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Freeing up space on the OS partition (RAIDar 4.2.28, ReadyNAS Ultra 2)
From time to time (very rarely) my OS partition fills up to 100% causing all kinds of issues. Usually, the reason are some log-files that just became too big or too many. Once I had to move the Crash...
Okay, so thanks to mdgm's assistance, it turns out that the files that were clogging up the OS partition were in /mnt/NAS2 where I had mounted another volume and to which Crashplan was writing its backup archives. The problem was that for mysterious reasons that volume disappeared from /etc/fstab and was no longer mounted. And as a result, Crashplan was writing to /mnt/NAS2 as a directory in the OS partition. I would never have thought that it is possible to write to /mnt/NAS2 when the volume is not mounted but apparently it is just an ordinary directory in those conditions.
In order to prevent that in the future, I am now mounting that external volume under the data partition instead of the OS partition,
Aah, I should have guessed that everything that is nt /c/ would be the OS partition. Now I know. Thanks StephenB.
frontview is only 14 MB.
Will keep looking, but maybe that's just how much space the OS needs. Though I do seem to remember that it was much less last time I checked.
mdgm, yes, I have used du quite a bit, but du -h --max-depth=1
just gives me
16K ./lost+found 20K ./home 1.9T ./mnt 524K ./dev 0 ./sys
And then it becomes unresponsive and doesn't complete properly.
The root usage shouldn't really get above 30 to 40%. The 4GB of space is way more than enough.
Keep looking.
Don't look at /dev /proc /sys or /run
The problem won't be in one of those directories. It will be in one of the others.
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