Sometimes, a drive that has previously been failed by the controller may seem to be operational after the system is power-cycled, or (for a hot-pluggable drive) after the drive has been removed and reinserted. However, continued use of such marginal drives may eventually result in data loss. Replace the marginal drive as soon as possible. E-6 Compaq Smart Array 5300 Controller User Guide