Owner manual

Agent information 64
• Used Reallocs—Displays the number of sectors of the reallocation area that have been used by the physical
drive.
Because of the nature of magnetic disks, certain sectors on a drive might have media defects. The reallocation
area is part of the drive that the drive manufacturer sets aside to compensate for these defects. The controller
writes information addressed from these unusable sectors to available sectors in the reallocation area. If too
many sectors have been reallocated, there might be a problem with the drive. The number of reallocation
sectors reserved for this purpose is drive-specific, and you must contact the drive vendor for these values.
• Spinup Time—Monitors the time it takes for a physical drive to spin up to full speed.
Drives require time to gain momentum and reach operating speed. As cars are tested to go from 0 mph to 60
mph in X number of seconds, drive manufacturers have preset expectations for the time it takes the drive to spin
to full speed. Drives that do not meet these expectations might have problems. If this value increases over time,
the drive might be having problems spinning up. Replace the drive as a precaution.
The spinup value is shown in tenths of a second. If the drive takes 12 seconds to spin up, the value would be
120. The value might be 0 if you are monitoring a physical drive and you use a warm boot to reset the system.
During a warm boot, the drives continue to spin.
• Timeouts—Displays the number of times that the SCSI Hardware Interface Driver issued a SCSI command but
did not receive a reply within a specific amount of time. The count is kept from the time the driver was loaded.
Timeouts might occur when a device fails to process a request because the SCSI bus was busy.
If the count is greater than zero and the drive has failed, complete the following steps to attempt to correct the
problem without replacing the drive:
a. Ensure that all system and storage system cables are intact and seated properly. You might need to replace
the cables.
b. Be sure that the ProLiant Storage System is plugged in and powered on. Be sure the power supply is
functioning.
c. Check the physical proximity of the system to other electrical devices. Because electrical noise might cause
a timeout error, check the AC circuit for other electrical devices.
d. Timeouts can be caused when two or more drives are set to the same SCSI ID. Be sure that the ProLiant and
system SCSI IDs do not conflict.
e. On a ProLiant Storage System, check the SCSI ID cable on the drive tray. If the cable is damaged or
incorrectly installed, SCSI Timeouts can occur. For more information, see the documentation accompanying
the Hot-Plug Drive Tray Service Spare Kit.
f. Be sure that the system temperature is within specified limits. Be sure that fans are operating and are not
blocked.
In some instances, drive failure can cause timeouts. If you continue to receive many of these errors, replace the
drive.
• Problem Indicator—Use this utility to determine when a drive failure has occurred that might be correctable
without replacing the drive. If the drive has failed and the problem indicator is non-zero, place your cursor over
the field and press the F1 key. The context-sensitive Help for the item includes information on correcting the
problem.
• Failure Indicator—Use this utility to determine the cause of failure for a failed drive. If the drive has failed and
this counter is non-zero, replace the drive. If the drive condition is OK and the failure indicator is not zero, the
drive might have an intermittent problem and you might have to replace it. There is no other corrective action
for this error.
• Self-Test Errors—Displays the number of times that a physical drive failed its self-test. The physical drive does a
self-test each time the system is turned on. The number of self-test errors is counted from the time shown in the
Service Hours item on the SCSI Physical Drive window.
If the self-test error count is not zero and the drive has failed, replace the drive. If this count is non-zero, but the
drive has not failed, it could signal an intermittent problem with the drive. If the number of errors increases over
time, replace the drive.
Drive statistics
Select a SCSI physical drive from the SCSI controller submenu to display statistics about a specific SCSI physical
drive. You can use the run-time statistics to monitor the health of a specific drive. The following information displays:
• Sectors Read—Displays the total number of sectors read from the physical disk drive since the time listed in the
Service Hours item in the SCSI Physical Drive section.
• Sectors Written—Displays the total number of sectors written to the physical disk drive since the time listed in the
Service Hours item in the SCSI Physical Drive section.