Software Support
RAID Level Virtual Disk State Scenario Result
another physical location.
The problem is resolved.
RAID 5 Degraded One bad block on a physical
disk.
The controller cannot
regenerate data from the
peer disks because one
drive is missing. This results
in a virtual disk bad block.
RAID 5 Ready One bad block on two
physical disks at the same
location.
The controller cannot
regenerate data from the
peer disks. This results in a
virtual disk bad block.
RAID 6 Partially degraded (one
failed/missing physical disk)
One bad block on a physical
disk.
The controller regenerates
data from the peer disks
and sends a Write to the
bad block. The disk then
remaps the LBA to another
physical location. The
problem is resolved.
RAID 6 Degraded (two failed/
missing physical disks)
One bad block on a physical
disk.
The controller cannot
regenerate data from the
peer disks. This results in a
virtual disk bad block.
RAID 6 Ready One bad block on a physical
disk.
The controller regenerates
data from peer disks and
sends a Write to the bad
block. The disk then remaps
the Logical Block
Addressing (LBA) to
another physical location.
The problem is resolved.
Recommendations For Clearing Bad Blocks
Storage Management allows you to clear the bad block warnings. To clear bad blocks, the following procedure is
recommended:
1. Perform a backup of the virtual disk with the Verify option selected.
One of the following scenarios may occur:
– Backup operation fails on one or more files. In this case, restore the file from a previous backup. After
restoring the file, proceed to step 2.
– Backup operation completes without error. This indicates that there are no bad blocks on the written
portion of your virtual disk.
If you still receive bad block warnings, the bad blocks are in a non-data area. Proceed to step 2.
2. Run Patrol Read and check the system event log to ensure that no new bad blocks are found.
If bad blocks still exist, proceed to step 3. If not, the condition is cleared without the need for step 3.
3. To clear these bad blocks, execute the Clear Virtual Disk Bad Blocks task.
This Clear Virtual Disk Bad Block feature is applicable to PERC H310 Adapter, PERC H310 Mini Monolithic, PERC
H310 Mini Blades, PERC H700, PERC H710 Adapter, PERC H710 Mini Blades, PERC H710 Mini Monolithic, PERC
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