Users Guide
To verify redundant information of a virtual disk:
1. Locate the controller on which the virtual disk resides in the tree view. Expand the controller object until the Virtual Disks object
is displayed.
2. Select the Check Consistency task from the virtual disk’s Tasks drop-down list box and click Execute.
Rebuilding Redundant Information
Does my controller support this feature? See Supported Features.
If you have a redundant virtual disk, you can reconstruct the contents of a failed physical disk onto a new disk or a hot spare. A
rebuild can take place during normal operation, but it degrades performance.
Related links
Replacing A Failed Disk
Setting The Rebuild Rate
A Rebuild Does Not Work
Managing Virtual Disk Bad Block Management
Virtual disk bad blocks are bad blocks on one or more member physical disks. The read operation on the virtual disks having bad
blocks may fail.
Storage Management generates a critical alert (2387) to notify you of the bad blocks on the virtual disk.
Virtual disk bad blocks are discovered when the controller performs any operation that requires scanning the disk. Examples of
operations that may result in this alert are:
• Consistency check
• Rebuild
• Virtual disk format
• I/O
• Patrol Read
Recovering a physical disk bad block depends on the RAID level and state of the virtual disk. If a virtual disk is redundant, the
controller can recover a bad block on a physical disk. If a virtual disk is not redundant, then the physical disk bad block results in a
virtual disk bad block.
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.
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