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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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Question: Is btrfs's compress-force=zstd compatible with x-systemd.automount? (nerdbin.social)

submitted 1 year ago by eh@nerdbin.social to c/linux@lemmy.ml

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I couldn't find any documentation about this anywhere, but it seems like they do NOT work together

% rg -i storage /etc/fstab
UUID=7c16eaa0-a423-4e51-aa5c-116adf806511     /storage/disk1          btrfs           noatime,lazytime,compress-force=zstd:9,x-systemd.automount      0 0
UUID=567c5fc4-3cc5-4572-9d45-01e55d30647c     /storage/disk2          btrfs           noatime,lazytime,compress-force=zstd:9,x-systemd.automount      0 0
UUID=d0e1ec15-2699-4afa-9393-60ae3d4370b7     /storage/disk3          btrfs           noatime,lazytime,compress-force=zstd:9,x-systemd.automount      0 0

% mount | rg -i storage
systemd-1 on /storage/disk1 type autofs (rw,relatime,fd=52,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=16608)
systemd-1 on /storage/disk2 type autofs (rw,relatime,fd=53,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=16614)
systemd-1 on /storage/disk3 type autofs (rw,relatime,fd=54,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=16620)
/dev/sdc1 on /storage/disk2 type btrfs (rw,noatime,space_cache=v2,subvolid=5,subvol=/,x-systemd.automount)
/dev/sdb1 on /storage/disk3 type btrfs (rw,noatime,ssd,discard=async,space_cache=v2,subvolid=5,subvol=/,x-systemd.automount)
/dev/sda1 on /storage/disk1 type btrfs (rw,noatime,space_cache=v2,subvolid=5,subvol=/,x-systemd.automount)

running Arch (btw), if that makes any difference

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[–] r0b0@sopuli.xyz 5 points 1 year ago (1 children)

Are other subvolumes of those volumes mounted somewhere else, with other btrfs options? The btrfs options, including compress, are not applicable per subvolume.

[–] eh@nerdbin.social 2 points 1 year ago

All of these are "root" mounts. I don't explicitly mount any subvolumes (they get "implicitly" mounted as folders though)

[–] lemminer@lemmy.ml 4 points 1 year ago (1 children)

I don't know how to do it with systemd.automount but I've been using udisks to define defaults for mounting BTRFS: https://wiki.archlinux.org/title/Udisks#Default_mount_options

[–] InverseParallax@lemmy.world 2 points 1 year ago* (last edited 1 year ago)

Every day we stray further from Ritchie's light.

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