Dynamic sector repair

Disk drive media can develop defects caused by variances in the drive mechanisms under normal operating conditions. To protect data from media defects, HPE built a dynamic sector repair feature into HPE Smart Array controllers.

HPE Smart Array controllers:

• Perform a background surface analysis during inactive periods, continually scanning all drives for media defects

• Detect media defects when accessing a bad sector during busy periods

• Automatically remap the bad sector to a reserve area on the disk drive

• (in a fault-tolerant configuration) Automatically regenerate the data and write it to the remapped reserved area on the disk drive