Block device permissions on 11g Clusterware

According to 11gR1 clusterware installation guide, the way to preserve the permissions of block devices used for OCR and Vote disk is to add file to /etc/udev/permissions.d directory

But this does not work for RHEL 5 as there's no permission.d folder. On RHEL5 have to create a file in /etc/udev/rules.d/99-raw.rules or /etc/udev/rules.d/99-sdb.rules (if the block device used for ocr and vote disk is a partion of sdb) with the following content

KERNEL=="raw[1-2]*", GROUP="oinstall", MODE="640"
KERNEL=="raw[3-5]*", OWNER="oracle", GROUP="oinstall", MODE="660"

Or

#OCR
KERNEL=="sdb[1]*", GROUP="oinstall", MODE="640"
#VOTE and ASM spfile
KERNEL=="sdb[2-3]*", OWNER="oracle", GROUP="oinstall", MODE="660"
#ASM
KERNEL=="sdb[5-6]*", OWNER="oracle", GROUP="dba", MODE="660"

Read more from here

Useful metalink note
How to Setup UDEV Rules for RAC OCR & Voting devices on SLES10, RHEL5, OEL5 [ID 414897.1]
Configuring raw devices (singlepath) for Oracle Clusterware 10g Release 2 (10.2.0) on RHEL5/OEL5 [ID 465001.1]
Configuring raw devices (multipath) for Oracle Clusterware 10g Release 2 (10.2.0) on RHEL5/OEL5 [ID 564580.1]