Cause
The Windows host does not recover from the disconnection in time and loses all paths to the volume. Extend
the time that the host continues to retry the connection by modifying the
LinkDownTime
registry key, so that
it has enough time to recover the paths.
LinkDownTime
determines how long requests will be held in the
device queue and retried if the connection to the target is lost. The default value is 15 seconds.
Action
Procedure
1.
Change the Windows Registry setting for the default
LinkDownTime
to 120 seconds
NOTE:
Back up your registry before changing it.
1.
Run
regedit.exe
.
2.
Navigate to
HKLM\SYSTEM\CurrentControlSet\Control\Class\{4D36E97B-E325-11CE-
BFC1-08002BE10318}\
<Instance Number>
\Parameters
.
3.
Double-click
LinkDownTime
in the right-hand pane.
The
Edit DWord Value
window opens.
4.
Enter a value of 120.
5.
Click
OK
.
6.
Save your changes and exit the Registry.
7.
Reboot the system.
RAID array remains degraded after hot spares rebuild
Symptom
After a disk drive fails and the disk drive designated as the hot spare is rebuilt, RAID remains in a degraded
state.
Cause
The RAID configuration remains degraded until the failed drives are replaced and the new drives rebuild.
Action
Procedure
1.
Replace the failed drives. After the new drives rebuild, the degraded state clears.
Servicing controller incorrectly presented in the SVMC
Symptom
A RAID device is owned by only one controller in the storage system. This servicing controller may be
incorrectly presented in the SVMC.
Cause
The misreporting of the servicing controller can happen if all three following conditions are met:
• RAID has been configured
• A management group has not been created yet
• One of the storage controllers fails
RAID array remains degraded after hot spares rebuild
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