Owner's manual

operation despite simultaneous failure of any 2 drives in the array, whereas RAID 4 and
RAID 5 can only sustain failure of a single drive.
◦ RAID 50—Distributed data guarding (RAID 5) with multiple parity groups.
◦ RAID 60—Advanced data guarding (RAID 6) with multiple parity groups.
◦ RAID 1 (ADM) - Advanced Data Mirroring—For each physical drive, there are two or
more physical drives containing identical data. If a drive fails, the data can be retrieved
from any of the mirrored drives.
◦ RAID 10 (ADM) - Advanced Data Mirroring with Striping—For each physical drive, there
are two or more physical drives containing identical data in addition to data being striped
across multiple drives. If a drive fails, the data can be retrieved from any of the mirrored
drives.
◦ Unknown—You may need to upgrade your software.
• Capacity—Displays the size of the logical drive.
• Accelerator—Indicates whether the logical drive has an Array Accelerator board configured
and enabled. The following values are valid:
◦ Enabled—The Array Accelerator board is configured and enabled for this logical drive.
◦ Disabled—The Array Accelerator board is configured but not enabled for this logical
drive.
◦ Unavailable—There is no Array Accelerator board configured for this logical drive.
◦ Unknown—The Storage Agents do not recognize the Array Accelerator board. You may
need to upgrade your software.
• Stripe Size—Displays the size of a logical drive stripe in kilobytes.
• Total Read and Write Requests—Displays the total number of read and write requests for the
logical volume, expressed in reads and writes per second.
• Reads—Displays the number of read requests for the logical volume, expressed in reads per
second.
• Writes—Displays the number of write requests for the logical volume, expressed in writes per
second.
• Sectors Read—Displays the number of sectors read for the logical volume for this interval. This
value is expressed in sectors per second.
• Sectors Written—Displays the number of sectors written for the logical volume for this interval.
This value is expressed in sectors per second.
• OS Assigned Name—Displays the operating system name associated with this logical drive.
• Multipath Status—Displays the overall multipath status of this logical drive. The following
values are valid:
◦ Not Configured—Indicates that this logical drive is not configured to have multipath
access.
◦ Redundant—Indicates that all disks of this logical drive currently have more than one I/O
path to the controller.
◦ Not Redundant—Indicates that all disks of this logical drive previously had more than
one I/O path to the controller but now one or few of them have no redundant I/O path.
• Number Of Parity Groups—Indicates the number of parity groups (i.e. RAID 4/5/6
subvolumes), that are being striped across.
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