I recently re-organized the storage on my OMV4 NAS:
- Added 2 new hard drives.
- Changed labels of existing file systems (using e2label)
- Installed openmediavault-unionfilesystems in order to pool my storage (creating 2 pools: one using SSD caching, the other being the backing pool).
The OMV file-system configuration looks like this:
- "S850PRO_0" previously had no label (this is the OMV boot system)
- "S850PRO_3" was previously named "SSD"
- "WD40EFRX_2014" was previously named "NAS0": this will eventually become a SnapRAID parity disk
- "WD40EFRX_201701" and "WD40EFRX_201702" are the file systems on the new hard drives
- "WD20EARS_2010" was previously named "NAS1"
- "mergefs:backingPool" and "mergerfs:cachedPool" are, unsurprisingly, the pools
Everything OMV seems to work correctly, except I do not seem to be able to unmount "WD40EFRX_2014". I unmounted it using OMV once, but it remained visible in the OMV UI (even after applying the changes and rebooting). Clicking the "unmount" button again results in an error:
The XPath query '//system/fstab/mntent[(((((((fsname='/dev/sdb1' or fsname='/dev/disk/by-partuuid/de32045a-9bcb-478a-8516-92bdf23f444e') or fsname='/dev/disk/by-path/pci-0000:00:1f.2-ata-2-part1') or fsname='/dev/disk/by-id/ata-WDC_WD40EFRX-68WT0N0_WD-WCC4EJJTZ2AE-part1') or fsname='/dev/disk/by-label/WD40EFRX_2014') or fsname='/dev/disk/by-uuid/644608a4-01f7-4987-b2c7-a7714dd5ea26') or fsname='/dev/disk/by-id/wwn-0x50014ee26016323f-part1') or fsname='644608a4-01f7-4987-b2c7-a7714dd5ea26')]' does not return the requested number of 1 object(s).
ls -l /srv shows this:
root@Sirius:~# ls /srv -la
total 56
drwxr-xr-x 14 root root 4096 Nov 11 09:40 .
drwxr-xr-x 24 root root 4096 Nov 9 19:36 ..
drwxrwsr-x+ 5 root users 4096 Nov 10 21:32 86531979-48b9-42be-a7d1-e0d735bd7880
drwxrwsr-x+ 5 root users 4096 Nov 10 21:32 bff37521-4538-47bb-b2ef-45d2edd7b3ce
drwx------ 5 root root 4096 Nov 10 06:03 dev-disk-by-label-NAS0
drwx------ 5 root root 4096 Nov 10 06:03 dev-disk-by-label-NAS1
drwxrwsr-x+ 7 root users 4096 Nov 10 21:29 dev-disk-by-label-S850PRO_3
drwx------ 5 root root 4096 Nov 10 06:03 dev-disk-by-label-SSD
drwxrwsr-x+ 6 root users 4096 Nov 10 21:30 dev-disk-by-label-WD20EARS_2010
drwxrwsr-x+ 5 root users 4096 Nov 10 21:32 dev-disk-by-label-WD40EFRX_201701
drwxrwsr-x+ 5 root users 4096 Nov 10 20:55 dev-disk-by-label-WD40EFRX_201702
drwxr-xr-x 2 ftp nogroup 4096 Sep 2 09:43 ftp
drwxr-xr-x 2 root root 4096 Nov 10 19:13 mergerfs_backingPool
drwxr-xr-x 2 root root 4096 Nov 10 19:13 mergerfs_cachedPoolLines 7, 8, 10, 15 and 16 are not supposed to be there (the last two are the result of my fiddling around with the pool mount labels: that was stupid).
I adapted the /etc/openmediavault/config.xml and ran omv-mkconf fstab to clean this mess up: /etc/fstab no longer lists the offending mount-points.
I am guessing that the error I get when trying to amount "WD40EFRX_2014" stems from /srv/dev-disk-by-label-NAS0 still pointing to it...
How can I clean this up?