Users Guide

RAID Level Virtual Disk State Scenario Result
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 les. In this case, restore the le from a previous backup. After restoring the le,
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 H330 Adapter, PERC H330 Mini Monolithic, PERC H730
Adapter, PERC H730 Mini Monolithic, PERC H730P Adapter, PERC H730P Mini Monolithic, PERC H740P Adapter, PERC
H740P Mini Monolithic, and PERC H840 Adapter.
Virtual Disk Properties And Tasks
Use the virtual disk properties and tasks window to view information about the virtual disks and execute virtual disk tasks.
From the Options menu:
Refresh Partitions: Click to refresh the Virtual Disk Partitions data once the partition is created using the operating system
commands for the available virtual disks.
Go to the Create Virtual Disk Wizard: Launches the Create Virtual Disk Wizard.
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