When Operating A Raid System - NEC Express5800 Maintenance Manual

Chapter 1 Maintenance
5.6

When Operating a RAID System

[?] Unable to rebuild Hard Disk Drive

Is the capacity of the Hard Disk Drive to be rebuilt enough?
→ Use a Hard Disk Drive with the same capacity as that of the faulty Hard Disk Drive.

Is the Logical Drive RAID0?
→ RAID0 cannot be rebuilt because it has no redundancy. Replace the failed Hard Disk Drive, recreate the
configuration information, initialize it, and recover the drive using backup data.
[?] Fails to automatically rebuild the Hard Disk Drive

Did you secure sufficient time for replacing the Hard Disk Drive (hot swap)?
→ To make auto-rebuild work, secure at least 90 seconds from when a Hard Disk Drive is removed to when
the drive is installed.
[?] The Hard Disk Drive failed
→ Contact the maintenance service company with which you signed up or the dealer where you purchased
the product.
[?] Unable to perform Consistency Check

Is the Logical Drive Critical or Degraded?
→ Replace the failed Hard Disk Drive with new one, and then perform Rebuild.

Is RAID0 configured for the Logical Drive?
→ RAID0 has no data redundancy, and therefore, Consistency Check is disabled in the RAID0
configuration.
[?] Cannot set Write-Back for Cache Mode
→ The current cache of RAID Controller is displayed on Virtual Disks – Properties – Policies – Write on
WebBIOS. If an extra battery is faulty, is not connected, or insufficiently charged, the Cache Mode is
changed to WThru (Write Through) even if you specify WBack (Write Back). For the description of the
Cache Mode, refer to Chapter 2 (3. RAID System Configuration).
[?] Extra battery NE3303-153 is not recognized or the following message is displayed on POST
The battery hardware is missing or malfunctioning, or the battery is
unplugged, or the battery could be fully discharged.
If you continue to boot the system, the battery-backed cache will not
function.
If battery is connected and has been allowed to charge for 30 minutes and
this message continues to appear, then contact technical support for
assistance.
Press 'D' to disable this warning (if your controller does not have a battery).

Are the cable between the battery pack and battery board and the control cable between the battery board
and battery connector connected correctly?
→ Connect the cables properly.

Is this message displayed just after the battery is connected?
→ If the battery charging status is low, the battery may not be recognized. If the battery is not recognized
although 24 hours has passed, restart the system once.
If the battery is still not recognized although the above action has been taken, the extra battery may be
faulty. Contact your service representative.
Express5800/A1040b, A2040b, A2020b, A2010b Maintenance Guide
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5. Troubleshooting