Question - How to completely wipe a previously formatted LVM-thin drive

[sgeddy]

Hi,
I am totally new to Proxmox, and I'm not sure how to wipe a drive that used to be formatted as an LVM-thin drive. I was testing different options and created an LVM-thin vg on my drive through the GUI, then I tried to erase it to create a directory instead. I tried erasing it through fdisk and 'dd' by setting all the bytes to zero. It no longer shows in the GUI as a vg under LVM thin and vgdisplay does not show it either, however it does show in lsblk like this:
- sdc (disk)
|--ISOs-ISOs_tmeta (lvm)
| |--ISOs-ISOs (lvm)
|--ISOs-ISOs_tdata (lvm)
|--ISOs-ISOs (lvm)


How do I remove the lvm partitions on the disk (if that's the right wording), so the disk can be used as a directory?

Thanks in advance for your help.

 

[udo]

Hi,
pvremove is the right command for that.

But dd, work too - but must used sdc (and not an partition) as target and some MB zeroing.

Udo

 

[sgeddy]

Unfortunately, pvremove doesn't show sdc as an option when I tab complete. It only shows the drives that show up under LVM. I tried zeroing sdc (not any partition) again using dd and the disk shows as zeroed out but the LVM structure still shows up.

Anyone know how to remove the LVM structure of the drive when it DOES NOT show in pvremove or vgdisplay or anything like that?

 

[udo]

Hi,
that sound, that you wipe the disk on an active LVM - so the kernel has the info still open.

The normal way is deactivation of all LVs, remove VG and than remove PV.

If you do an reboot, the disk should displayed as empty.

Udo

 

[sgeddy]

That is good to know. Reboot did the trick. Thank you.