Critical & Offline Logical Drives; Finding The Failed Drive In Superbuild - Promise Technology Network Device EX4650 User Manual

Critical & Offline Logical Drives
A fault-tolerant logical drive—RAID 1, 1E, 5, 6, 10, 50, or 60—goes critical when
a physical drive is removed or fails. Due to the fault tolerance of the logical drive,
the data is still available and online. However, once the logical drive goes critical,
the logical drive has lost its fault tolerance, and performance may be adversely
affected.
If the fault was caused by a failed drive that was removed, the drive must be
replaced by another drive, either identical or larger, in order for the RAID system
to rebuild and restore optimal configuration.
If your fault-tolerant logical drive—RAID 1, 1E, 5, 6, 10, 50, or 60—goes offline,
contact Technical Support. See page 273.
A non-fault tolerant logical drive—RAID 0—goes offline when a physical drive is
removed or fails. Since the logical drive is not fault tolerant, the data stored in the
logical drive is no longer accessible.
If one physical drive fails, all of the data on the logical drive is lost. You must
replace the failed drive. Then, if the logical drive had more than one physical
drive, delete the logical drive and re-create it. Restore the data from a backup
source.

Finding the Failed Drive in SuperBuild

To identify a failed physical drive:
1. In the Main Menu, highlight Physical Drive Management and press Enter.
The Physical Drive Management screen displays.
2. Compare the list of physical drives on the screen against the actual physical
drives attached to the SuperTrak controller.
Take no further corrective action until you have consulted with
Technical Support. See page 273.
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Chapter 8: Troubleshooting