Recovering Unintentionally Removed Healthy Drives
The NAS supports exclusive RAID recovery technology to recover failed RAID disk volumes from
unintentional disconnection or removal of drives. Users can recover an inactive RAID 1, RAID 5, RAID 6,
RAID 10, RAID 50, or RAID 60 volume from degraded mode.
Disk Volume
RAID
Recovery
Support
Number of Disks
Maximum Number of Removed Drives
Single
No
1
N/A
JBOD
Yes
≥ 2
N/A
RAID 0
Yes
≥ 2
N/A
RAID 1
Yes
2
1
RAID 5
Yes
≥ 3
1
RAID 6
Yes
≥ 4
2
RAID 10
No
≥ 4 (Must be an even
number)
One or two member drives in two different
pairs fail.
RAID 50
Yes
≥ 6
One disk per subgroup fails.
RAID 60
Yes
≥ 8
Two disks per subgroup fail.
Support and Other Resources
QNAP provides the following resources:
Resource
URL
Documentation
Compatibility List
https://www.qnap.com/compatibility
NAS Migration Compatibility
https://www.qnap.com/en/nas-migration
Expansion Unit Compatibility
http://www.qnap.com/go/compatibility-expansion
Service Portal
Product Support Status
https://www.qnap.com/product/eol.php
Downloads
Community Forum
QNAP Accessories Store
TS-x73A User Guide
Troubleshooting
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