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Sas logical drive – HP Insight Management Agents User Manual

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—This symbol indicates that the drive is a hot plug drive.

Disk Type indicates the type of disk drive. The following values are valid:
— SAS—The disk is a serial SCSI disk drive.
— SATA—The disk is a Serial ATA disk drive.
— Unknown—The Storage Agents cannot determine the disk type.

SAS Address displays the SAS address assigned to this disk drive. This item can be used
for identification purposes.

Rotational Speed indicates the rotational speed of the drive in revolutions per minute.

Used Reallocs displays the number of sectors of the reallocation area that have been used
by the physical drive.

OS Assigned Name displays the operating system name associated with this disk drive.

SAS Logical Drive

Select a SAS logical drive from the SAS host bus adapter submenu to display the following
information:

Status shows the status of the physical drive selected.
— OK—The logical drive is in normal operation mode. No user action is required.
— Degraded—The logical drive is in a degraded state.
— Failed—There are more failed physical drives than the fault tolerance mode of the logical

drive can handle without data loss.

— Offline—The logical drive is offline and cannot be accessed by the operating system.

User action may be required to bring the drive back online.

— Unknown—The Storage Agents cannot determine the status of this drive. You may

need to upgrade your driver software or Storage Agents.

Raid Level displays the raid configuration of the logical drive. The possible values are:
— RAID 0–Fault tolerance is not enabled. If a physical drive reports an error, the data

cannot be recovered.

— RAID 1– Mirroring 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.

— Unknown—The Storage Agents cannot determine the raid configuration of this logical

drive. You may need to upgrade your driver software or Storage Agents.

Capacity displays the size of the logical drive. A megabyte (MB) is 1,048,576 bytes, a gigabyte
(GB) is 1,073,741,824 bytes, and a terabyte (TB) is a thousand gigabytes.

Drive manufacturers sometimes use the number 1,000,000 as a megabyte when giving drive
capacities so this value may differ from the advertised size of a drive.

Stripe Size The size of a logical drive stripe or group of data written to a physical drive in
kilobytes. It may be zero in some raid configurations.

OS Assigned Name displays the operating system name associated with this logical drive.

When the status is Rebuilding the following will be displayed to indicate the progress of
the operation.

— Percent Rebuild Complete displays the percent complete of the rebuild. When the value

reaches 100, the rebuilding process is complete. The drive array continues to operate
in interim recovery mode while the drive is rebuilding.

— Rebuilding Drive identifies the physical drive that failed. The logical drive is rebuilding

using a spare drive in place of this failed drive.

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