so post the corresponding error message in logfile
/etc/init.d/oracleasm createdisk DATA1 /dev/sdb1 Marking disk "DATA1" as an ASM disk: [FAILED]
post appropriate error message related to above createdisks statement.
Ask you System Administrator to make sure the device is mounted and partitioned correctly.
Unable to open device "/dev/sdb1": Device or resource busy
after creation of disk use
/usr/sbin/asmtool -C -l /dev/oracleasm -n DISK1 -s /dev/sdb1 -a force=yes
to make sure it created.