Page 1 of 1
BTRFS were is the root partition
Posted: Thu Sep 30, 2021 3:11 pm
by Gps
I hope I can get a simple answer here.
Were is my root partition and how big is on my BTRFS formatted disk? (opensuse tumbleweed)
For days now I searching for this simple question, and I am becoming so annoyed I am tempted, to reinstall opensuse with ext4.
Off course I googled, but I only find answers to things I am not asking.
Code: Select all
sudo parted -l
[sudo] wachtwoord voor root:
Model: ATA WDC WD10EZEX-08W (scsi)
Disk /dev/sda: 1000GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 556MB 555MB ntfs Basic data partition hidden, diag
2 556MB 660MB 104MB fat32 EFI system partition boot, esp
3 660MB 676MB 16,8MB Microsoft reserved partition msftres
4 676MB 1000GB 1000GB ntfs Basic data partition msftdata
Model: ATA ST1000DM010-2EP1 (scsi)
Disk /dev/sdb: 1000GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 525MB 524MB fat16 boot, esp
2 525MB 27,0GB 26,5GB ext4
3 27,9GB 998GB 970GB xfs
4 998GB 1000GB 2148MB linux-swap(v1) swap
Model: Samsung SSD 980 1TB (nvme)
Disk /dev/nvme0n1: 1000GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 538MB 537MB fat32 boot, esp
2 538MB 1000GB 1000GB btrfs
Very happy though with the new ssd, its very fast when installing stuff. Blink once and installation is done.
Re: BTRFS were is the root partition
Posted: Thu Sep 30, 2021 4:25 pm
by Gps
Posted this question on the openSUSE forum too, started a new topic with only 1 question.
How big is my root partition.
Fingers crossed I get an answer. I am in bad mood right now, because I lost count on how many pages I read about BTRFS but no answer to this simple question.
Re: BTRFS were is the root partition
Posted: Thu Sep 30, 2021 4:32 pm
by Loki Harfagr
Re: BTRFS were is the root partition
Posted: Thu Sep 30, 2021 7:20 pm
by Gps
Code: Select all
df -hTl
Filesystem Type Size Used Avail Use% Mounted on
devtmpfs devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs tmpfs 3.2G 9.8M 3.1G 1% /run
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /
tmpfs tmpfs 7.8G 0 7.8G 0% /tmp
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /.snapshots
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /boot/grub2/i386-pc
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /boot/grub2/x86_64-efi
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /home
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /opt
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /root
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /srv
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /usr/local
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /var
/dev/nvme0n1p1 vfat 511M 5.1M 506M 1% /boot/efi
tmpfs tmpfs 1.6G 48K 1.6G 1% /run/user/1000
Waiting on openSUSE forum too, I am getting help.
On the bright side, because of btrfs, I could go back to after the install of tumbleweed.
It will not surprise many here, I already installed LMMS.
Edit: Thank you, I panicked to soon, there is a home and root partition on my ssd.
I need to do some reading about btrfs. I do not understand that 21 % nor the 932G, or should I say, why they are all the same.
Re: BTRFS were is the root partition
Posted: Fri Oct 01, 2021 8:26 am
by Loki Harfagr
Well, as you printed from 'df -hTl' result, don't panic, here are your root, home and root user's home, all on second slice of your NVME SSD:
Code: Select all
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /home
/dev/nvme0n1p2 btrfs 932G 194G 738G 21% /root
I'd prolly be safer to use a separate partition (likely /dev/nvme0n1p3) for your /home and your root / but that's your decision
Re: BTRFS were is the root partition
Posted: Fri Oct 01, 2021 9:31 am
by Largos
@Gps All the ones with 21% are btrfs subvolumes on the same partition, which is 932G in total and is 21% full overall. The subvolumes use any of the space there is on the partition they are on. I use btrfs on ubuntu and there are two subvolumes root and home. The home subvolume ("@home") contains everything in the /home folder. The root subvolume ("@") contains everything except what is in the home subvolume. The opensuse has more subvolumes but without seeing myself, should/could be functionally the same.
I can see what is in each subvolume by finding out the partition UUID with the "blkid" command and then
Code: Select all
mount /dev/disk/by-uuid/DISK UUID /mnt
This then shows the contents of subvolumes in the /mnt folder. Opensuse might have different/better ways of doing this.
The best part of btrfs is you can do incremental backups of subvolumes (snapshots). I think Opensuse uses snapper, which is very good. I use that to create regular snapshots which enable me to have an "undo button" for if I bork my system doing something silly.
Re: BTRFS were is the root partition
Posted: Fri Oct 01, 2021 10:05 pm
by Gps
Thank you, after a slight panic attack, I am starting to see the light again.
Opensuse forum confirmed nothing wrong with the install.
BTRFS (better FS
) was causing my panic and confusion.
There is something going on were the partitions do not have a fixed size, as we are used too.
The file tree is different.
Somebody on the openSUSE forum called the subvolumes ghost partitions.
Most Ubuntu commands work on openSUSE too. I have fixed steam issues with "Ubuntu" solutions.
Were it differs is with installing stuff. No apt get but zypper something.
Updating tumbleweed, type in the console: sudo zypper dup.
Re: BTRFS were is the root partition
Posted: Sun Oct 17, 2021 7:22 pm
by Gps
All of this because I had a warning my root partition was low on space.
The cause probably being, installing a lot of programs (and compiling programs), and running a virtual machine which used the root partition.
Should all be fixed, just installed win 10 in the new virtual machine. (to run an online game)
Now it uses a partition outside of the root, even on another hard disk.
Now finally back to reading up on pipewire. I remember were I got stuck, because of that other issue.
I needed to install two things. Not pipewire it self, because that is already installed.
I had started a topic on the opensuse forums, now I can finish it.