NEC express5800 A2010b - Replacing a Hard Disk Drive in the RAID System (Auto Rebuild)

1. Installing / Removing Internal Options
Chapter 2 Preparations
Note the following points when building a RAID System.
• The number of hard disk drives required varies depending on RAID level.
RAID level
The minimum number of hard disk drives required
to build a RAID System
(when RAID Controller NE3303-/173/168/H001 is used)
RAID 0
1
RAID 1
2
RAID 5
3
RAID 6
3
RAID 10
4
RAID 50
6
RAID 60
6
• In the RAID System, all the hard disk drives must have the same capacity, interface type, and rotational
speed.
• If you intend to install the OS to the RAID System, first build the RAID system. For details, refer to Chapter 2
(3. RAID System Configuration) in "Maintenance Guide" or the manual supplied with the optional RAID
Controller (NE3303-/173/168/H001).
Important
• Do not let the system enter hibernate or standby state when RAID System is
configured.
• Build a Disk Array in the RAID System using hard disk drives that have the same
specifications (capacity, rotational speed, and standard).
1.8.4
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.
The disk is automatically rebuilt when hot swapping (replacing a disk while the power on) a failed hard disk drive
(except for RAID0).
During the auto rebuild, the DISK LED on the hard disk drive blinks green and amber alternately to indicate that
the auto rebuild is in progress.
Observe the following precautions when 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 blinks green and amber alternately).
Needed time for Rebuild
Here describes the sample time for Rebuild while few accesses to the HDDs in the system.The
more the accesses are, the more the time is.
Express5800/A1040b, A2040b, A2020b, A2010b User's Guide
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