Hi All A picture worth a thousands words ...see attached "alphacore_moved" is the one complaining Someone deleted the metadata entry that looked like this "ff576e35-2363-4e25-aa7a-e4a81693ab20" I think one can replicate the issue by creating a volume with few subvolumes, mount at the volume level and then delete subvolume metadata file Is there anyway to recreate it ? Is there any other way to fix this without downtime ? Should I be worried and move data from the volume? [image: image.png] On Wed, 29 Oct 2025 at 08:56, Venky Shankar <vshankar@redhat.com> wrote:

Hi Eugen,

On Wed, Oct 29, 2025 at 4:29 PM Eugen Block <eblock@nde.ag> wrote:

...

Hi,

could you add more details what exactly happened? I tried to reproduce by simply removing the entire directory within a subvolume group, but I still see the getpath output. Obviously, I'm doing something differently here.

The path is taken from the subvolume metadata file. If you remove that, you would see something similar (warning: don't do it on prod).

...

Thanks, Eugen

Zitat von Steven Vacaroaia <stef97@gmail.com>:

...

Hi,

I have a cephfs subvolume ( out of 4) with " mount path missing "

issue

...

...

I think a user deleted it as it look different than regular data to him/her

I am mounting at the group level so all subgroups are available under same path

How concerned should I be ? Is there a way to recreate path on a cephfs subvolume ? what are my options for fixing it ?

Please find below details

Mounting /volumes/projects /projects/cephfs

Cephfs status ceph fs status project_ec_ssd project_ec_ssd - 139 clients ============== RANK STATE MDS ACTIVITY DNS INOS DIRS CAPS 0 active project_ec_ssd.ceph-host-5.henbit Reqs: 0 /s 6198k 6054k 1645k 107k 1 active project_ec_ssd.ceph-host-7.emayje Reqs: 0 /s 194 197 340 629 2 active project_ec_ssd.ceph-host-3.qebqlz Reqs: 0 /s 192 196 339 644 3 active project_ec_ssd.ceph-host-1.bwtdlt Reqs: 0 /s 196 199 338 729 4 active project_ec_ssd.ceph-host-4.xsoerf Reqs: 0 /s 196 200 339 93 POOL TYPE USED AVAIL metadata_fs_ssd metadata 18.0G 92.8T ssd_ec_project data 183T 241T

ceph fs subvolumegroup ls project_ec_ssd [ { "name": "projects" } ]

ceph fs subvolume ls project_ec_ssd --group_name projects [ { "name": "systems_archive" }, { "name": "arescore_moved" }, { "name": "alphacore_moved" }, { "name": "schematics" } ]

ceph fs subvolume getpath project_ec_ssd alphacore_moved --group_name projects Error ENOENT: mount path missing for subvolume 'alphacore_moved'

ceph fs subvolume getpath project_ec_ssd arescore_moved --group_name projects /volumes/projects/arescore_moved/ff576e35-2363-4e25-aa7a-e4a81693ab20

Many thanks Steven _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io

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-- Cheers, Venky _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io