# The lvconvert cmd should look more like an open volume deactivate attempt. Just a warning and then an error code.
[root@virt-485 ~]# lvremove VG/lvol0
  Logical volume VG/lvol0 contains a filesystem in use.
[root@virt-485 ~]# echo $?
5


 
kernel-5.14.0-490.el9    BUILT: Fri Aug  2 10:42:23 PM CEST 2024
lvm2-2.03.24-2.el9    BUILT: Wed Aug  7 09:41:45 PM CEST 2024
lvm2-libs-2.03.24-2.el9    BUILT: Wed Aug  7 09:41:45 PM CEST 2024
  
[root@virt-485 ~]# lvcreate --type striped -i 2 -L 25G VG
[root@virt-485 ~]# mkfs.xfs /dev/VG/lvol0
[root@virt-485 ~]# mount /dev/VG/lvol0 /mnt/lvol0
 
[root@virt-485 ~]# lvconvert --type thin-pool --pooldatavdo y VG/lvol0
  Thin pool volume with chunk size 64.00 KiB can address at most <15.88 TiB of data.
  WARNING: Converting VG/lvol0 to thin pool's data volume with metadata wiping.
  THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)
Do you really want to convert VG/lvol0? [y/n]: y
  Logical volume VG/lvol0 contains a filesystem in use.
  Aborting. Failed to deactivate logical volume VG/lvol0.
[root@virt-485 ~]# echo $?
5
 
[root@virt-485 ~]# lvs -a -o +devices
  LV             VG            Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert Devices                
  lvol0          VG            -wi-ao---- 25.00g                                                     /dev/sda(0),/dev/sdb(0)
  lvol1          VG            -wi------- 28.00m                                                     /dev/sda(3207)         
  pool_metadata0 VG            -wi-a----- 28.00m                                                     /dev/sda(3200)