User's Manual

Table 33. Sample Scenarios For Virtual Disk Bad Blocks
RAID Level Virtual Disk State Scenario Result
RAID 0 Degraded One bad block on a
physical disk.
The controller cannot
regenerate data from
the peer disks as there is
no redundancy. This
results in a virtual disk
bad block.
RAID 5 Ready 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 Logical Block
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
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