Here is a quick and simple way to map your ASM disks to their physical disks. The examples are from Linux.
SQL>
select path from v$asm_disk;
PATH
----------------------------------------------
/dev/oracleasm/disks/VOL3
/dev/oracleasm/disks/VOL7
/dev/oracleasm/disks/VOL4
/dev/oracleasm/disks/VOL8
/dev/oracleasm/disks/VOL5
/dev/oracleasm/disks/VOL9
/dev/oracleasm/disks/VOL10
/dev/oracleasm/disks/VOL11
/dev/oracleasm/disks/VOL12
/dev/oracleasm/disks/VOL6
/dev/oracleasm/disks/VOL13
/dev/oracleasm/disks/VOL14
/dev/oracleasm/disks/VOL1
/dev/oracleasm/disks/VOL2
14
rows selected.
(I
used the following to get the Major and Minor numbers to id the disks):
$>:/home/oracle>
cd /dev/oracleasm/disks
$>:/dev/oracleasm/disks>
ls -ltarF
total
0
drwxr-xr-x
4 root root 0 Sep 23 22:30 ../
drwxr-xr-x
1 root root 0 Sep 23 22:30 ./
brw-rw----
1 oracle dba 253, 30
Mar 5 13:54 VOL8
brw-rw----
1 oracle dba 253, 32
Mar 5 13:54 VOL7
brw-rw----
1 oracle dba 253, 31
Mar 5 13:54 VOL4
brw-rw----
1 oracle dba 253, 33
Mar 5 13:54 VOL3
brw-rw----
1 oracle dba 253, 19
Mar 5 13:54 VOL2
brw-rw----
1 oracle dba 253, 22
Mar 5 13:54 VOL14
brw-rw----
1 oracle dba 253, 23
Mar 5 13:54 VOL13
brw-rw----
1 oracle dba 253, 27
Mar 5 13:54 VOL10
brw-rw----
1 oracle dba 253, 20
Mar 5 13:54 VOL1
brw-rw----
1 oracle dba 253, 28
Mar 5 13:54 VOL9
brw-rw----
1 oracle dba 253, 24
Mar 5 13:54 VOL6
brw-rw----
1 oracle dba 253, 29
Mar 5 13:54 VOL5
brw-rw----
1 oracle dba 253, 25
Mar 5 13:54 VOL12
brw-rw----
1 oracle dba 253, 26
Mar 5 13:54 VOL11
$>:/home/oracle>
ls -l /dev
brw-rw----
1 root root 253, 0 Sep 23 22:29 dm-0
brw-rw----
1 root root 253, 1 Sep 23 22:29 dm-1
brw-rw----
1 root root 253, 10 Sep 23 22:29 dm-10
brw-rw----
1 root root 253, 11 Sep 23 22:29 dm-11
brw-rw----
1 root root 253, 12 Sep 23 22:29 dm-12
brw-rw----
1 root root 253, 13 Sep 23 22:29 dm-13
brw-rw----
1 root root 253, 14 Sep 23 22:29 dm-14
brw-rw----
1 root root 253, 15 Sep 23 22:29 dm-15
brw-rw----
1 root root 253, 16 Sep 23 22:29 dm-16
brw-rw----
1 root root 253, 17 Sep 23 22:29 dm-17
brw-rw----
1 root root 253, 18 Sep 23 22:29 dm-18
brw-rw---- 1 root root
253, 19 Sep 23 22:29 dm-19
brw-rw----
1 root root 253, 2 Sep 23 22:29 dm-2
brw-rw---- 1 root root
253, 20 Sep 23 22:29 dm-20
brw-rw----
1 root root 253, 21 Sep 23 22:29 dm-21
brw-rw---- 1 root root
253, 22 Sep 23 22:29 dm-22
brw-rw---- 1 root root
253, 23 Sep 23 22:29 dm-23
brw-rw---- 1 root root
253, 24 Sep 23 22:29 dm-24
brw-rw---- 1 root root
253, 25 Sep 23 22:29 dm-25
brw-rw---- 1 root root
253, 26 Sep 23 22:29 dm-26
brw-rw---- 1 root root
253, 27 Sep 23 22:29 dm-27
brw-rw---- 1 root root
253, 28 Sep 23 22:29 dm-28
brw-rw---- 1 root root
253, 29 Sep 23 22:29 dm-29
brw-rw----
1 root root 253, 3 Sep 23 22:29 dm-3
brw-rw---- 1 root root
253, 30 Sep 23 22:29 dm-30
brw-rw---- 1 root root
253, 31 Sep 23 22:29 dm-31
brw-rw---- 1 root root
253, 32 Sep 23 22:29 dm-32
brw-rw---- 1 root root
253, 33 Sep 23 22:29 dm-33
brw-rw----
1 root root 253, 4 Sep 23 22:29 dm-4
brw-rw----
1 root root 253, 5 Sep 23 22:29 dm-5
brw-rw----
1 root root 253, 6 Sep 23 22:29 dm-6
brw-rw----
1 root root 253, 7 Sep 23 22:29 dm-7
brw-rw----
1 root root 253, 8 Sep 23 22:29 dm-8
brw-rw----
1 root root 253, 9 Sep 23 22:29 dm-9
Thx
