Some Note about Configuring SAN Disks

1) To check HBA driver version and supported

cat /etc/modprobe.conf
alias scsi_hostadapter1 lpfc
alias scsi_hostadapter2 lpfc
modinfo lpfc | more
filename:       /lib/modules/2.6.18-194.el5/kernel/drivers/scsi/lpfc/lpfc.ko
version:        0:8.2.0.63.3p
author:         Emulex Corporation - tech.support@emulex.com
description:    Emulex LightPulse Fibre Channel SCSI driver 8.2.0.63.3p
license:        GPL
srcversion:     CABE989E4BB61146A4D4D5D

2) Check LUNs -cat /proc/scsi/scsi | more

3) Partitioning Disks: Should be run on one node only when actually partiioning the disks.  Then on the other nodes, you can run partprobe to update the partition table or you can reboot the servers to update the partition table changes.

If you prepare the partitions for ASM with udev, you can define rules and in the configuration file /etc/udev/udev.conf../etc/udev/rules.d
-rw-r--r-- 1 root root   255 Jun 15  2010 89-raw_permissions.rules
-rw-r--r-- 1 root root   600 Jun 15  2010 60-raw.rules
[root@lltcind01 rules.d]# more 89-raw_permissions.rules
#OCR
KERNEL=="raw1",OWNER="root", GROUP="oinstall", MODE="640"
#Votingdisk
KERNEL=="raw2",OWNER="oracle", GROUP="oinstall", MODE="640"
KERNEL=="raw3",OWNER="oracle", GROUP="oinstall", MODE="640"
KERNEL=="raw4",OWNER="oracle", GROUP="oinstall", MODE="640"
[root@lltcind01 rules.d]# more 60-raw.rules
# Enter raw device bindings here.
#
# An example would be:
#   ACTION=="add", KERNEL=="sda", RUN+="/bin/raw /dev/raw/raw1 %N"
# to bind /dev/raw/raw1 to /dev/sda, or
#   ACTION=="add", ENV{MAJOR}=="8", ENV{MINOR}=="1", RUN+="/bin/raw /dev/raw/raw2 %M %m"
# to bind /dev/raw/raw2 to the device with major 8, minor 1.
ACTION=="add", KERNEL=="emcpoweras1", RUN+="/bin/raw /dev/raw/raw1 %N"
ACTION=="add", KERNEL=="emcpowerat1", RUN+="/bin/raw /dev/raw/raw2 %N"
Then you can reoload the udev rules and restart udev via "udevcontrol reload_rules, start_dev