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--- proxmox:disks:remove_device_mapper_usage [2021/06/14 13:08] – created peter
+++ proxmox:disks:remove_device_mapper_usage [2021/06/14 13:16] (current) – [Solution] peter
@@ Line 1: / Line 1: @@
 ====== 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>