Compaq Infortrend manual

3b. Whenever a drive predicts symptoms of predictable drive failure, controller will issue an error message.

4. The “Detect, Perpetual Clone” Setting:

4a. In \View and Edit Configuration Parameters\Drive-side SCSI Parameters\Drive Predictable Failure Mode <SMART>, choose “Detect, Perpetual Clone.”

4b. You should have at least one spare drive for the logical drive (either Local Spare or Global Spare Drive).

4c. When a drive (logical drive member) detects the predictable drive errors, the controller will “clone” the drive with a spare drive. You may enter the "View and Edit SCSI Drive" menu and click on the spare drive (either a local or a global one). Choose from the menu items if you want to know about the status of the source drive, the cloning progress, or to abort cloning.

NOTE:

•With the precaution of untimely drive failure of yet another drive, when configured as “perpetual clone,” the spare drive will only stay mirrored to the source drive (the drive with signs of failure), but not replacing it until the source drive actually 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 resume its

9-9 Infortrend