Recovery assessment for QNAP NAS systems after disk failure, degraded arrays, missing members, failed rebuilds, accidental reconfiguration, file-system damage or inaccessible shares.
Stop before rebuilding or initialising
Do not initialise the NAS, create a new storage pool, force a rebuild, replace multiple drives at once, change the disk order or allow automatic repair when the only copy of important data is at risk. Shut the system down if disks are dropping out, clicking or producing read errors.
QNAP storage configurations
QNAP QTS systems commonly use Linux software RAID with ext4, while QuTS hero systems use ZFS. We assess RAID 0, 1, 5, 6, 10 and selected nested or enterprise layouts, as well as JBOD, single-disk volumes, iSCSI LUNs, snapshots, thin or thick volumes and SSD-cache complications where supported.
Synology Hybrid RAID (SHR) is a Synology technology and is not described as a QNAP RAID mode. Correctly identifying the operating system, pool type, RAID metadata and volume layout is essential.
Common QNAP recovery scenarios
- One or more disks failed or were removed.
- A rebuild failed or completed with corrupted data.
- Drives were inserted in the wrong order.
- The NAS was reset, reinitialised or a storage pool was deleted.
- The array is online but shares or files are missing.
- Ransomware, accidental deletion or file-system corruption affected the volume.
- An iSCSI LUN, virtual disk or encrypted volume is inaccessible.
- SSD cache failure has left inconsistent data.
Information to preserve
Keep every original disk, including failed members and any disk removed earlier. Label the bay position before moving drives. Do not write to the disks individually. Record the QNAP model, firmware or QTS/QuTS hero version if known, number of bays, drive order, RAID level, pool/volume configuration, encryption status and exact sequence of events.
Recovery process
- Review the event history and map every disk to its original bay.
- Test and image unstable members individually to stable storage.
- Analyse RAID metadata, parity, stripe size, disk order, offsets and missing members.
- Reconstruct the array virtually rather than writing changes to the source disks.
- Examine ext4, ZFS, LVM, storage pools, snapshots, LUNs or other layers as applicable.
- Extract and verify the priority shares, virtual machines, databases or files.
Encryption and credentials
Encrypted volumes or folders require the relevant password, key file or viable original configuration. We ask only whether credentials are available at enquiry stage and arrange their secure transfer if needed after acceptance.
Costs and scope
Multi-drive recoveries are quoted after the configuration and condition of every member are understood. Donor parts, additional imaging storage, return media and urgent work can add cost. See pricing and fees for the general policy.
Frequently asked questions
Should I replace the failed disk and rebuild?
Only when you have a verified independent backup and understand the state of every remaining member. A rebuild stresses all disks and can make an already unstable array worse.
Do you need the QNAP enclosure?
Often the disks and configuration history are most important, but the enclosure, power supply and DOM may help in some cases. Ask before shipping.
Can you recover a deleted storage pool?
Potentially, depending on what was recreated or overwritten afterward. Stop using the system immediately.
Start a QNAP or RAID recovery case
Tell us what happened, what device you have and which files matter most. We will provide packing instructions for a tracked mail-in case or arrange a Timaru drop-off.
Submitting an enquiry does not authorise paid recovery work. Any applicable assessment, parts, media, courier or recovery charges are explained before you approve them.