HP 273914-B21 Smart Array 6400 Series Controllers User Guide - Page 44

Open Systems Insight Manager and inspect the Error Counter window

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44 HP Smart Array 6400 Series Controllers User Guide • If you set the SCSI ID jumpers manually: − Check the ID value of the removed drive to be sure that it corresponds to the ID of the drive marked as failed. − Set the same ID value on the replacement drive to prevent SCSI ID conflicts. Before replacing a degraded drive: • Open Systems Insight Manager and inspect the Error Counter window for each physical drive in the same array to confirm that no other drives have any errors. (For details, refer to the Systems Insight Manager documentation on the Management CD.) • Be sure that the array has a current, valid backup. • Use replacement drives that have a capacity at least as great as that of the smallest drive in the array. The controller immediately fails drives that have insufficient capacity. To minimize the likelihood of fatal system errors, take these precautions when removing failed drives: • Do not remove a degraded drive if any other drive in the array is offline (the Online LED is off). In this situation, no other drive in the array can be removed without data loss. Exceptions: − When RAID 1+0 is used, drives are mirrored in pairs. Several drives can be in a failed condition simultaneously (and they can all be replaced simultaneously) without data loss, as long as no two failed drives belong to the same mirrored pair. − When RAID ADG is used, two drives can fail simultaneously (and be replaced simultaneously) without data loss. − If the offline drive is a spare, the degraded drive can be replaced. • Do not remove a second drive from an array until the first failed or missing drive has been replaced and the rebuild process is complete. (The rebuild is complete when the Online LED on the front of the drive stops blinking.) These cases are the exceptions:

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44
HP Smart Array 6400 Series Controllers User Guide
•
If you set the SCSI ID jumpers manually:
−
Check the ID value of the removed drive to be sure that it corresponds to
the ID of the drive marked as failed.
−
Set the same ID value on the replacement drive to prevent SCSI ID
conflicts.
Before replacing a degraded drive:
•
Open Systems Insight Manager and inspect the Error Counter window for
each physical drive in the same array to confirm that no other drives have
any errors. (For details, refer to the Systems Insight Manager documentation
on the Management CD.)
•
Be sure that the array has a current, valid backup.
•
Use replacement drives that have a capacity at least as great as that of the
smallest drive in the array. The controller immediately fails drives that have
insufficient capacity.
To minimize the likelihood of fatal system errors, take these precautions when
removing failed drives:
•
Do not remove a degraded drive if any other drive in the array is offline (the
Online LED is off). In this situation, no other drive in the array can be
removed without data loss.
Exceptions:
−
When RAID 1+0 is used, drives are mirrored in pairs. Several drives can
be in a failed condition simultaneously (and they can all be replaced
simultaneously) without data loss, as long as no two failed drives belong
to the same mirrored pair.
−
When RAID ADG is used, two drives can fail simultaneously (and be
replaced simultaneously) without data loss.
−
If the offline drive is a spare, the degraded drive can be replaced.
•
Do not remove a second drive from an array until the first failed or missing
drive has been replaced
and
the rebuild process is complete. (The rebuild is
complete when the Online LED on the front of the drive stops blinking.)
These cases are the exceptions: