[SOLVED] BTRFS 100% full but files take only 75% | Arch Linux Community | Page 1

clear comet Jun 21, 2023, 9:25 AM

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I have a btrfs volume that is 460 GB big. 331 GB of that are used, as evidenced by NCDU and DU.
However, I can't create any files anymore and both df and btrfs subvolume df / display 100% usage wiht only 64 KB free.
How do I fix this?

FIXED: I deleted a log file that actually took up that space, but it ended up not changing the actual usage, but it did hide from du and ncdu. I then killed the creator of the log file (eww) which apparently turned into a zombie in the mean time. That instantly freed up the space the log file used to take.

unborn fiber Jun 21, 2023, 9:26 AM

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clear comet I have a btrfs volume that is 460 GB big. 331 GB of that are used, as evidenced ...

uh...
make sure you're only scanning the btrfs partition and not a bunch of other things

clear comet Jun 21, 2023, 9:27 AM

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that should be only the btrfs partition... also, df only scans the parittion anyway, so if du happened to scan other things that would be bigger no?

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also i'm certain that it's actually full because I can't create files anymore and other things broke as well

unborn fiber Jun 21, 2023, 9:27 AM

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du would scan other things

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bu oh yeah, it's smaller

clear comet Jun 21, 2023, 9:27 AM

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yes but df can't
and du clearly shows 331 GB, even if it scanned other things, thats still significantly less

unborn fiber Jun 21, 2023, 9:29 AM

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oh yeah, do you have snapshots?

clear comet Jun 21, 2023, 9:29 AM

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nope

unborn fiber Jun 21, 2023, 9:30 AM

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try seeing size with sudo btrfs df /

clear comet Jun 21, 2023, 9:30 AM

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i also dont really have a lot of subvolumes

unborn fiber Jun 21, 2023, 9:30 AM

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or sudo btrfs filesystem usage /

clear comet Jun 21, 2023, 9:30 AM

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oh i should add that i had a 130 GB logfile before, i then deleted that using ncdu, and confirmed its gone with du, so maybe that is somewhat related?

unborn fiber Jun 21, 2023, 9:32 AM

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what is ncdu?

clear comet Jun 21, 2023, 9:32 AM

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not curses disk usage

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pretty much a DU TUI

clear comet Jun 21, 2023, 9:34 AM

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clear comet oh i should add that i had a 130 GB logfile before, i then deleted that using nc...

wait... isn't "Zl" a zombie? that log file was by eww, i first closed the bar with eww close bar and then killed the daemon with pkill eww

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ok nvm its gone now?

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OH PKILLING IT A FEW TIMES GAVE ME 125 GB OF SPACE

unborn fiber Jun 21, 2023, 9:37 AM

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try to see what

sudo du -shx $(findmnt /dev/nvme0n1p5 -o TARGET | sed '1d')

outputs

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of course adjust /dev to your appropriate block device

rough pendant Jun 21, 2023, 11:44 AM

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clear comet not curses disk usage

new*

clear comet Jun 21, 2023, 12:16 PM

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oh oops

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[SOLVED] BTRFS 100% full but files take only 75%

unborn fiber Jun 21, 2023, 12:20 PM

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what is solved??

clear comet Jun 21, 2023, 12:20 PM

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the original problem

unborn fiber Jun 21, 2023, 12:20 PM

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it maches now?

clear comet Jun 21, 2023, 12:20 PM

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clear comet ok nvm its gone now?

^

clear comet Jun 21, 2023, 12:21 PM

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unborn fiber it maches now?

yep, apparently the log file was locked which caused it to not actually disappear

#[SOLVED] BTRFS 100% full but files take only 75%