ProLiant DL740 Server Maintenance and Service Guide

Power and Media Module Removal and Replacement Procedures
When replacing hot-plug hard drives in a fault-tolerant configuration, follow these guidelines:
• Never remove more than one drive at a time. When a drive is replaced, the controller
uses data from the other drives in the array to reconstruct data on the replacement drive.
If more than one drive is removed, a complete data set is not available to reconstruct data
on the replacement drive.
• Never remove a working drive when another drive has failed. Drives that have been
failed by the controller are indicated by the amber Drive Failure LED on the drive tray.
Permanent data loss will occur if a working drive is removed while a failed drive is being
replaced.
• Never remove a drive while another drive is being rebuilt. An Online LED of a drive
will flash green while it is being rebuilt. A replaced drive is restored from data stored on
the other drives.
• Never turn a disk enclosure off while the initiator or controller is powered on or
active. Doing so can cause the initiator or controller to mark the drives as failed. This
action can result in permanent data loss.
• If a drive is replaced while the system is off, it might be necessary to rebuild the
replaced drive. Follow the instructions on the screen or the instructions outlined in the
system reference guide.
CAUTION: Pressing the F2 key will cause permanent data loss to the entire logical drive.
Press the F2 key only if all of the drives have been replaced or if complete data loss is
required.
NOTE: When a drive configured for fault tolerance is replaced, the replacement drive automatically
begins restoring when it is installed. When a drive is in the process of being restored, the Online LED
blinks green. The LED continues to flash until the drive is completely restored.
5-10 HP ProLiant DL740 Server Maintenance and Service Guide
HP CONFIDENTIAL Codename: Jethro Part Number: 270853-004 Last Saved On: 2/10/04 3:51 PM