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====== Proxmox - Disks - Remove Device Mapper usage ======

List the disk partitions

<code bash>
lsblk -f
</code>

returns:

<code bash>
NAME                   FSTYPE      LABEL UUID                                   FSAVAIL FSUSE% MOUNTPOINT
sda                                                                                            
├─sda1                                                                                         
├─sda2                 vfat              8B1B-5126                               510.7M     0% /boot/efi
└─sda3                 LVM2_member       MA9I5I-auY3-MWGS-94Ad-6x3k-uuXl-nlhNQ9                
  ├─pve-swap           swap              3c213912-aa63-4daf-a2f1-c7926012e862                  [SWAP]
  ├─pve-root           ext4              7673ba15-2fd7-4dd2-844a-fda9850af328     51.3G     5% /
  ├─pve-data_tmeta                                                                             
  │ └─pve-data                                                                                 
  └─pve-data_tdata                                                                             
    └─pve-data                                                                                 
sdb                                                                                            
sdc                                                                                            
└─VM1-vm--100--disk--0                                                                         
sdd                                                                                            
sr0                                    
</code>

<WRAP info>
**NOTE:**  The **sdc** disk shows that **VM1-vm--100--disk--0**.

The usual approach to remove a partition from a disk does not work; i.e. by running this:

<code bash>
fdisk /dev/sdc
</code>

  * **p** (to print partitions),
  * and **d** (to delete a partition),
  * and **w** to write.

</WRAP>


----

===== Solution =====

Try the following options:

<WRAP important>
**WARNING:**  Ensure the correct device is used with these commands, as it will wipe all the data on the specified disk!
</WRAP>


<code bash>
wipefs -a -f /dev/sdc partprobe /dev/sdc pvesm scan
</code>

or

<code bash>
gdisk /dev/sdc
</code>

  * then **x** for extra commands.
  * then **z** for zap.

or

<code bash>
sgdisk --zap-all /dev/sdc
</code>

<WRAP info>
**NOTE:**  A reboot might be needed of Proxmox to show the fresh results.
</WRAP>