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Deleting Files and Snapshots does not free up space - UI shows no more snapshots to delete
My ReadyNAS 104, running OS 6.5 was getting tight on space a couple months ago (4 x 4Tb). I deleted all the snapshots, but the UI still shows the snapshots taking up a bunch of space. Fast forward to this month, and I am completely out of space on my NAS. I went in and deleted all of my Windows backup files/folders in the Backup share (4 Tb worth of data). Still have snapshots turned off, and still have no snapshot files. To my surprise, after I deleted the Windows backup files, my UI now shows ALL of that supposedly freed up space is now allocated to "Snapshots." I should have over 4 Tb free at this point, as I only have a little over 6 Tb of files total on the NAS now (of 16 Tb available) but my Readynas is telling me I am out of space. The system is not recognizing that the files have been deleted and that the snapshots are supposed to be deleted. I just completed scrub, rebalance, and defrag. Still I have no free space.
I have deleted a large number of files and space was not freed up. I have been deleting the files for over a month.
I have read a number of threads on this and tried to delete snapshots but the admin ui indicates that there are no snapshots.
I tried deleting snapshots using Timeline - shows *no* snapshots. Tried using recovery mode but there is no Recovery Mode Icon. I Tried browsing to the folder and clicking on "Recover Files" but that also shows *no* snapshots.
I used ssh to access the nas. There is no /data/.purge folder that is mentioned on some threads.
I use ssh and went to the Share and it appears that there are snapshots for the Share.
How can recover space / delete snapshots? I have seen mentioned in some threads that there mighe be a way to delete snapshots that were not correctly deleted.
If you are comfortable with the support implications of using SSH you could do e.g.
# touch /.force_snapshots_upgrade # systemctl restart readynasd
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You most likely have some old snapshots that weren't updated. As you already went to the back-end, can you see any output with the command: btrfs subvolume list -s /data (replace data with the name of your volume)? Alternatively, you can download the logs and look into btrfs.log
The location to store the snapshots was changed at some point. If your snapshots weren't updated to the new path for some reason, the GUI can't display them (so you can't delete them from the GUI), but as they're still present in the volume, they still take space and the btrfs statistics still show them.
- If the output of that command is empty, it means that there are no snapshots... Unless your volume is not called "data". In that case, as suggested by Sandshark, a balance might simply fix it. You can run from the GUI under System / Volumes, ang click on the gear. It might take a while though.
If there are snapshots (your volume is called something else than data), it's still possible to delete these snapshots, but we need to confirm that first.
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