DEVICE OR RESOURCE BUSY
1、umount -lf  挂载点
2、fuser -m 挂载磁盘，找到进程后杀死
3、lsof   挂载磁盘
4、dmsetup remove 挂载磁盘(尽量不要用dmsetup remove_all)
5、已经umount并且没有找到相应的进程
通过dmsetup  ls或者dmsetup info 查找挂载磁盘的 主设备号码和副设备号码
lsof | grep
6、如果有监控主机对此主机添加的监控，需要监控方面停止或删除对此主机的监控

注释：
使用dmsetup remove_al后，如果包含裸设备需执行下列操作
执行udevadm trigger，ls /dev查看时候生成设备名
启动裸设备rcraw start

CRM-Book:~ # dmsetup ls
[2020-03-17 12:14:48]
vg1-lv_tsm (254:2)
vg1-lv_home (254:1)
vg_data-lv_data (254:3)
vg1-lv_root (254:0)
CRM-Book:~ # dmsetup info
Name:              vg_data-lv_data
State:             ACTIVE
Read Ahead:        1024
Tables present:    LIVE
Open count:        1
Event number:      0
Major, minor:      254, 3
Number of targets: 2
UUID: LVM-XAMINeFPYbAKAUi3FAN3BWTigFAeVRfwvrzfFI9otme1snC6S0mBbd4ANBKNqmT1
---------------------------------------------------
注释：
Major, minor  主设备号码和副设备号码
----------------------------------------------------
CRM-Book:~ # cat /proc/mounts |grep data
CRM-Book:~ # lsof |grep "254,3"
netserver  45113  root  txt  REG  254,3  319118  12884902406  /install_check/net_test/netserver
CRM-Book:~ # ls -l /proc/45113
dr-xr-xr-x 2 root root 0 Mar 17 14:27 attr
-r-------- 1 root root 0 Mar 17 14:27 auxv
-r--r--r-- 1 root root 0 Mar 17 14:27 cgroup
--w------- 1 root root 0 Mar 17 14:27 clear_refs
-r--r--r-- 1 root root 0 Mar 14 16:47 cmdline
-rw-r--r-- 1 root root 0 Mar 17 14:27 comm
-rw-r--r-- 1 root root 0 Mar 17 14:27 coredump_filter
-r--r--r-- 1 root root 0 Mar 17 14:27 cpuset
lrwxrwxrwx 1 root root 0 Mar 14 17:46 cwd -> /tmp
-r-------- 1 root root 0 Mar 17 14:27 environ
lrwxrwxrwx 1 root root 0 Mar 14 16:54 exe -> /install_check/net_test/netserver
dr-x------ 2 root root 0 Mar 14 17:46 fd
dr-x------ 2 root root 0 Mar 14 17:46 fdinfo
-rw-r--r-- 1 root root 0 Mar 17 14:27 gid_map
-r-------- 1 root root 0 Mar 17 14:27 io
-r--r--r-- 1 root root 0 Mar 17 14:27 latency
-r--r--r-- 1 root root 0 Mar 17 14:27 limits
-rw-r--r-- 1 root root 0 Mar 17 14:27 loginuid
-rw-r--r-- 1 root root 0 Mar 17 14:27 make-it-fail
dr-x------ 2 root root 0 Mar 17 14:27 map_files
-r--r--r-- 1 root root 0 Mar 14 17:46 maps
-rw------- 1 root root 0 Mar 17 14:27 mem
-r--r--r-- 1 root root 0 Mar 17 14:27 mountinfo
-r--r--r-- 1 root root 0 Mar 17 14:27 mounts
-r-------- 1 root root 0 Mar 17 14:27 mountstats
dr-xr-xr-x 6 root root 0 Mar 17 14:27 net
dr-x--x--x 2 root root 0 Mar 17 14:27 ns
-r--r--r-- 1 root root 0 Mar 17 14:27 numa_maps
-rw-r--r-- 1 root root 0 Mar 17 14:27 oom_adj
-r--r--r-- 1 root root 0 Mar 17 14:27 oom_score
-rw-r--r-- 1 root root 0 Mar 17 14:27 oom_score_adj
-r-------- 1 root root 0 Mar 17 14:27 pagemap
-r-------- 1 root root 0 Mar 17 14:27 patch_state
-r-------- 1 root root 0 Mar 17 14:27 personality
-rw-r--r-- 1 root root 0 Mar 17 14:27 projid_map
lrwxrwxrwx 1 root root 0 Mar 14 17:46 root -> /
-rw-r--r-- 1 root root 0 Mar 17 14:27 sched
-r--r--r-- 1 root root 0 Mar 17 14:27 schedstat
-r--r--r-- 1 root root 0 Mar 17 14:27 sessionid
-rw-r--r-- 1 root root 0 Mar 17 14:27 setgroups
-r--r--r-- 1 root root 0 Mar 17 14:27 smaps
-r-------- 1 root root 0 Mar 17 14:27 stack
-r--r--r-- 1 root root 0 Mar 14 11:07 stat
-r--r--r-- 1 root root 0 Mar 14 17:15 statm
-r--r--r-- 1 root root 0 Mar 14 16:47 status
-r-------- 1 root root 0 Mar 17 14:27 syscall
dr-xr-xr-x 3 root root 0 Mar 17 09:59 task
-r--r--r-- 1 root root 0 Mar 17 14:27 timers
-rw-rw-rw- 1 root root 0 Mar 17 14:27 timerslack_ns
-rw-r--r-- 1 root root 0 Mar 17 14:27 uid_map
-r--r--r-- 1 root root 0 Mar 17 14:27 wchan
CRM-Book:~ # ls -l /proc/45113/fd/
[2020-03-17 14:28:17]
total 0
lr-x------ 1 root root 64 Mar 14 17:46 0 -> /dev/null
l-wx------ 1 root root 64 Mar 14 17:46 1 -> /tmp/netserver.debug_45113
l-wx------ 1 root root 64 Mar 14 17:46 2 -> /tmp/netserver.debug_45113
lrwx------ 1 root root 64 Mar 14 17:46 3 -> socket:[348307]
l-wx------ 1 root root 64 Mar 14 17:46 4 -> /tmp/netserver.debug_45113
lr-x------ 1 root root 64 Mar 14 17:46 5 -> /dev/null
CRM-Book:~ # kill -9 45113
[2020-03-17 14:30:29]
CRM-Book:~ # lvs
[2020-03-17 14:30:38]
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
lv_home vg1 -wi-ao---- 60.00g 
lv_root vg1 -wi-ao---- 144.52g 
lv_tsm vg1 -wi-ao---- 10.00g 
lv_data vg_data -wi-ao---- 21.83t 
CRM-Book:~ # lsof |grep "254,3"
[2020-03-17 14:30:55]