ASMlib raw device mapping

Question

We're using ASMlib here, and I'm trying to figure out which raw devices were mapped to which ASM disks. From the installation instructions, our disks must have been created using the "/etc/init.d/oracleasm createdisk VOL1 /dev/sdg1
" command mentioned on Oracle's main site. However the commands to query disks don't seem to provide that link.
For instance the following command:
/etc/init.d/oracleasm querydisk /dev/sdg1
Will tell you if that device is indeed and ASM disk, but it won't tell you which label it maps to. Similarly
/etc/init.d/oracleasm querydisk VOL1
will tell you that the disk with that label is an ASM disk, but won't tell you which raw device it maps to. The reason I'm asking about this is myself and the sysadmins are trying to map our ASM disks back to the raw devices and from there back to the luns. This obviously wasn't documented at the time the disks were created, long before I started working at my current company. We can go from databases to disk groups and from disk groups to ASM devices, but we can't get from ASM device labels to the raw device names which would allow us to go backwards to the luns.
Thanks!

Answer 1

me too...
#/etc/init.d/oracleasm querydisk /dev/sdc5
Disk "/dev/sdc5" is marked an ASM disk with the label "VOL1"
I still find device name from major and minor:
#/etc/init.d/oracleasm querydisk VOL1
Disk "VOL1" is a valid ASM disk on device \[8, 37\]
#ls -l /dev/* | grep 8, | grep 37
brw-rw---- 1 root disk 8, 37 Jul 31 17:48 /dev/sdc5
Script:
#!/bin/sh
if \[ $# -ne 1 \]
then
echo "Please Check arguments."
echo
echo "./getasmlib \[label\]"
echo
echo " ./getasmlib VOL01"
exit 0
fi
LABEL=$1
C=`/etc/init.d/oracleasm querydisk ${LABEL} |grep valid |wc -l`
if \[ ${C} -eq 0 \]
then
echo "Don't Found ${LABEL} Disk in ASMLIB"
exit 0
fi
M=`/etc/init.d/oracleasm querydisk ${LABEL} | awk -F [ '{print $2 }' | awk '{print $1}'`
N=`/etc/init.d/oracleasm querydisk ${LABEL} | awk -F , '{print $2 }' | awk -F ] '{print $1}'`
for x in ` ls -l /dev/* | grep ${M} | grep ${N} | awk '{print $10}' `
do
/etc/init.d/oracleasm querydisk $x |grep ${LABEL}
done
# ./getasmlib VOL1
Disk "/dev/sdc5" is marked an ASM disk with the label "VOL1"
Good Luck