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Cannot update past DSM 6.2.1-23824 Update 2 (DS3615xs)


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Installed on ESXI6.5 the DSM 6.2.1-23824 Update 2  (DS3615xs)


Whenever i try to update manually from a pat file (synology_bromolow_3615xs.pat), I get returned that "The update you are applying is not compatible with this version of DSM.  Please get the compatible file and try again"


Also note using Jun's Bootloader 1.03b


Anyone have any ideas how to update?

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On 4/2/2021 at 7:46 PM, opticle said:


the file name only shows its a update to a minor version, if you choose a wrong one (like from 6.2.2 or 6.2.3) it will not match

you can check with 7zip, open the *.pat fiel with it and check the "DSM-Security.json" file, there will be the dsm version the update file is made for

looks like this: (24922 is 6.2.2, 25426 is 6.2.3)

    "builddate": "2020/03/12",
    "dsmversion": 24922,
    "smallupdate": [


for updating you would install 6.2.3 (full *.pat file with 200-300MB)


and then update3 for that version


(6.2.4 is not working with the loader anymore so dont use it)

Edited by IG-88
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6 hours ago, opticle said:

So once I grabbed DSM_DS3615xs_25426.pat everything updated as expected

you might also install the synoboot fix from above as the loader does not match 100% anymore with 6.2.3 (patching on boot) and misses a portion and the fix from flyride does take care of this

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