User manual

Chapter 6. RAID Recovery

QNAP NAS supports exclusive RAID recovery technology to recover a failed RAID

disk volume from unintentional disconnection or removal of the hard drives from the

system. Using the RAID recovery, you can recover an inactive RAID 5 or RAID 6

volume to degraded mode, or an inactive RAID 0 and JBOD configuration to normal.

Disk volume Supports RAID recovery Maximum number of disk

removal allowed

Single No -

JBOD Yes 1 or more

RAID 0 Yes 1 or more

RAID 5 Yes 2 or more

RAID 6 Yes 3 or more

If the volume status is not active, you can install the same hard drives back to the

same slots of the NAS. Then click “RECOVER” on the “Disk Management” >

“Volume Management” page. Wait for about 60 seconds for the process to

complete. When finished, you can access your data again.

Note:

 After recovering the RAID 5 or RAID 6 disk volume from not active to degraded

mode by the RAID recovery, you can read or write the volume normally. The

volume status will be recovered to normal after synchronization.

 If the disconnected drive member is damaged, the RAID recovery function will

not work.