User's Manual

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 will degrade 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 will not work.
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Virtual Disk Properties and Tasks
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Use this window to view information about the virtual disks and execute virtual disk tasks.
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Virtual Disk Properties
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The virtual disk properties can vary depending on the model of the controller. Virtual disk properties may include:
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Property
Definition
Status
These icons represent the severity or health of the storage component.
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 Normal/OK
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Warning/Non-critical
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Critical/Fatal
See "Storage Component Severity" for more information.
Name
This property displays the virtual disk name.
State
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This property displays the current status of the virtual disk. Possible values are:
Ready — The virtual disk is functioning normally.
Degraded — A physical disk in a redundant virtual disk is not online.
Resynching — A consistency check is being performed on the virtual disk.
Resynching Paused — A consistency check has been paused on the virtual disk.
Regenerating — A physical disk in the virtual disk is rebuilding.
Reconstructing — The virtual disk configuration has changed. The physical disks included in the virtual disk are being modified to support the
new configuration.
Failed — The virtual disk has encountered a failure of one or more components and is no longer functioning.
Failed Redundancy — This state is displayed when the initial consistency check for the virtual disk is cancelled or is not successful. This state
may also be displayed when a RAID 1, RAID 10 or RAID 1-concatenated virtual disk suffers a physical disk failure. In addition, there are other
conditions related to disk failures and the firmware that can cause a virtual disk to display a Failed Redundancy state.
Background Initialization — A background initialization is being performed on the virtual disk.
On some controllers, the virtual disk state is not updated until the controller performs an I/O operation.
Degraded Redundancy — This state is applicable to RAID 6 only in which a physical disk in a redundant virtual disk is not online, but the
virtual disk is still accessible and functioning.
Layout
This property displays the RAID level.
Size
This property displays the total capacity of the virtual disk.
The algorithm for calculating the virtual disk size rounds a value of 0.005 or less down to 0.00 and a value between 0.006 and 0.009 up to
0.01. For example, a virtual disk size of 819.725 will be rounded down to 819.72. A virtual disk size of 819.726 will be rounded up to 819.73.
Device
Name
This property displays the operating system device name for this object.
Bus
Protocol
This property displays the technology that the physical disks included in the virtual disk are using. Possible values are:
SAS — Serial Attached SCSI
SATA — Serial Advanced Technology Attachment (SATA)
Media
This property displays the media type of the physical disks present in the virtual disk. The possible values are:
HDD—Hard Disk Drive. A HDD is a non-volatile storage device which stores digitally-encoded data on rapidly rotating platters with magnetic