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Synology NAS data recovery

DiskStation, RackStation, FlashStation and BeeStation. Volume crashed, storage pool degraded, or a DSM update that never finished. We know Synology storage in detail.

  • Free evaluation
  • No recovery, no charge
  • Free shipping to the lab

Synology NAS data recovery experts

Synology is the most popular NAS brand among small and medium-sized businesses and home users who want their data stored locally, with shared access for several people. We know these systems well and can answer the questions you have when one fails.

Synology systems we recover

DiskStation (DS)
Desktop units from one bay to twelve, including the Plus, Value and J series and DX expansion units.
RackStation (RS) and SA, HD and UC series
Rack-mount units for business and enterprise.
FlashStation (FS)
All-flash arrays.
BeeStation
Synology's simplified personal cloud units.
Surveillance units
NVR and DVA recorders. See DVR and CCTV recovery.

We recover arrays built with Synology's own HAT and HAS drives and with drives from any other maker.

How Synology stores data

Synology Hybrid RAID (SHR and SHR-2)
Synology's flexible RAID, built from Linux software RAID and LVM. It lets drives of different sizes be combined, and it creates several RAID sets that must all be reassembled.
Btrfs and ext4
Plus and higher models default to Btrfs with snapshots and checksums. Others use ext4.
Encryption
Encrypted shared folders, and full-volume encryption since DSM 7.2. You will need the key file or password.
SSD cache
A read-write cache holds data not yet written to the main volume.

What goes wrong

  • "Volume crashed" or "Storage pool crashed" in Storage Manager
  • Degraded pool followed by a second drive failure during repair
  • Single or multiple hard drive failure
  • Read-write SSD cache failure
  • NAS will not boot, or the status light blinks without starting
  • DSM update or migration failure
  • Deleted shared folder, volume or storage pool
  • Drives showing as "Not initialized" after moving to a new unit
  • Btrfs metadata corruption after power loss
  • Overheating, power surge and natural disasters
  • Ransomware encryption of shared folders

If Synology Assistant or the web setup page offers to install DSM or erase the drives, stop. Power the unit off and call us.

Synology models we recover, 2013 to 2026

Examples of the model numbers we see most often, grouped by the years each range was sold. The model name is printed on the front panel and on the sticker underneath or at the rear of the unit, beside the serial number.

YearsRangeModel numbers
2013–2015DiskStation, 2013 and 2014 modelsDS213j, DS1513+, DS1813+, DS214, DS214play, DS414
2013–2025RackStation, 2014 to 2021 modelsRS814+, RS815+, RS1219+, RS1221+, RS2421+, RS3621xs+
2014–2016DiskStation, 2015 modelsIntel Atom C2000 CPU fault affects DS415+, DS1515+ and DS1815+DS215j, DS415+, DS1515+, DS1815+, DS2415+
2015–2017DiskStation, 2016 modelsDS216, DS216+II, DS716+, DS416play, DS916+
2017–2020DiskStation, 2018 modelsPlus models support Btrfs; DS218 and DS418 use ext4DS218, DS218+, DS418, DS718+, DS918+, DS1618+
2018–2026FlashStation and BeeStationFS1018, FS2500, FS3410, BST150-4T
2019–2021DiskStation, 2019 modelsDS1019+, DS1819+, DS2419+
2020–2023DiskStation Plus, 2020 modelsPlus models support Btrfs as well as ext4DS220+, DS420+, DS720+, DS920+, DS1520+
2020–2025DiskStation Plus, 2021 and 2022 modelsDS1621+, DS1821+, DS1522+, DS2422+
2022–2025DiskStation, 2023 and 2024 modelsDS223, DS224+, DS423+, DS723+, DS923+, DS1823xs+
2025–2026DiskStation Plus, 2025 modelsDS225+, DS425+, DS725+, DS925+, DS1525+, DS1825+
2026RackStation xs+, 2026 modelsReleased April and May 2026RS1626xs+, RS3626xs+, RS4826xs+, RS6426xs+

Not listed? These are examples, not limits. If your model is missing we almost certainly still recover it. Give us the number when you start a case.

Contact the experts

RMLD offers Synology recovery for all DSM versions and configurations. We image every drive, rebuild the SHR or RAID layout and the file system from the images, and extract your shared folders, snapshots, virtual machines and Hyper Backup data.

A Synology NAS can be dropped off at our Temecula lab or sent by mail or courier. Label each drive with its bay number. Call (951) 595-8065 or start a case online.

How a case works

Six steps from the first call to your files. You approve the quote and check the results before paying.

  1. Tell us what happenedCall or start a case online. A technician reviews it and tells you how to send or bring the device.
  2. Ship it or drop it offShipping to the lab is free. You can also hand it in at Temecula or London.
  3. Free evaluationWe diagnose the fault and send a firm quote. Nothing is charged for this.
  4. Recovery in our labOnce you approve, the work is done in-house. Your device never leaves our company.
  5. You check the filesYou receive a list of what was recovered and confirm it before paying.
  6. Data returnedOn a new drive, your own drive, or by encrypted download. No recovery means no charge.

More recovery services

Talk to a technician before you try anything else

The evaluation is free, and the first advice you get can decide whether the data comes back.

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