VM / VM template local-lvm: Which disk is it using?

T

tuathan

Member
May 23, 2020
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I have created some VMs and VM templates on a PVE node for testing. The node has a SSD and 4 SAS drives. I installed PVE on the SSD drive and assumed when i selected local-lvm as the VM disks the VMs would all use the SSD for storage too. When I look under Node > Disks now I see that the usage for the SSD disk and 2 of the SAS disks is "LVM". I want to create a RAIDZ zpool on the 4 SAS disks now. Is it safe to clear the partitions from the SAS disks? How can I check if any of the VM templates / VM are using the SAS/LVM?
 
OK I think I figured out that everything (i.e. all the VM and VM template storage) is on the SSD (sda) by running:

# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 223.6G 0 disk
├─sda1 8:1 0 1007K 0 part
├─sda2 8:2 0 512M 0 part
└─sda3 8:3 0 223.1G 0 part
├─pve-swap 253:3 0 8G 0 lvm [SWAP]
├─pve-root 253:4 0 55.8G 0 lvm /
├─pve-data_tmeta 253:5 0 1.4G 0 lvm
│ └─pve-data-tpool 253:7 0 140.5G 0 lvm
│ ├─pve-data 253:8 0 140.5G 0 lvm
│ ├─pve-base--100--disk--0 253:9 0 32G 1 lvm
│ ├─pve-vm--102--disk--0 253:11 0 40G 0 lvm
│ ├─pve-base--103--disk--0 253:12 0 40G 1 lvm
│ └─pve-vm--104--disk--0 253:13 0 40G 0 lvm
└─pve-data_tdata 253:6 0 140.5G 0 lvm
└─pve-data-tpool 253:7 0 140.5G 0 lvm
├─pve-data 253:8 0 140.5G 0 lvm
├─pve-base--100--disk--0 253:9 0 32G 1 lvm
├─pve-vm--102--disk--0 253:11 0 40G 0 lvm
├─pve-base--103--disk--0 253:12 0 40G 1 lvm
└─pve-vm--104--disk--0 253:13 0 40G 0 lvm
sdb 8:16 0 558.9G 0 disk
├─sdb1 8:17 0 300M 0 part
├─sdb2 8:18 0 100M 0 part
├─sdb3 8:19 0 128M 0 part
└─sdb4 8:20 0 558.4G 0 part
└─mpbmtest--vg2-mpbmtest_backuplv 253:2 0 50G 0 lvm
sdc 8:32 0 558.9G 0 disk
├─sdc1 8:33 0 243M 0 part
├─sdc2 8:34 0 1K 0 part
└─sdc5 8:37 0 558.7G 0 part
├─mpbmtest--vg-root 253:0 0 526.8G 0 lvm
└─mpbmtest--vg-swap_1 253:1 0 31.9G 0 lvm
sdd 8:48 0 558.9G 0 disk
sde 8:64 0 558.9G 0 disk
sr0 11:0 1 1024M 0 rom

I think it must have been an experiment I forgot I did on the two SAS disks... I will proceed by clearing them prior to configuring for RAIDZ.
 
I've tried:

fdisk /dev/sdc

d (delete partition)

Select partition number (REPEAT)

w (write changes)

q (quit)

and:

vgreduce pve /dev/sdc

but get message:

Failed to find physical volume "/dev/sdc"
 
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