Remove BTRFS Mount

[bumann]

Hi,

i want to switch from btrfs to zfs on my pve 8.3.
I delete the btrfs Storage from Cluster->storage.
Now i want to wipe the two disks to add them to zfs.
But system said disk/partition '/dev/sda' is mounted (500)
Can you tell me how to fix?

 

[dakralex]

Hi!

Is this an external storage added manually? If so, then the disk needs to be manually unmounted with umount /dev/sda. But just from my gut feeling, /dev/sda is usually the first disk attached and therefore often the installation medium if there's no other storage interface used (e.g. NVMe). If this is the Proxmox VE installation medium, then there's no straightforward process to easily convert from one filesystem to another.

 

[alexskysilk]

for more explicit assistance, post the output of
cat /etc/mtab
lsblk