https://github.com/007revad/synology_dsm_reinstall
Easily re-install the same DSM version without losing any data or settings
https://github.com/007revad/synology_dsm_reinstall
diskstation dsm rackstation synology synology-disk-station synology-dsm synology-nas
Last synced: 5 months ago
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Easily re-install the same DSM version without losing any data or settings
- Host: GitHub
- URL: https://github.com/007revad/synology_dsm_reinstall
- Owner: 007revad
- License: mit
- Created: 2023-06-24T01:18:14.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2025-03-22T20:06:09.000Z (7 months ago)
- Last Synced: 2025-05-04T17:47:24.996Z (5 months ago)
- Topics: diskstation, dsm, rackstation, synology, synology-disk-station, synology-dsm, synology-nas
- Language: Shell
- Homepage:
- Size: 476 KB
- Stars: 37
- Watchers: 5
- Forks: 3
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGES.txt
- Funding: .github/FUNDING.yml
- License: LICENSE
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README
# Synology DSM re-install
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### Description
Easily re-install the same DSM version without losing any data or settings
- If you need to re-install the same full release DSM version this is much easier than resetting the Synology.
- It can also be used to roll back from an update version to the same full release version.
### Important
You must download a full version pat file. If you download a small update pat file you will get an error saying:
*The update that you are applying is not compatible with this version of DSM*
### How to tell if a .pat file is a full release or a small update
- 
Full release DSM pat files are:
- Normally named *DSM_model_build.pat* like **DSM_DS224+_64570.pat**
- Are 270MB or larger and always much larger than small updates.
- 
Small update pat files are:
- Always named *synology_arch_model.pat* like **synology_geminilake_224+.pat**
- Are 1MB to 130MB and always much smaller than full updates.
- **Note:** Sometimes a full release is named like a small update .pat file when Synology messes up the file naming.
- See https://archive.synology.com/download/Os/DSM/7.1.1-42962-1-NanoPacked
### Steps to reinstall DSM
1. Disable DSM Auto Update via "Control Panel > Update & Restore > Update Settings > Notify me... > OK".
2. Download the same DSM full release build version from Synology's download site.
- https://archive.synology.com/download/Os/DSM/
4. Run this script via SSH or from Task Scheduler.
5. Go to "Control Panel > Update & Restore > Manual DSM Update".
6. Browse to the DSM .pat file you downloaded in step 2 and click Open then OK.
7. *Optionally unplug your router from the Internet **after DSM has started installing** to prevent DSM updating to the latest update version.*
8. Click Update.
9. Wait for the Synology NAS to finished updating and rebooting.
10. *If you unpluged your router from the Internet in step 6, reconnect it now.*
## Download the script
1. Download the latest version _Source code (zip)_ from https://github.com/007revad/Synology_DSM_reinstall/releases
2. Save the download zip file to a folder on the Synology.
3. Unzip the zip file.
## How to run the script
You can run the script either via SSH or in Task Scheduler.
#### Scheduling the script in Synology's Task Scheduler
- How to run a script in Synology Task Scheduler
- How to see the output of a script run in Synology Task Scheduler
#### Running the script via SSH
[How to enable SSH and login to DSM via SSH](https://kb.synology.com/en-global/DSM/tutorial/How_to_login_to_DSM_with_root_permission_via_SSH_Telnet)
**Note:** Replace /volume1/scripts/ with the path to where the script is located.
```YAML
sudo -s /volume1/scripts/syno_dsm_reinstall.sh
```
## Screenshots
Here's the result after running the script.
The script has edited DSM's VERSION file to a lower build number
Select your downloaded DSM .pat file
No complaints from DSM
