Compaq Infortrend manual Disable, Detect Only, Perpetual Clone, Clone + Replace

There are four selections related to the S.M.A.R.T. functions in firmware:

Disable:

Disable S.M.A.R.T.-related functions

Detect Only:

S.M.A.R.T. function enabled, controller will send command to enable all drives' S.M.A.R.T. function, if a drive predicts a problem, controller will report the problem in the form of an event log.

Perpetual Clone:

S.M.A.R.T. function enabled, controller will send command to enable all drives' S.M.A.R.T. function. If a drive predicts a problem, controller will report in the form of an event log. Controller will clone the drive if there is a Dedicated/Global spare available. The drive with predicted errors will not be taken off-line, and the clone drive will still behave as a standby drive.

If the drive with predicted errors fails, the clone drive will take over immediately. Under the circumstance that the problematic drive is still working and another drive in the same logical drive should fail, the clone drive will resume the role of a standby spare and start to rebuild the failed drive immediately. This is to prevent a fatal drive error if yet another drive should fail.

Clone + Replace:

Controller will enable all drives' S.M.A.R.T. function. If a drive predicts a problem, controller will report in the form of event log. Controller will then clone the problematic drive to a standby spare and take the problematic drive off-line as soon as the cloning process is completed.

NOTE:

•If you are using drives of different brands in your RAID system, as long as they are ANSI-SCSI Informational Exception Control (IEC) document X3T10/94-190 compatible, it should not be an issue working with the controller.

Advanced Configurations 9-6