Undo lvextend local-lvm thin pool "data" proxmox without losing data

[hendropr]

Hi All,

I have a problem when extending local-lvm thin pool "data" with a new disk. LVM Proxmox Web shows full suddenly (100% usage and 0% free) although the new disk has no data after I entered the command "lvextend -l +100%FREE dev/data". I think I use the wrong command. Anyone can help to guide me to undo it, and extend correctly and so it displays normally (not 100%). any help will be very much appreciated. Thank you.

Best Regards,
Hendro

 

[Alwin]

LVM Proxmox Web shows full suddenly (100% usage and 0% free) although the new disk has no data after I entered the command "lvextend -l +100%FREE dev/data".

The VG (volume group) has no space available, since all PV (physical volume) are used 100% by LVM. The lvm-thin data LV (logical volume) is only used by 1%. For illustration see the link.
https://cdn.thegeekdiary.com/wp-content/uploads/2014/10/LVM-basic-structure.png