Help! Disk Full. Login Not Possible

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Help! Disk Full. Login Not Possible

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DS4l8play, DS202j, DS3623xs+, DSM 8.025847-𝘣𝘦𝘵𝘢
A fine fix I've gotten myself into.

I believe I have messed up the OS partition with excess files.

I cannot login via DSM or SSH.

Any way out apart from Reset Mode 2?
 
In a 2 disk setup I would have tried to bring the disk(s) one by one to a linux system and delete some rubbish from the system partition. With 4 disks, that scenario seems not possible to me.
 
I thought about pulling all drives, and inserting a single "new" drive to create a simple SHR, then adding 3 of the drives back, thinking an OS repair/rebuild might work. Still puzzling it all out.
 
Have you tried a good old fashioned switch off and on again? (Rather than the reset button?)
Yes, thank you. But, no success... so I went for the full reset. O my, was that a learning curve.

It seems as though I cobble together various features over the months and years, my "ho to" documentation is lacking, so I've had to refigure quite a bit out. Fortunately...
1. I have current HB backups of all possible apps. So that went well until I tried to restore the DSM configuration, to discover how to relink old backups, and then to use the original "admin" account to complete the configuration restore.
2. Plex reinstall went well, requiring me to set Plex user rights to my media.
3. Docker (not officially supported) was the real surprise, as all my container seemed to automagically appear... and work!

But I was flummoxed with CardDAV for a while, until I discovered that a reverse proxy I used was the key to my previous working URL... I also discovered that that reverse proxy was responsible for blocking Photo Station launching... I never really understood why PS was so finicky, until I noticed that it was working fine after the reset... When I added back the reverse proxy for the DSM... it killed PS launch, but notably "fixed" my CardDAV set up.

So now... 6 hours later... I believe most everything is back up.

Next to SSH in and see what mess is lurking... that brought this system to its feet early this morning.
 

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