On Fri, Jul 16, 2021 at 11:15 AM Vojtech Juranek <vjuranek@redhat.com> wrote:
What to do to crosscheck what is using the device and so preventing the "-f" to complete?
can you try
dmsetup info /dev/mapper/36090a0d800851c9d2195d5b837c9e328
and check "Open count" filed to see if there is still anything open?
Also, you can try
fuser /dev/dm-2
to see which process is using the device
[root@ov301 ~]# dmsetup info /dev/mapper/36090a0d800851c9d2195d5b837c9e328 Name: 36090a0d800851c9d2195d5b837c9e328 State: ACTIVE Read Ahead: 256 Tables present: LIVE Open count: 1 Event number: 0 Major, minor: 253, 2 Number of targets: 1 UUID: mpath-36090a0d800851c9d2195d5b837c9e328 [root@ov301 ~]# fuser /dev/dm-2 [root@ov301 ~]# echo $? 1 [root@ov301 ~]# ll /dev/dm-2 brw-rw----. 1 root disk 253, 2 Jul 15 11:28 /dev/dm-2 I'm still unable to remove it: [root@ov301 ~]# multipath -f 36090a0d800851c9d2195d5b837c9e328 Jul 16 12:25:11 | 36090a0d800851c9d2195d5b837c9e328: map in use [root@ov301 ~]#