User's Manual

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Exceptions for Reconfiguring a Concatenated Virtual Disk on CERC SATA1.5/6ch and CERC SATA1.5/2s
Controllers
You can create a concatenated virtual disk by performing a Split Mirror or an Unmirror on a RAID 1-concatenated virtual disk. After you have done so, however,
the resulting concatenated virtual disks cannot be subjected to any further modification. You cannot reconfigure or add disks to the resulting concatenated
virtual disks.
Maintain Integrity of Redundant Virtual Disks
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Does my controller support this feature? See Supported Features.
The virtual disk Check Consistency task verifies the accuracy of the redundant (parity) information. This task only applies to redundant virtual disks. When
necessary, the Check Consistency task rebuilds the redundant data.
To verify a virtual disk's redundant information:
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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.
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2. Select the Check Consistency task from the virtual disk's drop-down menu and click Execute.
Rebuilding Redundant Information
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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. The following sections provide additional information on rebuilding disks.
l Replacing a Failed Disk describes how to replace a failed physical disk and initiate a rebuild.
l Set Rebuild Rate describes how to set the rebuild rate on selected controllers.
l A Rebuild Does Not Work describes situations in which a rebuild does not work.
Virtual Disk Bad Block Management
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What is a Virtual Disk Bad Block?
Virtual disk bad blocks are due to bad blocks on one or more member physical disks. 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:
l Consistency check
l Rebuild
l Virtual disk format
RAID 6 requires a minimum of 4 disks.
RAID 5
RAID 0
With or without adding additional disks
RAID 5
RAID 5, RAID 6
Add at least one additional disk.
RAID 6 requires a minimum of 4 disks.
RAID 6
RAID 0, RAID 5
With or without adding additional disks
RAID 6
RAID 6
Add at least one additional disk
SAS 6/iR
N/A
N/A
N/A
PERC S100, S300
RAID 0
RAID 0
With or without additional disks
RAID 1
RAID 1
Without additional disks
RAID 5
RAID 5
With or without additional disks
RAID 10
RAID 10
Without additional disks