Dell PowerEdge T140 EMC PowerEdge Servers Troubleshooting Guide - Page 92

Virtual disk troubleshooting, To locate view Check Consistency report in Storage Management

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Pausing a Check Consistency The Pause Check Consistency task pauses a check consistency while it is in progress. NOTE: The Pause Check Consistency task updates the virtual disk State property to Resynching Paused immediately. The Progress property may continue to increment for up to three seconds. This time delay occurs because the polling task may take up to three seconds to query the task information and update the display. Resuming a Check Consistency The Resume Check Consistency task resumes check consistency after it has been paused. To locate view Check Consistency report in Storage Management: 1 In the Server Administrator window, under the system tree, click Storage. 2 Select View Check Consistency Report from the Select Report drop-down menu. 3 Click Execute. To locate view Check Consistency report in Storage Management 1 In the Server Administrator window, under the system tree, click Storage. 2 Select View Check Consistency Report from the Select Report drop-down menu. 3 Click Execute. Virtual disk troubleshooting Rebuilding of virtual disk does not work Rebuilding of virtual disk does not work in the following situations: • The virtual disk is non redundant - For example, a RAID 0 virtual disk cannot be rebuilt because RAID 0 does not provide data redundancy. • There is no hot spare assigned to the virtual disk - As long as the virtual disk is redundant, to rebuild it: - Remove the failed physical disk and replace it. A rebuild automatically starts on the new disk. - Assign a hot spare to the virtual disk and then perform a rebuild. • You are attempting to rebuild onto a hot spare that is too small - Different controllers have different size requirements for hot spares. • The hot spare is unassigned from the virtual disk - This occurs on some controllers if the hot spare is assigned to more than one virtual disk and is being used to rebuild a failed physical disk for another virtual disk. • The virtual disk includes failed or corrupt physical disks - This situation may generate alert 2083. For information on alert messages, see the Server Administrator Messages Reference Guide at Dell.com/support/home. • The rebuild rate setting is too low - If the rebuild rate setting is quite low and the system is processing a number of operations, then the rebuild may take an unusual amount of time to complete. • The rebuild is canceled - Another user can cancel a rebuild that you have initiated. Rebuilding of virtual disk completes with errors About this task A rebuild completes with errors when a portion of the disk containing redundant (parity) information is damaged. The rebuild process can restore data from the healthy portions of the disk but not from the damaged portion. 92 Troubleshooting hardware issues

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Pausing a Check Consistency
The Pause Check Consistency task pauses a check consistency while it is in progress.
NOTE:
The Pause Check Consistency task updates the virtual disk State property to Resynching Paused immediately. The
Progress property may continue to increment for up to three seconds. This time delay occurs because the polling task may take
up to three seconds to query the task information and update the display.
Resuming a Check Consistency
The Resume Check Consistency task resumes check consistency after it has been paused.
To locate view Check Consistency report in Storage Management:
1
In the
Server Administrator
window, under the system tree, click
Storage
.
2
Select
View Check Consistency Report
from the
Select Report
drop-down menu.
3
Click
Execute
.
To locate view Check Consistency report in Storage Management
1
In the
Server Administrator
window, under the system tree, click
Storage
.
2
Select
View Check Consistency Report
from the
Select Report
drop-down menu.
3
Click
Execute
.
Virtual disk troubleshooting
Rebuilding of virtual disk does not work
Rebuilding of virtual disk does not work in the following situations:
•
The virtual disk is non redundant — For example, a RAID 0 virtual disk cannot be rebuilt because RAID 0 does not provide data
redundancy.
•
There is no hot spare assigned to the virtual disk — As long as the virtual disk is redundant, to rebuild it:
–
Remove the failed physical disk and replace it. A rebuild automatically starts on the new disk.
–
Assign a hot spare to the virtual disk and then perform a rebuild.
•
You are attempting to rebuild onto a hot spare that is too small —
Different
controllers have
different
size requirements for hot spares.
•
The hot spare is unassigned from the virtual disk — This occurs on some controllers if the hot spare is assigned to more than one
virtual disk and is being used to rebuild a failed physical disk for another virtual disk.
•
The virtual disk includes failed or corrupt physical disks — This situation may generate alert 2083. For information on alert messages,
see the
Server Administrator Messages Reference Guide
at
Dell.com/support/home
.
•
The rebuild rate setting is too low — If the rebuild rate setting is quite low and the system is processing a number of operations, then
the rebuild may take an unusual amount of time to complete.
•
The rebuild is canceled — Another user can cancel a rebuild that you have initiated.
Rebuilding of virtual disk completes with errors
About this task
A rebuild completes with errors when a portion of the disk containing redundant (parity) information is damaged. The rebuild process can
restore data from the healthy portions of the disk but not from the damaged portion.
92
Troubleshooting hardware issues