NAS Recovery
NAS devices combine RAID, Linux volume managers and vendor file systems. AS recovers at each layer — disks, array, volume and file system — working from images of the drives.
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AS RAID Recovery — Rebuild RAID 0, 1, 5, 6, 10 and NAS arrays from their member disks or images — automatically — and recover the files on them.
When you need this
- NAS shows volume crashed or degraded
- Firmware update or reset wiped the configuration
- Disks moved to a new unit and the array wasn't recognised
- Btrfs or ext4 volume corruption
- NAS encrypted by ransomware through SMB shares
- Accidental deletion of shared folders
What we do
Disk imaging
Drives are removed and imaged individually; the NAS itself is not used for recovery.
Array and volume reconstruction
mdadm, LVM, SHR and vendor-specific layouts are reconstructed to expose the underlying volume.
File system recovery
ext4 and Btrfs structures are recovered, including snapshots where they survive, which can be valuable after ransomware.
Share-level restoration
Recovered data is organised by share so it can be validated and returned to the rebuilt NAS.
A NAS volume is built on ordinary member disks underneath — if one has dropped out due to its own firmware fault, the same service-area/PCB-ROM repair applies before the array can be reconstructed.
How it works
- Step 1
Consultation and scope
We establish what failed, what has been tried, and which data matters most. This shapes a targeted plan rather than a generic one.
- Step 2
Secure imaging and diagnosis
Where possible the source media is imaged before any work, so the original is never altered. Diagnosis then determines the safest recovery method.
- Step 3
Recovery
Data is extracted from the image or source using methods matched to the failure — logical, structural or hardware-level as required.
- Step 4
Verification
Recovered data is checked for integrity and completeness, and a file list is shared so you can confirm what matters is there.
- Step 5
Secure delivery
Verified data is returned through an agreed secure method, with guidance on validation before it goes back into production.
What affects the outcome
We have solved 656+ cases like these. Every case is assessed on its own condition, and we tell you exactly what is recoverable after a free assessment, before you pay anything.
- Physical condition of the media and the extent of any damage
- Whether the media has been written to, reformatted or re-initialised since the failure
- Encryption, corruption or partial overwriting of the data
- Availability of source data such as images, backups, logs or transaction records
- Attempts made before assessment (rebuilds, repair tools, repeated reboots)
AS RAID Recovery
For NAS arrays whose member disks still read normally: rebuild the array from the disks or their images on a Windows PC. The free edition detects and rebuilds the array and previews every file.
Frequently asked questions
My NAS says the volume crashed. Is the data gone?
Not necessarily. 'Crashed' usually refers to the array state; data is frequently recoverable from the disks after assessment.
Can Btrfs snapshots help after ransomware?
Sometimes. If snapshots existed and were not deleted by the attacker, they can provide clean pre-encryption data.
Only some folders on our NAS got encrypted before we caught it — why not everything?
Encrypting over a network share is slower than encrypting local disks directly — every file has to be read and written back across SMB/NFS rather than at local disk speed. On a share with a lot of data, that gives you a real window: if the attack is noticed and the share disconnected or the NAS powered down quickly, a meaningful portion of files can end up completely untouched rather than partially damaged. It's worth checking which folders were actually reached before assuming the whole share is affected.
Should I try inserting the disks into another NAS?
Avoid it. Some units initialise unrecognised disks. Leave the disks as they are until assessed.
Do you offer Synology NAS recovery?
Yes. Synology NAS recovery, and recovery from QNAP and similar devices, works on the member disks: we reassemble the RAID and the volume and read the shares, also after a failed rebuild, a crashed volume or a ransomware attack on the NAS.
Related reading
Related services
Facing this problem? Contact us now.
We have already solved 656+ ransomware and data recovery cases: encrypted and corrupted SQL Server, Oracle and MySQL databases, Tally, Busy and Marg ERP data, Veeam backups, VMware and Hyper-V virtual machines, RAID and NAS. Send us the details and we tell you what we can recover.
- ✓ Free assessment before you pay anything
- ✓ No data, no charge
- ✓ NDA on request
Email: info [at] asittech.com · Mon–Fri, 9:00–18:00 IST