Replacing A Hard Disk Drive In The Raid System - NEC Express5800 Series User Manual

Chapter 2 Preparations

Replacing a Hard Disk Drive in the RAID System

1.13.3
In the RAID System, you can use the auto rebuild feature that can restore the data back to the state before
the failure occurred by writing the data saved before the replacement to a new Hard Disk Drive after
replacing the broken Hard Disk Drive.
The auto rebuild feature is enabled in Logical Drives set to RAID 1, RAID 5, RAID 6, RAID 10, and RAID 50.
The disk is automatically rebuilt when hot swapping (replacing a disk while the power is on) a failed Hard
Disk Drive.
During the auto rebuild, the DISK LED on the Hard Disk Drive flashes green and amber alternately to
indicate that auto rebuild is being performed.
Observe the following precautions whenever executing auto rebuild.
• Do not turn off the server until auto rebuild completes after a Hard Disk Drive fails.
• Leave an interval of at least 90 seconds between a Hard Disk Drive removal and a Hard Disk Drive
installation.
• Do not replace a disk during the auto rebuilding of another Hard Disk Drive (during an auto rebuild, the
DISK LED on the Hard Disk Drive flashes green and amber alternately).
Express5800/R110e-1E User's Guide
1. Installing Internal Optional Devices
93