Ubuntu – Can’t remove LVM thinpool – unable to deactivate tdata, tmeta

lvmpartitionUbuntu

I somehow messed up some thinly provisioned lvm volumes on ubuntu 14.04 and now I want to start fresh by deleting the thinpool with all its volumes and data inside. Unfortunatelly this failes and I can't find a solution.

The logical volumes look like this:

user@server1:~$ sudo lvs
  dm_report_object: report function failed for field data_percent
  LV             VG   Attr      LSize   Pool       Origin Data%  Move Log Copy%  Convert
  project2       vg0  Vwi-i-tz-  22.00g mythinpool       
  project1       vg0  Vwi---tz-  20.00g mythinpool                                      
  project3       vg0  Vwi---tz-  21.00g mythinpool                                      
  home           vg0  -wi-ao--- 140.00g                                                 
  mythinpool     vg0  twi-i-tz-  78.82g                    52.15                        
  root           vg0  -wi-ao---  10.00g                                                 
  swap           vg0  -wi-ao---   4.00g                                                 
  tmp            vg0  -wi-ao---   5.00g

Now I want to remove the thinpool with the three lvms inside:

sudo lvremove /dev/vg0/mythinpool

Removing pool mythinpool will also remove 3 thin volume(s). OK? [y/n]: y
Do you really want to remove and DISCARD logical volume project1? [y/n]: y
  device-mapper: message ioctl on  failed: Invalid argument
  Unable to deactivate open vg0-mythinpool_tdata (252:5)
  Unable to deactivate open vg0-mythinpool_tmeta (252:4)
  Failed to deactivate vg0-mythinpool-tpool
  Failed to resume mythinpool.
  Failed to update thin pool mythinpool.

I don't care about the data inside mythinpool, but the rest of the volume group vg0 MUST stay intact. How could I solve this problem? Thank you for any help on this.

EDIT 1:
After following the answer from shodanshok I was able to remove one LVM-Image by booting into CentOS7, but unfortunatelly the other two volumes including thin pool return another error message – transaction_id mismatch:

enter image description here

There is also no space available for lvconvert –repair

Best Answer

I finaly solved it very with some simple steps as described here: remove corrupt LVM thin pool

vgcfgbackup -f  vg.bak   vgname

//edit vg.bak and remove all thinp related volumes

vgcfgrestore -f vg.bak  vgname

After following the advice from @shodanshok to boot into Live CentOS7 sticked to the server on an USB stick, I was able to issue the described commands and to eventually get rid of the corrupt thin pool without damaging the root file system that resides inside the same volume group.

Thank you everybody for your helpful advice that led eventually to the solution.

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