Infortrend RAID Controller Manual

NOTE:
• With the precaution of untimely drive failure of yet another drive, when configured
as “perpetual clone,” the spare drive will stay only mirrored to the source drive (the
drive with predictable drive failure) but not replacing it until the source drive fails.
4d. When the spare drive is mirroring the source drive, any
occurrence of drive failure (when there is no other spare drives) will
force the spare drive to give up the mirrored data and resumed its
original role – it will become a spare drive and start rebuilding the
failed drive.
5. The “Detect, Clone+Replace” Function:
5a. In \View and Edit Configuration Parameters\Drive-side SCSI
Parameters\Drive Predictable Failure Mode , choose
“Detect, Clone+Replace.”
5b. Assign at least one spare drive to the logical drive. (Either Local
Spare Drive or Global Spare Drive)
5c. When a drive (a logical drive member) detects the predictable
drive failure, the controller will “clone” the drive with a spare drive.
After the “clone” process is finished, it will replace the source drive
(the drive which detects the predictable drive failure) immediately.
The source drive will become a used drive and you may replace this
drive with a new one.
If you want to see the progress of cloning, press [ESC] to clear the
notification message and see the status bar.
The source drive’s status will be re-defined as an “Used drive” and
will be immediately replaced and pulled off-line. This drive should
be replaced with a new drive as soon as possible.
Advanced Configurations 10-25