@cwebber After more than a decade hanging around in the #btrfs IRC channel, I formulated Darkling's First Law: The user hates their data.

@h4ckernews I'm running #btrfs right now on all my systems. And #BcacheFS seems not to be there yet in my opinion, as I need to mount subvolumes, which last I tried wasn't working out of the box.

But if you look at these graphs, it seems like it should be kept in mind for the future 👀

I'm in the process of converting an mdadm RAID10 to a btrfs RAID10 while preserving the data. My current strategy is:

· ✅ 1 of the 4 disks → btrfs
· ✅ enlarge that disk with another random btrfs disk
· ⏳ copy the 6TB borg repo from the remaining 3 mdadm disks to the new small btrfs pool
· ❓`borg check` the copied backup
· ❓ 3 mdadm disks → btrfs
· ❓ add all to btrfs pool
· ❓ let pool balance
· ❓ remove the random disk again

So far it's been going well 😅

#borgBackup #raid #btrfs #mdadm

Amazing was:

- Graphical installer can now format with #btrfs and set up full-disk encryption with #LUKS (it previously couldn't)

Very annoying roadblocks after installation were:

- git not preinstalled
- in #xfce there's no archive manager preinstalled to open zip files

#nixos

TIL: ""using #btrfs without an #initramfs is not recommended (if a new device is added to the rootfs, the system can no longer boot, as there is no way to register all devices)""

That quote is from https://lore.kernel.org/linux-btrfs/3e3164206d23ef991b9bd76dab6706238592cfb0.1789202516.git.wqu@suse.com/

Related quote: ""[...] mount will fail anyway. This can happen on systems without initramfs/initrd and root partition created with RAID1/10/5/6 profiles. […]"""

That one is from the Btrfs docs: https://btrfs.readthedocs.io/en/latest/mkfs.btrfs.html#multiple-devices

#Linux #kernel #LinuxKernel

Alt...

Screenshot from the first linked page

TUXEDO OS auf Debian-Testing-Basis steht zum Test bereit
https://linuxnews.de/tuxedo-os-auf-debian-testing-basis-steht-zum-test-bereit/ #tuxedoos #continuiousdebian #debian #btrfs #snapshots #linux #linuxnews

Ok, I think I'm getting in over my head on this computer problem, any help much appreciated! (Linux/Opensuse TW/KDE/btrfs)

Symptom: Everything that tries to save something to my home partition (configurations, sessions, kwallet, etc.) says that I have no space left, and thus won't work. Some programs won't even load (Vivaldi, Steam). Every file manager I have tells me that I do have space left.

History: Before this happened I had tried updating a game in Steam thinking that it would warn me if there wasn't enough room on the disk to do so (silly me). Then the whole desktop crashed and I had to restart.

Tried: 1) deleting several GB of files. I can now download files to /home, but all the other stuff still won't work.
2) running fsck from bootable flash drive. Mostly didn't do anything. Finally got it to tell me to use btrfs check instead (I am using btrfs).
3) I did that and it told me that there were errors. The only things that looked like errors was in "Checking free space tree" where it said "Space key logical (number) length (number) has no corresponding block group" twice with different numbers.
4) Not being terribly familiar with btrfs yet, I read the fine manual for btrfs check. There were lots of warnings about not trying to repair a btrfs without experienced help, else risking your volumes. So here I am.

#linux #opensuse #btrfs

It's been roughly a year since I switched three production servers to btrfs from zfs. No issues at all, less ram consumption, slightly quicker performance on backups, and no dkms rebuilding shyze when major upgrades come out. Pretty awesome. #btrfs #sysadmin #Linux #Debian #zfs

Fun fact.
Btrfs c'est bien, ça te fais gagner de la place (et pas qu'un peu)(et les Snapshot, mais pas encore testé).

Mais grub et os-prober, il aime pas.
C'est un comble quand même, ça fais des années que le format existe, et Grub ne sait même pas aller chercher dans des sous-volumes les kernel, initramfs et tout le toutim...

Faut faire à la mano, configurer une nouvelle entrée dans /etc/grub.d, pour qu'il veuille bien rajouter ton nouvel OS dans son menu...

J'ai mis une plombe à dépatouiller le truc.

(Appartement, Arch a os-prober-btrfs, mais pas Debian...)

#linux
#grub
#debian
#btrfs

Can anyone guess what my fix was for ”Why is Mattermost always down in the early morning hours!?” 😅

Hint: Maybe #borgBackup should by default ignore the very repo it is backup-ing into...

UPDATE: Sorry, wrongly blamed @borgbackup - the backup included a #btrfs #snapper snapshots directory (which itself included the borg repo *several times* 😅). Although the inodes are equal, so borg could check that...

Alt...

Matplotlib plot titled "BorgBackup Duration". x-axis: time (months from 2026-03 to 2026-07), y-axis: hours. A blue curve starts at zero and is now at around 9 hours.

Je viens de gagner 30Go en compressant les 3 plus gros répertoires d'une partition btrfs, grâce à la très bonne doc de @sebsauvage . Merci à lui.

https://sebsauvage.net/wiki/doku.php?id=btrfs

#btrfs

for #selfhosting, it will be enough,i'm confident that my service can endure a powercut, so snapshot will be fine.

i haven't figured out how i will manage off-site backup, maybe export a tar from borg ? or rsync the repo even if it's not advised.