On Tue, Jan 30, 2018 at 4:29 PM, Elad Ben Aharon <ebenahar@redhat.com> wrote:
Try to deactivate this LV:

lvchange -an /dev/f7b481c8-b744-43d4-9faa-0e494a308490/6d23ec3e-79fb-47f0-85ff-08480476ea68

# lvchange -an /dev/f7b481c8-b744-43d4-9faa-0e494a308490/6d23ec3e-79fb-47f0-85ff-08480476ea68
  Logical volume f7b481c8-b744-43d4-9faa-0e494a308490/6d23ec3e-79fb-47f0-85ff-08480476ea68 is used by another device.

 # fuser /dev/f7b481c8-b744-43d4-9faa-0e494a308490/6d23ec3e-79fb-47f0-85ff-08480476ea68
#

# ll /dev/f7b481c8-b744-43d4-9faa-0e494a308490/6d23ec3e-79fb-47f0-85ff-08480476ea68
lrwxrwxrwx. 1 root root 8 Jan 29 20:29 /dev/f7b481c8-b744-43d4-9faa-0e494a308490/6d23ec3e-79fb-47f0-85ff-08480476ea68 -> ../dm-42
#

# fuser /dev/dm-42 
# 

Can I try to restart vdsmd, perhaps?

Gianluca