HP Insight Management Agents - Manual (Page 51)

— Shutdown—Indicates that the drive array enclosure that contains the logical drive has
overheated. The logical drive is no longer functioning.
— Transforming—Indicates that the logical drive is currently undergoing a transformation
(expansion, shrinkage or movement). During transformation, fault tolerance algorithms
redistribute logical drive data according to the transformation operation selected.
— Not available—Indicates that the logical drive is currently unavailable. If a logical drive
is expanding and the new configuration frees additional disk space, this free space can
be configured into another logical volume. If this is done, the new volume is set to not
available.
— Queued for transformation—Indicates that the logical drive is ready for transformation
(expansion, shrinkage or movement). The logical drive is in the queue for transformation.
— Multipath access degraded—Indicates that all the physical drives in the logical drive
were previously accessible by at least two paths, but now at least one physical drive
within that logical drive is accessibly by only a single path due to a hardware fault or
a hardware configuration change (e.g. mistakenly replacing a dual ported drive with
a single ported drive.)
— Erasing—Indicates that the logical drive is currently being erased.
— Unknown—You may need to upgrade your software.
• Rebuilding Drive—Identifies the physical drive that failed. The logical drive is rebuilding
using a spare drive in place of this failed drive.
When the status is Expanding one of the following values displays to indicate the progress
of the expansion.
— Percent Expand Complete—Displays the percent complete of the expansion. When a
logical volume is expanding, the drive must redistribute the logical volume data across
the physical drives. When the value reaches 100, the expansion process is complete.
— Expand Blocks Left—Displays the number of blocks of data that still need to be
redistributed. When the value reaches 0, the expansion process is complete. The array
continues to operate normally while the drive is expanding.
• Fault Tolerance—Displays the fault tolerance mode of the logical drive. To change the fault
tolerance mode, run the Array Configuration Utility.
The following values are valid for the Logical Drive Fault Tolerance:
— None—(RAID 0) fault tolerance is not enabled. If a physical drive reports an error, the
data cannot be recovered by the Drive Array.
— Mirroring—(RAID 1/RAID 0+1) is the highest level of fault tolerance. It is the only
method offering fault tolerance protection if no more than two physical drives are
selected. Drive mirroring creates fault tolerance by storing duplicate data on two drives.
There must be an even number of drives. This is the most costly fault tolerance method
because it requires 50 percent of the drive capacity to store the redundant data.
— Data Guarding—(RAID 4) assures data reliability while using only a small percent of
the logical drive storage capacity. A designated, single physical drive contains parity
data. If a drive fails, the controller uses the data on the parity drive and the data on the
remaining drives to reconstruct data from the failed drive. This allows the system to
continue operating with slightly reduced performance until you replace the drive.
— Distributed Data Guarding—(RAID 5) stores parity data across all the physical drives
in the array and allows more simultaneous read operations and higher performance
than data guarding (RAID 4). If a drive fails, the controller uses the parity data and the
data on the remaining drives to reconstruct data from the failed drive. The system then
continues operating with a slightly reduced performance until you replace the failed
drive.
— Advanced Data Guarding—(RAID 6) is the fault tolerance method that provides the
highest level of data protection. It stripes data and parity across all the physical drives
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