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QuTS hero 5.0.x

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RAID Disk Failure Protection

All RAID types except for RAID 0 can tolerate a specific number of disk failures without losing data. When a disk in a RAID group fails, the RAID group status changes to degraded and then QuTS hero performs one of the following actions.

Spare Disk Available



  • QuTS hero automatically replaces the failed disk with a spare disk and then starts rebuilding the RAID group.

  • The status of the RAID group changes to rebuilding, and then changes back to Ready after rebuilding has finished.


You must replace the failed disk manually. QuTS hero starts rebuilding the RAID group after you have installed a working disk.