Users Guide

RAID Level Virtual Disk State Scenario Result
Addressing (LBA) to
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.
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