Hello, i recently powered off proxmox to update RAM in the homelab computer being used as a server and since then i get this error:
"unable to activate storage 'VM' - directory is expected to be a mount point but is not mounted: '/mnt/pve/VM'"
here is some information to help identify the problem

/dev/sdb the partions size is off for sdb1 and sdb2 as i do not see the lvm drive for 1000gb
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root@promox:~# fdisk -l /dev/sdb
Disk /dev/sdb: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: WDC WD10EZEX-08W
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x0307d821
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 4982527 4980480 2.4G fd Linux raid autod
/dev/sdb2 4982528 9176831 4194304 2G fd Linux raid autod
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root@promox:~# fdisk -l /dev/sdb
Disk /dev/sdb: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: WDC WD10EZEX-08W
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x0307d821
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 4982527 4980480 2.4G fd Linux raid autod
/dev/sdb2 4982528 9176831 4194304 2G fd Linux raid autod
root@promox:~# systemctl list-unit-files -t mount
UNIT FILE STATE VENDOR PRESET
-.mount generated -
dev-hugepages.mount static -
dev-mqueue.mount static -
mnt-pve-NAS.mount disabled enabled
mnt-pve-VM.mount enabled enabled
proc-fs-nfsd.mount static -
proc-sys-fs-binfmt_misc.mount disabled disabled
run-rpc_pipefs.mount static -
sys-fs-fuse-connections.mount static -
sys-kernel-config.mount static -
sys-kernel-debug.mount static -
sys-kernel-tracing.mount static -
12 unit files listed.
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root@promox:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 16M 0 part
└─sda2 8:2 0 931.5G 0 part
sdb 8:16 0 931.5G 0 disk
├─sdb1 8:17 0 2.4G 0 part
└─sdb2 8:18 0 2G 0 part
sdc 8:32 0 465.8G 0 disk
├─sdc1 8:33 0 16M 0 part
└─sdc2 8:34 0 465.7G 0 part
sdd 8:48 0 465.8G 0 disk
├─sdd1 8:49 0 2.4G 0 part
├─sdd2 8:50 0 2G 0 part
└─sdd3 8:51 0 461.2G 0 part
nvme0n1 259:0 0 238.5G 0 disk
├─nvme0n1p1 259:1 0 1007K 0 part
├─nvme0n1p2 259:2 0 512M 0 part
└─nvme0n1p3 259:3 0 238G 0 part
├─pve-swap 253:0 0 8G 0 lvm [SWAP]
└─pve-root 253:1 0 230G 0 lvm /
"unable to activate storage 'VM' - directory is expected to be a mount point but is not mounted: '/mnt/pve/VM'"
here is some information to help identify the problem

/dev/sdb the partions size is off for sdb1 and sdb2 as i do not see the lvm drive for 1000gb
------------------------------------------------------------------------------------------------------
root@promox:~# fdisk -l /dev/sdb
Disk /dev/sdb: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: WDC WD10EZEX-08W
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x0307d821
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 4982527 4980480 2.4G fd Linux raid autod
/dev/sdb2 4982528 9176831 4194304 2G fd Linux raid autod
------------------------------------------------------------------------------------------------------
root@promox:~# fdisk -l /dev/sdb
Disk /dev/sdb: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: WDC WD10EZEX-08W
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x0307d821
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 4982527 4980480 2.4G fd Linux raid autod
/dev/sdb2 4982528 9176831 4194304 2G fd Linux raid autod
root@promox:~# systemctl list-unit-files -t mount
UNIT FILE STATE VENDOR PRESET
-.mount generated -
dev-hugepages.mount static -
dev-mqueue.mount static -
mnt-pve-NAS.mount disabled enabled
mnt-pve-VM.mount enabled enabled
proc-fs-nfsd.mount static -
proc-sys-fs-binfmt_misc.mount disabled disabled
run-rpc_pipefs.mount static -
sys-fs-fuse-connections.mount static -
sys-kernel-config.mount static -
sys-kernel-debug.mount static -
sys-kernel-tracing.mount static -
12 unit files listed.
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root@promox:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 16M 0 part
└─sda2 8:2 0 931.5G 0 part
sdb 8:16 0 931.5G 0 disk
├─sdb1 8:17 0 2.4G 0 part
└─sdb2 8:18 0 2G 0 part
sdc 8:32 0 465.8G 0 disk
├─sdc1 8:33 0 16M 0 part
└─sdc2 8:34 0 465.7G 0 part
sdd 8:48 0 465.8G 0 disk
├─sdd1 8:49 0 2.4G 0 part
├─sdd2 8:50 0 2G 0 part
└─sdd3 8:51 0 461.2G 0 part
nvme0n1 259:0 0 238.5G 0 disk
├─nvme0n1p1 259:1 0 1007K 0 part
├─nvme0n1p2 259:2 0 512M 0 part
└─nvme0n1p3 259:3 0 238G 0 part
├─pve-swap 253:0 0 8G 0 lvm [SWAP]
└─pve-root 253:1 0 230G 0 lvm /