Frequently Asked Question
QNAP reports RAID Group Not Active. Should I replace a disk or initialise the NAS?
QUICK ANSWER
Do not initialise it. Not Active means the RAID group cannot be assembled; replacing a disk as though this were an ordinary degraded array can make recovery harder. Preserve the original drives and obtain an assessment.
Applies to: QNAP NAS reporting Not Active or an inaccessible storage pool; not a normal Degraded (Rebuilding) state.
Work through these checks
- Stop applications writing to the affected storage. Record the exact pool, RAID-group and disk statuses, the last event before failure and which bays contain the original drives. Avoid repeated restarts.
- Check whether an expansion enclosure lost power or its external connection. A disconnected enclosure and multiple failed members can produce different recovery paths. Do not move disks between bays while diagnosing.
- Preserve all original members, including a drive reported faulty. Do not run a new pool wizard, filesystem-creation command or forced RAID assembly copied from a forum.
- Collect a diagnostic log through Helpdesk where accessible and open a private support case. If data has no usable independent backup, explain that before any repair or replacement is approved.
Confirm the result
A valid recovery result requires the original files to be accessible and checked, followed by a separate verified backup. A changed dashboard status alone is insufficient.
Before going further: Clicking Initialise, Remove Pool or creating a new RAID can overwrite recovery information. A warranty replacement does not recover the data on the old device.
If you need help
Include these details in your ticket: Model, firmware, RAID layout, bay statuses, event sequence, backup availability and diagnostic log.
Updated 261107