I don't see anything particular.... /var content looks ok,
Your root looks good too (unexpected folder /1, but it's empty).
Can you post result of "du -xhs /dev" and ls -la /?
I would think about two things: a) File system corruption, b) a couple of huge files in a mount point [core dump under /volume1 for instance).
To clear a) you can run a file system check.
The above command will not fix file system error, just report issues.
If issues..... Need to find out out to fix.... I know on traditional linux box how to force a fsck on a mounted root file system.... Don't know how to do this on DSM.... May be some reader can.
We must remount root as readonly then run fsck.......
As for b).
You must umount /volume1, /volumeSATA1 and /volumeUSB1 to check whether you have unexpected files in these directories.
Umounting SATA1 and USB1 is not an issue, eject it with DSM then "cd /volumeSATA1; ls -la" to identify unexpected files, same for for /volumeUSB1.
For /volume1 it's slightly different. umount will probably tell it can't because filesystem is busy....
Code: Select all
# So assuming you are logged as admin
# change working directory to make sure umounting won't raise busy file system exception
# now replace current admin shell process with sudo...
exec sudo -
# it gracefully terminates all application/process and unmount volumes.
# if will take some time (eventually your ssh session will be closed if for some reasons you missed one of the above steps (cd /; exec).
# to check /volume1 has been unmount.
# if not umount it.
cd /; cd /volume1
# should be empty.... If not this is eating space on you root file system....
# once every thing checked reboot
PS: edited post to add stuff about current working directory