Please verify if the permission for multipath.conf is set as below
-rw-r--r--. 1 root root 3084 Aug 5 13:24 /etc/multipath.conf
If not then correct the permissions as above and then retry the installation
Ref: How to Manually Configure Disk Storage devices for use with Oracle ASM 11.2 and 12.1 on IBM: Linux on System z under RedHat 6 (Doc ID 1377392.1)
Vandana - Oracle
Are you using patchset 18.104.22.168 ? As this bug is fixed in Patchset 22.214.171.124.
Refer MOS :: 1210863.1 for details.
Are you using correct user and group (and permissions) for disks (directory and files that you created)?
Usually owner for Grid Infra is not oracle.
Check this (step 9):
error is cause by typographical mistakes.
dd if=/dev/zero of=/data/u01/oradata/asm_dsk1
asm_dskX does not match asm_diskX in
PRVF-5150 : Path /data/u01/oradata/asm_disk1