DSM 7.2 root file system full

[ianp]

I have followed this forum for some time, but untill now I have not had a problem worth mentioning, however...

The saga started when I decided to migrate the drives from my 918+ to a 423+. All went well untill it tried to download dsm. It said that there was no space on the root file system. I put the discs back into the 918+ and it booted up and so I was able to get ssh access.

Checking usage gave the following:-

ianp@syno918:/dev$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md0 2.3G 2.3G 0 100% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 244K 7.8G 1% /dev/shm
tmpfs 7.8G 19M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
tmpfs 7.8G 1.4M 7.8G 1% /tmp
/dev/mapper/cachedev_0 42T 28T 14T 67% /volume1

As you can see the /dev/md0 partition is indeed full.

This is the limit of my knowledge so can anyone please give me any advice on how to clear some space without messing up the system. Many thanks.

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[Telos]

This is often due to a bad user script/hack, errant docker set up, or temp files that were orphaned.

Drill down through your root partition and see if there are recognizable artifacts that should not be there.

This thread goes through a similar issue. Post your screenshots as necessary.

 

[ianp]

Found this thread that shows how to mount the dev/md0 partition to a folder. Did this and went through all the folders but nothing stood out. How to escape from “Failed to install DSM Available system space is insufficient." or similar messages

 

[ianp]

Now heard from syno support and setup remote access as requested so will see what they can find.

 

[ianp]

Well support have fixed the problem with this explanation:-

After investigation, we found that the issue was caused by a previous DSM update that failed and left residual files on the system partition. We have manually cleaned up these leftover files.
Could you please check and confirm if the issue has been resolved on your side?