NEC R120d-1E N8100-1955F User Manual page 120

Chapter 2 Preparations
1.18.3 Replacing a Hard Disk Drive in the RAID System (Auto Rebuild)
In the RAID System, you can use the auto rebuild feature to restore data back to the state before a 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 logic drives set to RAID 1, RAID 5, RAID 6, RAID 10.
The disk is automatically rebuilt when hot swapping (replacing a disk while the power 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 the autorebuild is being performed.
Observe the following precautions whenever executing the auto rebuild
•
Do not turn off the server until the auto build 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).
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Express5800/R120d-1E User's Guide
1. Installing Internal Optional Devices