oracleasm - Prepare the Partitions for ASM via ASMLIB

rpm -ivh oracleasm* to install 3 ASMLIB RPM packages

In the first node of the cluster:
/etc/init.d/oracleasm configure to configure the driver
/etc/init.d/oracleasm createdisk ORADATA_DISK01 /dev/emcpowera1 to mark the disk as ASM disk
/etc/init.d/oracleasm querydisk  /dev/emcpowera1 to show the mapping between ASM disks and the device


From the remaining nodes:
/etc/init.d/oracleasm scandisks to detect the configured disks
/etc/sysconfig/oracleasm is modified to match and exclude the disk naming partterns

# ORACLEASM_SCANORDER: Matching patterns to order disk scanning
ORACLEASM_SCANORDER="emcpower"
# ORACLEASM_SCANEXCLUDE: Matching patterns to exclude disks from scan
ORACLEASM_SCANEXCLUDE="sd"