LVM with 100% Disk Usage after setup

[ahoi_]

Hello everybody,

I just installed Proxmox and would like to add LVM here.

So these are my disks:




Alright. If I now add a storage (LVM), I chose the group and added it:




Now I do see this volume, but it's 100% in use. And of course I cannot create a VM on that:

> TASK ERROR: unable to create VM 100 - not enough free space (0 < 33554432)



So now I am curious: What does Proxmox do with this LVM?

This is the overview over the volumes

  --- Logical volume ---
  LV Path                /dev/pve/root
  LV Name                root
  VG Name                pve
  LV UUID                My2gUJ-UPUq-7qRS-PvJu-avg4-UrNV-fUCs91
  LV Write Access        read/write
  LV Creation host, time pm1, 2021-04-10 11:19:57 +0200
  LV Status              available
  # open                 1
  LV Size                100,00 GiB
  Current LE             25600
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0
   
  --- Logical volume ---
  LV Path                /dev/pve/data
  LV Name                data
  VG Name                pve
  LV UUID                W6fbEe-h4Kl-PnCs-wRyI-uXUr-wXBf-GrLyqf
  LV Write Access        read/write
  LV Creation host, time pm1, 2021-04-10 11:19:57 +0200
  LV Status              available
  # open                 0
  LV Size                <3,61 TiB
  Current LE             945609
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

 

[Dunuin]

By default Proxmox will create two LVs while installing. One is for the root filesystem and storage for ISOs, Backups and so on and the other one is used as a storage for VMs/LXCs.

 

[ahoi_]

Alright, so this is the reason for the pve-data volume. But why can't I see this in Proxmox? What can I do to use this volume?

 

[dcsapak]

by default there should be a 'local-lvm' storage that is a lvm thinpool on top of lvm