Arch Linux

PranshuTG

Member

Registered: 2022-04-01

Posts: 89

[solved] btrfs no space left on device

I am using btrfs on a single nvme ssd. my output from df shows

df -h .
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme0n1p6  416G  397G   19G  96% /

but my output from btrfs tools shows

btrfs fi show
Label: 'Arch'  uuid: 0cdda07c-4520-4370-ab75-eb69de736229
	Total devices 1 FS bytes used 392.60GiB
	devid    1 size 415.28GiB used 415.28GiB path /dev/nvme0n1p6

i tried btrfs balance and fstrim, but it did nothing and i dont have any other ideas...

Last edited by PranshuTG (2024-05-14 17:28:41)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,104

Re: [solved] btrfs no space left on device

df doesn't have 100% correct representations of a btrfs device, but even if you just consider the btrfs output you are close to full regardless (fwiw btrf does have an actual "btrfs df/usage" which considers the peculiarities properly).

Do you have snapshots setup with timeshift or so? have you deleted older snapshots? FWIW if you've never done it the pacman cache can grow quite big if you aren't clearing it: https://wiki.archlinux.org/title/System … filesystem

Last edited by V1del (2024-01-19 12:39:59)

WorMzy

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Re: [solved] btrfs no space left on device

Mod note: Moving to NC.

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PranshuTG

Member

Registered: 2022-04-01

Posts: 89

Re: [solved] btrfs no space left on device

(fwiw btrf does have an actual "btrfs df/usage")

btrfs fi df /
Data, single: total=408.26GiB, used=389.60GiB
System, DUP: total=8.00MiB, used=64.00KiB
Metadata, DUP: total=3.50GiB, used=3.00GiB
GlobalReserve, single: total=512.00MiB, used=16.00KiB

also i regularlarly delete my pacman cache using paccache -r -k 0

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,104

Re: [solved] btrfs no space left on device

So yeah, whats your question? You still have ~19Gigs effectively usable free space, in that regard both df and btrfs df agree. If you have a bunch of snapshots that contain new data, get rid of old snapshots.

E.g. if you run paccache -r but the entirety of your pacman cache is still present in an older snapshot then you need to get rid of said information in the snapshots.

Last edited by V1del (2024-01-19 12:56:51)

PranshuTG

Member

Registered: 2022-04-01

Posts: 89

Re: [solved] btrfs no space left on device

the just deleted all snapshots, and made current ones.  im still getting the same error

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,104

Re: [solved] btrfs no space left on device

What error? Where? On pacman upgrade? How much space did that free up? Have you considered that you're actually running out of space.

Last edited by V1del (2024-01-19 14:36:53)

PranshuTG

Member

Registered: 2022-04-01

Posts: 89

Re: [solved] btrfs no space left on device

the error "no space left on device" when im using paru to build an AUR package and it downloads a git repo.

Last edited by PranshuTG (2024-01-19 14:21:34)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,104

Re: [solved] btrfs no space left on device

Which git repo? if you're going to download a kernel or similarly sized project that will be gigabytes of repository history and you only have 16 available.

Maybe just post the actual verbatim output of what you're trying to do and when you get which exact error.

Last edited by V1del (2024-01-19 14:38:14)

PranshuTG

Member

Registered: 2022-04-01

Posts: 89

Re: [solved] btrfs no space left on device

fstrim and just waiting worked