Volumes
```
patrick@fedora:~$ sudo btrfs subvolume list /
ID 256 gen 19536 top level 5 path @home
ID 257 gen 19536 top level 5 path @
ID 258 gen 19530 top level 5 path @data
ID 273 gen 15494 top level 258 path @data/admin/backups/volumes/home_20250130_0037
ID 274 gen 19360 top level 273 path @data/admin/backups/volumes/home_20250130_0037/home
ID 276 gen 19462 top level 258 path @data/admin/backups/volumes/home_20250204_0123
```
 
 
they are not mounted
```
>>> patrick@fedora:~$ mount | grep '/var/data/admin/backups/volumes/home_20250130_0037'
>>> patrick@fedora:~$ mount | grep '/var/data/admin/backups/volumes/home_20250130_0037/home'
```
 
but i can't delete them...
```
>>> patrick@fedora:~$ sudo btrfs subvolume delete /var/data/admin/backups/volumes/home_20250130_0037/home/
Delete subvolume 274 (no-commit): '/var/data/admin/backups/volumes/home_20250130_0037/home'
ERROR: Could not destroy subvolume/snapshot: Read-only file system
>>> patrick@fedora:~$ sudo btrfs subvolume delete /var/data/admin/backups/volumes/home_20250130_0037
Delete subvolume 273 (no-commit): '/var/data/admin/backups/volumes/home_20250130_0037'
ERROR: Could not destroy subvolume/snapshot: Directory not empty
```
 
there is also another folder inside, which seems not to be a subvolume, but I can't remove ith either
```
>>> patrick@fedora:~$ ls -l /var/data/admin/backups/volumes/home_20250130_0037/
total 0
drwxr-xr-x. 1 root    root     14 Jan  3 19:13 home
drwx------. 1 patrick patrick 502 Jan 29 23:24 patrick
 

>>> patrick@fedora:~$ sudo btrfs subvolume show /var/data/admin/backups/volumes/home_20250130_0037/patrick/
ERROR: Not a Btrfs subvolume: Invalid argument

>>> patrick@fedora:~$ sudo rm -rf /var/data/admin/backups/volumes/home_20250130_0037/patrick/
rm: cannot remove '/var/data/admin/backups/volumes/home_20250130_0037/patrick/.bash_logout': Read-only file system
rm: cannot remove '/var/data/admin/backups/volumes/home_20250130_0037/patrick/.bashrc': Read-only file system
rm: cannot remove '/var/data/admin/backups/volumes/home_20250130_0037/patrick/.mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}': Read-only file system
...
```

this is, what mount shows
```
patrick@fedora:~$ mount
/dev/mapper/luks-10474a4a-88a9-4afe-957a-c1a9598bf99a on /sysroot type btrfs (ro,relatime,seclabel,compress=zstd:1,ssd,space_cache=v2,subvolid=257,subvol=/@)
/dev/mapper/luks-10474a4a-88a9-4afe-957a-c1a9598bf99a on / type btrfs (rw,relatime,seclabel,compress=zstd:1,ssd,space_cache=v2,subvolid=257,subvol=/@)
/dev/mapper/luks-10474a4a-88a9-4afe-957a-c1a9598bf99a on /etc type btrfs (rw,relatime,seclabel,compress=zstd:1,ssd,space_cache=v2,subvolid=257,subvol=/@)
/dev/mapper/luks-10474a4a-88a9-4afe-957a-c1a9598bf99a on /usr type btrfs (ro,relatime,seclabel,compress=zstd:1,ssd,space_cache=v2,subvolid=257,subvol=/@)
/dev/mapper/luks-10474a4a-88a9-4afe-957a-c1a9598bf99a on /sysroot/ostree/deploy/fedora/var type btrfs (rw,relatime,seclabel,compress=zstd:1,ssd,space_cache=v2,subvolid=257,subvol=/@)
devtmpfs on /dev type devtmpfs (rw,nosuid,seclabel,size=4096k,nr_inodes=3545801,mode=755,inode64)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,seclabel,inode64)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime,seclabel)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,seclabel,nsdelegate,memory_recursiveprot)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime,seclabel)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
bpf on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run type tmpfs (rw,nosuid,nodev,seclabel,size=5704352k,nr_inodes=819200,mode=755,inode64)
tmpfs on /run/credentials/systemd-cryptsetup@luks\x2d10474a4a\x2d88a9\x2d4afe\x2d957a\x2dc1a9598bf99a.service type tmpfs (ro,nosuid,nodev,noexec,relatime,nosymfollow,seclabel,size=1024k,nr_inodes=1024,mode=700,inode64,noswap)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,nosuid,noexec,relatime)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=37,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=13851)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime,seclabel)
tracefs on /sys/kernel/tracing type tracefs (rw,nosuid,nodev,noexec,relatime,seclabel)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime,seclabel)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,nosuid,nodev,relatime,seclabel,pagesize=2M)
tmpfs on /run/credentials/systemd-journald.service type tmpfs (ro,nosuid,nodev,noexec,relatime,nosymfollow,seclabel,size=1024k,nr_inodes=1024,mode=700,inode64,noswap)
tmpfs on /run/credentials/systemd-network-generator.service type tmpfs (ro,nosuid,nodev,noexec,relatime,nosymfollow,seclabel,size=1024k,nr_inodes=1024,mode=700,inode64,noswap)
tmpfs on /run/credentials/systemd-udev-load-credentials.service type tmpfs (ro,nosuid,nodev,noexec,relatime,nosymfollow,seclabel,size=1024k,nr_inodes=1024,mode=700,inode64,noswap)
tmpfs on /run/credentials/systemd-tmpfiles-setup-dev-early.service type tmpfs (ro,nosuid,nodev,noexec,relatime,nosymfollow,seclabel,size=1024k,nr_inodes=1024,mode=700,inode64,noswap)
tmpfs on /run/credentials/systemd-sysctl.service type tmpfs (ro,nosuid,nodev,noexec,relatime,nosymfollow,seclabel,size=1024k,nr_inodes=1024,mode=700,inode64,noswap)
tmpfs on /run/credentials/systemd-tmpfiles-setup-dev.service type tmpfs (ro,nosuid,nodev,noexec,relatime,nosymfollow,seclabel,size=1024k,nr_inodes=1024,mode=700,inode64,noswap)
tmpfs on /run/credentials/systemd-vconsole-setup.service type tmpfs (ro,nosuid,nodev,noexec,relatime,nosymfollow,seclabel,size=1024k,nr_inodes=1024,mode=700,inode64,noswap)
/dev/mapper/luks-10474a4a-88a9-4afe-957a-c1a9598bf99a on /var type btrfs (rw,relatime,seclabel,compress=zstd:1,ssd,space_cache=v2,subvolid=257,subvol=/@)
fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,seclabel,nr_inodes=1048576,inode64)
/dev/nvme0n1p2 on /boot type ext4 (rw,relatime,seclabel)
/dev/mapper/luks-10474a4a-88a9-4afe-957a-c1a9598bf99a on /var/home type btrfs (rw,relatime,seclabel,compress=zstd:1,ssd,space_cache=v2,subvolid=256,subvol=/@home)
/dev/mapper/luks-10474a4a-88a9-4afe-957a-c1a9598bf99a on /var/data type btrfs (rw,relatime,seclabel,compress=zstd:1,ssd,space_cache=v2,subvolid=258,subvol=/@data)
/dev/nvme0n1p1 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=ascii,shortname=winnt,errors=remount-ro)
tmpfs on /run/credentials/systemd-tmpfiles-setup.service type tmpfs (ro,nosuid,nodev,noexec,relatime,nosymfollow,seclabel,size=1024k,nr_inodes=1024,mode=700,inode64,noswap)
tmpfs on /run/credentials/systemd-resolved.service type tmpfs (ro,nosuid,nodev,noexec,relatime,nosymfollow,seclabel,size=1024k,nr_inodes=1024,mode=700,inode64,noswap)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nosuid,nodev,noexec,relatime)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=2852172k,nr_inodes=713043,mode=700,uid=1000,gid=1000,inode64)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
jetbrains-toolbox on /tmp/.mount_jetbraNlvAkH type fuse.jetbrains-toolbox (ro,nosuid,nodev,relatime,user_id=1000,group_id=1000)
portal on /run/user/1000/doc type fuse.portal (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
```

And the filesystem is not ro
```
/dev/mapper/luks-... on /var/data type btrfs (rw,relatime,seclabel,compress=zstd:1,ssd,space_cache=v2,subvolid=258,subvol=/@data)
```