Owner manual

Agent information 48
• Recovered Write Errors—Displays the number of write errors corrected through physical drive retries or
recovered by a physical drive on a monitored system. Over time, a drive may produce these errors. If you
notice an increase in the value shown for Recovered Write Errors or Hard Write Errors, a problem may exist
with the drive.
The Recovered Write Errors value increases every time the physical drive detects and corrects an error. Only an
unusually rapid increase in these errors indicates a problem. On average, these errors should occur less
frequently than read errors.
• Hot-Plug Count—Indicates the number of times this physical drive was removed via a hot-plug event from a
storage system since the drive was stamped. The drive was stamped when it left the factory.
• DRQ Timeouts—Displays the number of times that a physical drive continued to request data but did not get a
command completion. This value increases every time a Data Request (DRQ) timeout occurs for the physical
drive.
A defective drive or cable may cause DRQ timeouts to occur. If you see an increase in these errors, ensure that
the cables connecting the drive are intact.
Logical Drive Information
A list of logical drives associated with the controller displays in the Mass Storage submenu. Each logical drive in the
list displays the condition, logical drive number and the fault tolerance of that logical drive. Select one of the logical
drive entries to display the following information.
• Status—D
isplays the status of the logical drive. The logical drive can be in one of the following states:
• OK—Indicates that the logical drive is in normal operation mode.
• Failed—Indicates that more physical drives have failed than the fault tolerance mode of the logical drive
can handle without data loss.
• Unconfigured—Indicates that the logical drive is not configured.
• Interim recovery—Indicates that the logical drive is using Interim Recovery Mode. In Interim Recovery Mode, at
least one physical drive has failed, but the logical drive's fault tolerance mode lets the drive continue to operate
with no data loss.
• Ready rebuild—Indicates that the logical drive is ready for Automatic Data Recovery. The physical drive that
failed has been replaced, but the logical drive is still operating in Interim Recovery Mode.
• Rebuilding—Indicates that the logical drive is currently doing Automatic Data Recovery. During Automatic Data
Recovery, fault tolerance algorithms restore data to the replacement drive.
• Wrong drive—Indicates that the wrong physical drive was replaced after a physical drive failure.
• Bad connect—Indicates that a physical drive is not responding.
• Overheating—Indicates that the drive array enclosure that contains the logical drive is overheating. The drive
array is still functioning, but should be shutdown.
• 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.
When the status is Rebuilding one of the following values displays to indicate the progress of the rebuild:
• 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.