[root@station1 ~]# cat /proc/partitions
major minor #blocks name
8 0 292421632 sda
8 1 307200 sda1
8 2 96361472 sda2
8 3 4194304 sda3
8 4 191557632 sda4
8 16 145752064 sdb
8 32 145752064 sdc
8 48 145752064 sdd
8 128 145752064 sdi
8 96 145752064 sdg
8 64 145752064 sde
8 80 145752064 sdf
8 144 145752064 sdj
8 112 145752064 sdh
8 160 145752064 sdk
8 176 145752064 sdl
8 208 145752064 sdn
8 192 145752064 sdm
8 224 145752064 sdo
8 240 145752064 sdp
65 0 145752064 sdq
65 16 145752064 sdr
65 32 145752064 sds
65 48 145752064 sdt
65 64 145752064 sdu
65 80 145752064 sdv
65 96 145752064 sdw
65 112 145752064 sdx
65 128 145752064 sdy
11 0 1048575 sr0
252 0 145752064 dm-0
252 1 145752064 dm-1
252 2 145752064 dm-2
252 3 145752064 dm-3
252 4 145752064 dm-4
252 5 145752064 dm-5
252 6 145752064 dm-6
252 7 145752064 dm-7
252 8 145752064 dm-8
252 9 145752064 dm-9
252 10 145752064 dm-10
252 11 145752064 dm-11
[root@station1 ~]# cd /dev/mapper/
[root@station1 mapper]# ls
control
[root@station1 mapper]# multipath
Jan 10 03:56:48 | /etc/multipath.conf does not exist, blacklisting all devices.
Jan 10 03:56:48 | You can run "/sbin/mpathconf --enable" to create
Jan 10 03:56:48 | /etc/multipath.conf. See man mpathconf(8) for more details
Jan 10 03:56:48 | DM multipath kernel driver not loaded
[root@station1 mapper]# /sbin/mpathconf --enable
[root@station1 mapper]# multipath -ll
[root@station1 mapper]# systemctl start multipathd
[root@station1 mapper]# systemctl enable multipathd
[root@station1 mapper]# multipath -ll
mpathe (36c81f66000c8c49f00000bce65a0f35a) dm-4 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:1:2 sdp 8:240 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:0:2 sdd 8:48 active ready running
mpathd (36c81f66000c8c496000008d365a0fe6f) dm-3 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:0:11 sdm 8:192 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:1:11 sdy 65:128 active ready running
mpathc (36c81f66000c8c49f00000bd665a0f471) dm-2 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:1:10 sdx 65:112 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:0:10 sdl 8:176 active ready running
mpathb (36c81f66000c8c496000008ce65a0fd23) dm-1 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:0:1 sdc 8:32 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:1:1 sdo 8:224 active ready running
mpatha (36c81f66000c8c49f00000bcc65a0f323) dm-0 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:1:0 sdn 8:208 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:0:0 sdb 8:16 active ready running
mpathl (36c81f66000c8c496000008d265a0fe3b) dm-11 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:0:9 sdk 8:160 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:1:9 sdw 65:96 active ready running
mpathk (36c81f66000c8c49f00000bd465a0f44a) dm-10 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:1:8 sdv 65:80 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:0:8 sdj 8:144 active ready running
mpathj (36c81f66000c8c496000008d165a0fdd9) dm-9 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:0:7 sdi 8:128 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:1:7 sdu 65:64 active ready running
mpathi (36c81f66000c8c49f00000bd265a0f3e1) dm-8 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:1:6 sdt 65:48 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:0:6 sdh 8:112 active ready running
mpathh (36c81f66000c8c496000008d065a0fdae) dm-7 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:0:5 sdg 8:96 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:1:5 sds 65:32 active ready running
mpathg (36c81f66000c8c49f00000bd065a0f3b9) dm-6 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:1:4 sdr 65:16 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:0:4 sdf 8:80 active ready running
mpathf (36c81f66000c8c496000008cf65a0fd54) dm-5 DELL,MD32xx
size=139G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='service-time 0' prio=14 status=active
| `- 1:0:0:3 sde 8:64 active ready running
`-+- policy='service-time 0' prio=9 status=enabled
`- 1:0:1:3 sdq 65:0 active ready running
[root@station1 mapper]# systemctl enable multipathd
[root@station1 mapper]# ls
control mpatha mpathb mpathc mpathd mpathe mpathf mpathg mpathh mpathi mpathj mpathk mpathl
[root@station1 mapper]# lsscsi -g
[0:2:0:0] disk DELL PERC H710 3.13 /dev/sda /dev/sg0
[1:0:0:0] disk DELL MD32xx 0784 /dev/sdb /dev/sg1
[1:0:0:1] disk DELL MD32xx 0784 /dev/sdc /dev/sg2
[1:0:0:2] disk DELL MD32xx 0784 /dev/sdd /dev/sg3
[1:0:0:3] disk DELL MD32xx 0784 /dev/sde /dev/sg4
[1:0:0:4] disk DELL MD32xx 0784 /dev/sdf /dev/sg5
[1:0:0:5] disk DELL MD32xx 0784 /dev/sdg /dev/sg6
[1:0:0:6] disk DELL MD32xx 0784 /dev/sdh /dev/sg7
[1:0:0:7] disk DELL MD32xx 0784 /dev/sdi /dev/sg8
[1:0:0:8] disk DELL MD32xx 0784 /dev/sdj /dev/sg9
[1:0:0:9] disk DELL MD32xx 0784 /dev/sdk /dev/sg10
[1:0:0:10] disk DELL MD32xx 0784 /dev/sdl /dev/sg11
[1:0:0:11] disk DELL MD32xx 0784 /dev/sdm /dev/sg12
[1:0:0:31] disk DELL Universal Xport 0784 - /dev/sg13
[1:0:1:0] disk DELL MD32xx 0784 /dev/sdn /dev/sg14
[1:0:1:1] disk DELL MD32xx 0784 /dev/sdo /dev/sg15
[1:0:1:2] disk DELL MD32xx 0784 /dev/sdp /dev/sg16
[1:0:1:3] disk DELL MD32xx 0784 /dev/sdq /dev/sg17
[1:0:1:4] disk DELL MD32xx 0784 /dev/sdr /dev/sg18
[1:0:1:5] disk DELL MD32xx 0784 /dev/sds /dev/sg19
[1:0:1:6] disk DELL MD32xx 0784 /dev/sdt /dev/sg20
[1:0:1:7] disk DELL MD32xx 0784 /dev/sdu /dev/sg21
[1:0:1:8] disk DELL MD32xx 0784 /dev/sdv /dev/sg22
[1:0:1:9] disk DELL MD32xx 0784 /dev/sdw /dev/sg23
[1:0:1:10] disk DELL MD32xx 0784 /dev/sdx /dev/sg24
[1:0:1:11] disk DELL MD32xx 0784 /dev/sdy /dev/sg25
[1:0:1:31] disk DELL Universal Xport 0784 - /dev/sg26
[6:0:0:0] cd/dvd HL-DT-ST DVD-ROM DU90N D300 /dev/sr0 /dev/sg27