diff --git a/linux_snapshot/dattobd_remove_filesystem_snapshot b/linux_snapshot/dattobd_remove_filesystem_snapshot
index 094d3844..16c9a63f 100644
--- a/linux_snapshot/dattobd_remove_filesystem_snapshot
+++ b/linux_snapshot/dattobd_remove_filesystem_snapshot
@@ -49,6 +49,7 @@ echo "Unmounting /dev/datto$NUM at /mnt/urbackup_snaps/$SNAP_ID..."
 
 if ! umount /mnt/urbackup_snaps/$SNAP_ID
 then
+	lsof | grep /mnt/urbackup_snaps/$SNAP_ID || true
     echo "Unmounting /mnt/urbackup_snaps/$SNAP_ID failed. Retrying in 10s..."
     sleep 10
     umount /mnt/urbackup_snaps/$SNAP_ID
diff --git a/linux_snapshot/lvm_remove_filesystem_snapshot b/linux_snapshot/lvm_remove_filesystem_snapshot
index 7b20979b..e46c9276 100644
--- a/linux_snapshot/lvm_remove_filesystem_snapshot
+++ b/linux_snapshot/lvm_remove_filesystem_snapshot
@@ -42,6 +42,7 @@ echo "Unmounting $VOLNAME at /mnt/urbackup_snaps/$SNAP_ID..."
 
 if ! umount /mnt/urbackup_snaps/$SNAP_ID
 then
+		lsof | grep /mnt/urbackup_snaps/$SNAP_ID || true
         sleep 10
         umount /mnt/urbackup_snaps/$SNAP_ID
 fi