Recovering unintentionally removed hard drives
The NAS supports exclusive RAID recovery technology to recover failed RAID groups from unintentional
disconnection or removal of drives. Users can recover an inactive RAID 1, RAID 5, RAID 6, RAID 10, or RAID 50
group from degraded mode.
RAID Type
RAID Recovery
Support
Number of Disks
Disk Failure Tolerance
Single
No
1
N/A
JBOD
No
≥
2
N/A
RAID 0
No
≥
2
N/A
RAID 1
Yes
2
1
RAID 5
Yes
≥
3
1
RAID 6
Yes
≥
4
2
RAID 10
Yes
≥
4 (Must be an even
number)
One disk per subgroup fails.
RAID 50
Yes
≥
6
One disk per subgroup fails.
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/go/nas-migration
Expansion Unit Compatibility
https://www.qnap.com/go/compatibility-expansion
Service Portal
Product Support Status
https://www.qnap.com/go/product/eol.php
Downloads
Community Forum
QNAP Accessories Store
TS-AI642 User Guide
Troubleshooting
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