The Fail State; The Error State - Intel SRCU31A - Server RAID U3-1A Controller User Manual

The Fail State

The array drive changes to the fail state whenever a logical drive fails. Redundancy information is
still present, thus allowing the remaining hard disk drives to continue working. This state should be
eliminated as soon as possible by replacing the defective hard disk drive. This can be done by
using a physical drive that is already connected with the controller, but not yet used for a logical
drive, with the replace drive (logical_replace) function, or by using the Hot Plug: Replace Drive
(hotplug_replace_drive) function. If a hot fix drive has previously been assigned to an array drive,
the Intel RAID Controller SRCU31 will automatically replace the defective drive and start the
reconstruction of the data and the redundant information. Therefore, under these circumstances the
fail state is only temporary and will be eliminated by the controller itself.
Use the last status (physical_drive_laststat) from the physical drive information to analyze the
cause of the drive failure. Additionally, check for retries (terms_retry) and/or reassigns
(terms_grown_defect).
A drive failure may also be the result of bad cabling (terms_cabling), wrong termination
(terms_termination), or overheating.

The Error State

Should a second hard disk drive fail while the array drive is in the fail or rebuild state, it is not
possible to continue the working session without restrictions. The disk array is still available for
I/Os, but data loss and error messages on the host level are possible.
Usually you must remove the array drive and build a new one. In some situations (see below) it
might be possible to reset the array.
Use the last status (physical_drive_laststat) from the physical drive information to analyze the
cause of the drive failure. Additionally, check for retries (terms_retry) and/or reassigns
(terms_grown_defect).
A drive failure may also be the result of bad or cabling (terms_cabling), wrong termination
(terms_termination), or overheating.
Storage Console Plus
Figure 98. The Fail State
Figure 99. The Error State
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