I do not use home for your user storage, but instead symlink all my storage locations to your home
Not sure why your setup would be an issue. I just included my home directory in timeshift's settings and created a snapshot an it was not a problem.
Are you symlinking a garbage file system such as NTFS into your home directory? If so, that may be your issue.
My home is a separate partition, is this the problem?
~ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS loop0 7:0 0 55.4M 1 loop /var/lib/snapd/snap/core18/2074 loop1 7:1 0 110.9M 1 loop /var/lib/snapd/snap/sosumi/15 loop2 7:2 0 162.9M 1 loop /var/lib/snapd/snap/gnome-3-28-1804/145 loop3 7:3 0 65.1M 1 loop /var/lib/snapd/snap/gtk-common-themes/1515 loop4 7:4 0 32.3M 1 loop /var/lib/snapd/snap/snapd/12398 loop5 7:5 0 290.5M 1 loop /var/lib/snapd/snap/photogimp/141 loop6 7:6 0 164.8M 1 loop /var/lib/snapd/snap/gnome-3-28-1804/161 loop7 7:7 0 61.7M 1 loop /var/lib/snapd/snap/core20/1026 loop8 7:8 0 260.7M 1 loop /var/lib/snapd/snap/kde-frameworks-5-core18/32 loop9 7:9 0 225.3M 1 loop /var/lib/snapd/snap/riseup-vpn/172 loop10 7:10 0 431.3M 1 loop /var/lib/anbox/rootfs sda 8:0 0 931.5G 0 disk ├─sda1 │ 8:1 0 1G 0 part /boot/efi ├─sda2 │ 8:2 0 100G 0 part /var/lib/anbox/rootfs/data │ /var/lib/anbox/rootfs/cache │ /root │ /var/log │ /var/cache │ /srv │ /var/tmp │ / ├─sda3 │ 8:3 0 100G 0 part /home ├─sda4 │ 8:4 0 16M 0 part ├─sda5 │ 8:5 0 324.5G 0 part ├─sda6 │ 8:6 0 280G 0 part /run/media/austin/5914db71-e77a-474e-8143-edad647064bd ├─sda7 │ 8:7 0 6G 0 part [SWAP] ├─sda8 │ 8:8 0 20G 0 part /mnt/data ├─sda9 │ 8:9 0 50G 0 part └─sda10 8:10 0 50G 0 part sr0 11:0 1 1024M 0 rom zram0 254:0 0 11.4G 0 disk [SWAP]
Can we see the output of
░▒▓ ~ findmnt /home ✔ ▓▒░ TARGET SOURCE FSTYPE OPTIONS /home /dev/sda3 btrfs rw,noatime,compress=zstd:3,space_cache,autodefrag,subvolid=5,subvol=/
I am fairly certain that timeshift requires your subvolumes to start with
@. I am nearly positive it won't support snapping the root of a btrfs partition.
I don't know if it supports snapshotting subvolumes across separate partitions.
A quick test would be to logout, switch a TTY and login as root. The do this:
btrfs subvolume snapshot /home /home/@home umount /home mount /dev/sda3 /home -o rw,noatime,compress=zstd:3,space_cache,autodefrag,subvolid=5,[email protected]
Switch back to your graphical session, log in as your normal user and try timeshift again.
If it works, update
/etc/fstab with the new subvolume.
But root snapshots work, it's only a problem with home partition.
I will update you soon after following your instructions.
I think you are confusing the root of the btrfs partition with your root filesystem. aka
More than likely, your root filesystem is not mounted at the root of your partition. It is probably in a subvolume named
This is actually what happened,
I logged out and switched to TTY and ran the first command:
btrfs subvolume snapshot /home /home/@home- it worked
Then, I tried the second command:
umount /home- it gave error
umount: /home: target is busy.
I tried rebooting, and switching directly to TTY without logging in to graphical session, still didn't work.
Then, I had to remove
/etc/fstaband then reboot.
Now the /home directory was not mounted!
Then I tried the third command:
mount /dev/sda3 /home -o rw,noatime,compress=zstd:3,space_cache,autodefrag,subvolid=5,[email protected]
it gave me errors -->
- Then I tried to directly add the subvolume to
UUID=b04944ca-424b-4c09-8597-ded059f54bf5 /home btrfs subvol=/@home,defaults,noatime,space_cache,autodefrag,compress=zstd 02
Then I rebooted and logged in back to the graphical Interface. /home was mounted!
I created a snapshot from Timeshift, with /home enabled,
And it worked!
Thanks a lot @dalto
Now, I want to learn how all this BTRFS works.
Please suggest, if you know any nice source.
I think your image link is broken.
I am not sure if it succeeded or failed.
@dalto I have edited the above post.
Please do check, if I have done it correctly.
Now my question is why didn't it work out-of-the box for me, but it worked for others?
Your subvolumes seem to be setup wrong. Timeshift specifically requires
@home subvolumes. Now that its been fixed it works.
This is because you logged into the TTY as
austin which puts the partition in use. You need to login to the TTY as
root so that
/home doesn't get used.
That is my fault, you need to remove the
subvolid=5 part. Sorry about that.
Yes. That works because you didn't add the wrong part I gave you
A great idea!
I don't know of one. I learned about btrfs by trying to do things, those things not working and me having to figure out how to fix them.
That being said, there probably is some stuff out there somewhere.
Because you created a separate
/home partition which is a pretty non-standard thing to do on a btrfs install. In that case, the installer doesn't create the
One last important thing:
You need to cleanup the duplicate data in your btrfs partition.
Please be careful with this as we will be deleting data. You don't need to do it from a TTY, you can use a normal terminal. It is something like this:
sudo mkdir /mnt/oldhome sudo mount /dev/sda3 /mnt/oldhome ls /mnt/oldhome
What you should see when you ls is something like this:
If you see something different, report back before deleting things.
If that is what you see then you should be able to delete that extra
austin directory in
As always, it is a good idea to have backups on a separate disk before you delete things.
So when I did
I got the following results:
sudo rm -rf austin guest
timeshift-btrfs is it supposed to be there?
Thanks a lot for supporting me
That is probably your timeshift snapshots. I would leave that one alone.
I think you are good now.
If you want to double check you can use:
sudo btrfs subvolume list /home
That should show
@home and all the timeshift snapshots.
~ sudo btrfs subvolume list /home ID 351 gen 73350 top level 5 path @home ID 352 gen 73266 top level 5 path timeshift-btrfs/snapshots/2021-07-16_23-52-56/@home ID 353 gen 73266 top level 5 path timeshift-btrfs/snapshots/2021-07-17_08-00-01/@home ID 354 gen 73266 top level 5 path timeshift-btrfs/snapshots/2021-07-17_08-43-24/@home ID 355 gen 73266 top level 5 path timeshift-btrfs/snapshots/2021-07-17_12-14-37/@home
Mission successful I think!
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