- Networks
- NAS storage
Volume has crashed
Synology Volume has crashed: NAS storage volume unrepairable
Risk level
High
Professional inspection is recommended.
Urgency
Immediate
Quick answer
If a volume on your Synology NAS has crashed and files can still be read in File Station, do not power off the system: back up your data immediately to a local network computer. If a drive was removed accidentally, reinsert it right away and use online assemble in DSM 7.
Safety first
Stop and check this first
- When data on a crashed volume can still be read via File Station, do not power off your Synology storage system before backing up your files to a client computer on the local network.
Safe checks you can perform
- Check whether the crash followed accidental drive removal
- Verify in File Station whether data can still be read
- Remove the crashed pool and run a Synology memory test
Leave these tasks to a qualified professional
- Do not attempt this professional task: Identify the crash scenario and safeguard readable data first
- Do not attempt this professional task: Run the memory test, replace faulty RAM if needed, and rebuild storage
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Identify the crash scenario and safeguard readable data first
What they doThe technician determines which of Synology's four crash scenarios applies, performs online assembly and data scrubbing if a drive was accidentally removed, or backs up readable files over the local network without powering off the NAS.
They must show youFile Station readability or the online assemble option in Storage Manager > Storage.
In writingmatched crash scenario (1 to 4), backup status, or referral to a data rescue company if files cannot be read.
Run the memory test, replace faulty RAM if needed, and rebuild storage
What they doAfter data is backed up and the crashed storage pool is removed in Storage Manager, the professional runs the memory test, replaces any failing or non-Synology memory module with a Synology module, and creates a new storage pool and volume.
They must show youthe memory test outcome, any replacement Synology memory module installed, and the newly created volume.
In writingmemory test result, new storage pool and volume configuration, and verification of restored data.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Check whether the crash followed accidental drive removal
- Who:
- you, checking the drive bays and DSM Storage Manager on your Synology NAS.
- How:
- if a drive was accidentally removed, reinsert it into the Synology storage system immediately and in DSM 7 go to Storage Manager > Storage to online assemble the storage pool (or restart the system on DSM 6.2).
- Result that matters:
- convert the storage pool back to available status without restarting on DSM 7 and run data scrubbing afterward.
- If the issue is solved after online assembly or restart:
- perform data scrubbing and back up your data.
- If no drive was accidentally removed or the pool stays crashed:
- check whether files can still be read in File Station.
- Evidence to keep:
- storage pool status after reinserting the drive and running online assemble or restarting.
Evidence: What can I do if one of my volumes crashed?
Verify in File Station whether data can still be read
- Who:
- you, signed in to DSM while keeping the Synology NAS powered on.
- How:
- open File Station to see if files are still readable; if they are, do not power off the NAS and back up the data immediately to a client computer on the local network (Windows or Mac), skipping any corrupted file that triggers a copy error.
- Result that matters:
- secure all readable files before removing the storage pool of the crashed volume.
- If readable data has been backed up to a local client computer:
- proceed with pool removal and the memory test.
- If data cannot be read via File Station because of drive errors:
- contact a local data rescue company for assistance.
- Evidence to keep:
- backup completion record and list of any corrupted files skipped during copying.
Evidence: What can I do if one of my volumes crashed?
Remove the crashed pool and run a Synology memory test
- Who:
- you or the technician, once readable data is backed up from the crashed volume.
- How:
- go to Storage Manager to remove the storage pool of the crashed volume and run a memory test on your Synology system; if the result is not Normal or a non-Synology module is installed, have a technician replace the memory module.
- Result that matters:
- confirm a Normal memory test outcome before creating a new storage pool and volume and restoring data.
- If the memory test result is Normal:
- create a new storage pool and volume and restore the backed-up data.
- If the memory test is not Normal:
- arrange professional replacement with a Synology memory module before recreating storage.
- Evidence to keep:
- memory test result and the health status of the newly created storage pool and volume.
Evidence: What can I do if one of my volumes crashed?
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Networks
- Brand
- Synology
- Product type
- NAS storage
Known code variants
- Crashed volume detected
- El volumen se ha averiado
- Grupo de almacenamiento averiado
- Storage pool crashed
- Storage pool with a Crashed status
- Volume crashed
- Volumen averiado
What it means
According to Synology's official documentation, a volume or storage pool that has crashed due to drive errors or file system errors cannot be repaired directly. Synology defines four scenarios: system cannot power on, data cannot be read in File Station, data can still be read in File Station, or a drive was accidentally removed. A crashed volume message by itself does not prove every drive or memory module is defective without checking which scenario applies.
Warnings and stop conditions
- Highsource verified
When data on a crashed volume can still be read via File Station, do not power off your Synology storage system before backing up your files to a client computer on the local network.
Evidence: What can I do if one of my volumes crashed?
Symptoms and causes
Probable causes · in order
- Drive errors or file system errors exceeding repairCommon
Synology states that a volume crash caused by drive errors or file system errors cannot be repaired through the normal Storage Manager repair option.
Evidence: What can I do if one of my volumes crashed? · Repair a Storage Pool | DSM
- Accidental removal of an active drivePossible
Accidentally pulling a drive out of the Synology storage system while in use can cause the volume to enter a crashed state.
Evidence: What can I do if one of my volumes crashed?
- Abnormal memory test result or non-Synology RAM moduleLess common
Synology's crash recovery workflow includes running a memory test to check for an abnormal memory module or non-Synology memory module.
Evidence: What can I do if one of my volumes crashed?
Virtual technician
Does Volume has crashed still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
What can I do if one of my volumes crashed?
Synology Inc. · 2026 · official_doc
- 2
¿Qué puedo hacer si uno de mis volúmenes se ha averiado?
Synology Inc. · 2026 · official_doc
- 3
Synology Inc. · 2026 · official_doc
- 4
Reparar un grupo de almacenamiento | DSM
Synology Inc. · 2026 · official_doc
Was this entry useful?