To Configure RAC 11gR2 on AIX 6.1 using ASM. You need to prepare the raw devices like below. The general location for raw devices on AIX is /dev. The disk names are like /dev/rhdisk*
# lsattr -E -l hdisk3 | grep reserve_ reserve_policy no_reserve #chdev -l hdisk3 -a [ reserve_lock=no | reserve_policy=no_reserve ]
reserve_policy is for AIX storage, rreserve_lock is for EMC and other storage.
You need to change the
reserve option on every storage device you will be using in ASM
prmdb[/dev] # /usr/sbin/chdev -l hdisk3 -a pv=clear hdisk3 changed prmdb[/dev] # /usr/sbin/chdev -l hdisk2 -a pv=clear hdisk2 changed prmdb[/dev] # /usr/sbin/chdev -l hdisk4 -a pv=clear hdisk4 changed
prmdb[/dev] # chmod 660 rhdisk4 prmdb[/dev] # chmod 660 rhdisk3 prmdb[/dev] # chmod 660 rhdisk2
prmdb[/dev] # chown grid:asmadmin rhdisk2 prmdb[/dev] # chown grid:asmadmin rhdisk4 prmdb[/dev] # chown grid:asmadmin rhdisk3
If you get error that you cannnot create the disk group then clear the raw devices using below command( this generally happens when you had previously configured an ASM instance to use these raw devices and it was a failed installation and you are installing again)
chdev -l hdisk4 -a pv=yes chdev -l hdisk3 -a pv=yes chdev -l hdisk2 -a pv=yes
