Hi.
Have a Linux Mint installation, and also have a 1TB HDD for file storage only, one single partition formatted with btrfs.
If I use the mount option subvol=@ in fstab, I get the error
Code:
$ sudo mount -a
[sudo] password for grobe:
mount: /terralager: mount(2) system call failed: No such file or directory.
If I remove the mount option subvol=@ in fstab, I can mount the partition without any issue.
Why is it so? What does subvol=@ mean, does it have a particular purpose?
How can I check or get a list of subvolumes on a btrfs volume ?
lsblk
Code:
sudo lsblk --fs
NAME FSTYPE LABEL UUID FSAVAIL FSUSE% MOUNTPOINT
sda
├─sda1 ext4 37f68ebe-1ea5-4cdd-ac94-a44d321f8d22 720,1M 21% /boot
├─sda2 btrfs Håom 4d3c5932-453b-4eb2-9a71-3c017b230cd7 43,3G 11% /home
├─sda3 btrfs lager1 879e6a15-206b-46c2-881f-197d79808eda 59,4G 72% /lager1
└─sda4 ext4 45c07f2f-eca6-4948-aaed-2471610b22d4 26,2G 3% /var
sdb
└─sdb1 btrfs terralager d77d3850-667c-43d8-a806-779286baa711
sdc
├─sdc1 swap 4cb64699-ed99-4431-9e28-37c50244d887 [SWAP]
└─sdc2 btrfs 746dc818-52db-4720-ba39-c26494ee3007 64,8G 8% /
sr0
working fstab file
Code:
sudo cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb2 during installation
UUID=746dc818-52db-4720-ba39-c26494ee3007 / btrfs defaults,subvol=@ 0 1
# /boot was on /dev/sda1 during installation
UUID=37f68ebe-1ea5-4cdd-ac94-a44d321f8d22 /boot ext4 defaults 0 2
# /home was on /dev/sda2 during installation
UUID=4d3c5932-453b-4eb2-9a71-3c017b230cd7 /home btrfs defaults,subvol=@home 0 2
# /lager1 was on /dev/sda3 during installation
UUID=879e6a15-206b-46c2-881f-197d79808eda /lager1 btrfs defaults 0 2
# /var was on /dev/sda4 during installation
UUID=45c07f2f-eca6-4948-aaed-2471610b22d4 /var ext4 defaults 0 2
# swap was on /dev/sdb1 during installation
UUID=4cb64699-ed99-4431-9e28-37c50244d887 none swap sw 0 0
#
# Terralager internal hdd extra storage space
UUID=d77d3850-667c-43d8-a806-779286baa711 /terralager btrfs defaults 0 1
