This will be just short article with very simple trick, showing how to match the ASMLib devices with actual multipath devices.
I’m sure there is a simpler way… but I just love using AWK 🙂 If you know a simpler or more elegant solution – please post it in the comments section.
My solution looks like this:
[root@rac-2 ~]# ls -al /dev/oracleasm/disks/ | awk '/^brw/ {printf($NF": ") ; system("ls -al /dev/dm-* | egrep \"" $5"[ ]+"$6"\"")}' | awk '{printf($1" "); system("cat /sys/block/"substr($NF,6)"/dm/name")}' | awk '{printf($1); system("multipath -ll " $2)}'
DATA01:360002ac0000000000000002a0001a94f dm-5 3PARdata,VV
size=300G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:13 sde 8:64 active ready running
|- 2:0:0:13 sdac 65:192 active ready running
|- 1:0:1:13 sdq 65:0 active ready running
`- 2:0:1:13 sdao 66:128 active ready running
DATA02:360002ac0000000000000002b0001a94f dm-6 3PARdata,VV
size=300G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:14 sdf 8:80 active ready running
|- 2:0:0:14 sdad 65:208 active ready running
|- 1:0:1:14 sdr 65:16 active ready running
`- 2:0:1:14 sdap 66:144 active ready running
DATA03:360002ac0000000000000002c0001a94f dm-7 3PARdata,VV
size=300G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:15 sdg 8:96 active ready running
|- 2:0:0:15 sdae 65:224 active ready running
|- 1:0:1:15 sds 65:32 active ready running
`- 2:0:1:15 sdaq 66:160 active ready running
DATA04:360002ac0000000000000002d0001a94f dm-8 3PARdata,VV
size=300G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:16 sdh 8:112 active ready running
|- 2:0:0:16 sdaf 65:240 active ready running
|- 1:0:1:16 sdt 65:48 active ready running
`- 2:0:1:16 sdar 66:176 active ready running
GRID01:360002ac000000000000000190001a94f dm-2 3PARdata,VV
size=20G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:10 sdb 8:16 active ready running
|- 2:0:0:10 sdy 65:128 active ready running
|- 1:0:1:10 sdn 8:208 active ready running
`- 2:0:1:10 sdal 66:80 active ready running
INDEX01:360002ac0000000000000001f0001a94f dm-3 3PARdata,VV
size=200G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:11 sdc 8:32 active ready running
|- 2:0:0:11 sdaa 65:160 active ready running
|- 1:0:1:11 sdo 8:224 active ready running
`- 2:0:1:11 sdam 66:96 active ready running
INDEX02:360002ac000000000000000200001a94f dm-9 3PARdata,VV
size=200G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:17 sdi 8:128 active ready running
|- 2:0:0:17 sdag 66:0 active ready running
|- 1:0:1:17 sdu 65:64 active ready running
`- 2:0:1:17 sdas 66:192 active ready running
INDEX03:360002ac000000000000000210001a94f dm-10 3PARdata,VV
size=200G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:18 sdj 8:144 active ready running
|- 2:0:0:18 sdah 66:16 active ready running
|- 1:0:1:18 sdv 65:80 active ready running
`- 2:0:1:18 sdat 66:208 active ready running
INDEX04:360002ac000000000000000220001a94f dm-11 3PARdata,VV
size=200G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:19 sdk 8:160 active ready running
|- 2:0:0:19 sdai 66:32 active ready running
|- 1:0:1:19 sdw 65:96 active ready running
`- 2:0:1:19 sdau 66:224 active ready running
INDEX05:360002ac000000000000000230001a94f dm-12 3PARdata,VV
size=200G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:20 sdl 8:176 active ready running
|- 2:0:0:20 sdaj 66:48 active ready running
|- 1:0:1:20 sdx 65:112 active ready running
`- 2:0:1:20 sdav 66:240 active ready running
REDO01:360002ac000000000000000240001a94f dm-4 3PARdata,VV
size=20G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:12 sdd 8:48 active ready running
|- 2:0:0:12 sdab 65:176 active ready running
|- 1:0:1:12 sdp 8:240 active ready running
`- 2:0:1:12 sdan 66:112 active ready running
REDO02:360002ac000000000000000250001a94f dm-13 3PARdata,VV
size=20G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 1:0:0:21 sdm 8:192 active ready running
|- 2:0:0:21 sdak 66:64 active ready running
|- 1:0:1:21 sdz 65:144 active ready running
`- 2:0:1:21 sdaw 67:0 active ready running
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