ASMCA cannot find candidate disks

hi gurus
I installed 11gR2 clusterware software on Redhat Linux 4.7 I cannot see any disks in the "Create Disk Group" window when I run ASMCA. I changed the "disk discovery path' to '/dev/raw/* from default,but still nothing was find.
*[root@maoxl etc]# ls -l /dev/raw*
*total 0*
*crw-rw---- 1 oracle oinstall 162, 1 May 16 12:29 raw1*
*crw-rw---- 1 oracle oinstall 162, 2 May 16 12:29 raw2*
I have checked the read write permission on the disks(raw1,raw2 here),it's ok,why ASMCA cannot find them?
Thanks very much!
Edited by: KevinMao on May 16, 2011 12:30 AM

RTFM:
http://download.oracle.com/docs/cd/E11882_01/install.112/e17212/storage.htm
If you read this you closely, you will find:
a.) Using /dev/raw is not needed anymore, you can directly use the block devices (e.g. /dev/sd*).
b.) Your user right should be grid:asmadmin (or at leas oracle:asmadmin) and not oracle:oinstall.
Regards
Sebastian

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