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Models-that-support-Immutable-Snapshots.md

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Synology says Immutable Snapshots and WORM are only available on '20 series and newer models.

https://kb.synology.com/en-global/DSM/tutorial/which_synology_nas_models_support_WriteOnce_and_secure_snapshots

Series Models
HD-series HD6500
FS-series FS6400, FS3600, FS3410, FS3400, FS2500, FS2017, FS1018
SA-series SA6400, SA3610, SA3600, SA3410, SA3400, SA3400D, SA3200D
24-series DS224+
23-series RS2423RP+, RS2423+, DS1823xs+, DS923+, DS723+, DS423+
22-series RS822+, RS822RP+, RS422+, DS3622xs+, DS2422+, DS1522+
21-series RS4021xs+, RS3621xs+, RS3621RPxs, RS2821RP+, RS2421+, RS2421RP+, RS1221+, RS1221RP+
DS1821+, DS1621xs+, DS1621+
20-series RS820+, RS820RP+
DS1520+, DS920+, DS720+, DS620slim, DS420+, DS220+


NOTE: I've had a report of the following causing issues on older models. 007revad/Synology_HDD_db#127

We can enable them on other models that are using DSM 7.2 by running the following command:

sudo synosetkeyvalue /etc.defaults/synoinfo.conf support_worm yes
sudo synosetkeyvalue /etc/synoinfo.conf support_worm yes

Will that work on all models using DSM 7.2... I don't know. I've had reports that this does NOT work on older models.