Re: Odd snapshot subvolume

[Andrei Borzenkov <arvidjaar@gmail.com>]

14.04.2025 17:34, Brian J. Murrell wrote:
> On my Fedora system I have the following:
> 
> $ sudo btrfs subvolume show /
> fedora_root
> 	Name: 			fedora_root
> 	UUID: 			c08a988c-ddd5-164e-b01e-51ac26bf018b
> 	Parent UUID: 		-
> 	Received UUID: 		-
> 	Creation time: 		2021-08-10 18:30:03 -0400
> 	Subvolume ID: 		258
> 	Generation: 		5029586
> 	Gen at creation: 	10
> 	Parent ID: 		5
> 	Top level ID: 		5
> 	Flags: 			-
> 	Send transid: 		0
> 	Send time: 		2021-08-10 18:30:03 -0400
> 	Receive transid: 	0
> 	Receive time: 		-
> 	Snapshot(s):
> 				fedora_root/previous-releases/f38_root
> 				fedora_root/previous-releases/f39_root
> 				fedora_root/previous-releases/f40_root.old
> 				fedora_root/previous-releases/f41_root
> 				previous-releases/f33_root
> 	Quota group:		n/a
> 
> All of the fedora_root/previous_releases/* snapshot subvolumes make
> sense to me.  There are all accessible at:
> 
> $ ls -l /previous-releases/
> total 0
> dr-xr-xr-x. 1 root root 378 May 31  2023 f38_root
> drwxr-xr-x. 1 root root 194 May 31  2023 f38_var
> dr-xr-xr-x. 1 root root 378 Nov 11  2023 f39_root
> drwxr-xr-x. 1 root root 194 Apr  1  2024 f39_var
> dr-xr-xr-x. 1 root root 362 Jun 15  2024 f40_root.old
> drwxr-xr-x. 1 root root 194 May 15  2024 f40_var.old
> dr-xr-xr-x. 1 root root 362 Jun 15  2024 f41_root
> drwxr-xr-x. 1 root root 194 May 15  2024 f41_var
> 
> But then there is that odd-duck snapshot "previous-releases/f33_root"
> not under "fedora_root" and not showing under /previous-releases in the
> filesystem's namespace.
> 
> How can I access that "previous-releases/f33_root" snapshot or even
> just remove it?
> 

mount -o subvol=/ /dev/whatever /mnt
ls /mnt/previous-releases