执行root.sh时报错：未能创建磁盘CRS

在三台RHEL5.4上装grid，节点2、3成功安装，但在节点1上执行root.sh时报错：未能创建磁盘CRS，返回：
ORA-15018:diskgroup cannot be created
ORA-15072:command requires at least 1 regular failure groups,discoveried only 0

下面是rootcrs_rac1.log日志：
2010-05-24 09:30:54: Configuring ASM via ASMCA
2010-05-24 09:30:54: Executing as grid: /u01/app/11.2.0/grid/bin/asmca -silent -diskGroupName CRS -diskList ORCL:CRSVOL1 -redundancy EXTERNAL -configureLocalASM
2010-05-24 09:30:54: Running as user grid: /u01/app/11.2.0/grid/bin/asmca -silent -diskGroupName CRS -diskList ORCL:CRSVOL1 -redundancy EXTERNAL -configureLocalASM
2010-05-24 09:30:54: Invoking "/u01/app/11.2.0/grid/bin/asmca -silent -diskGroupName CRS -diskList ORCL:CRSVOL1 -redundancy EXTERNAL -configureLocalASM" as user "grid"
2010-05-24 09:31:08: Configuration of ASM failed, see logs for details
2010-05-24 09:31:08: Did not succssfully configure and start ASM
2010-05-24 09:31:08: Exiting exclusive mode
2010-05-24 09:31:08: Command return code of 1 (256) from command: /u01/app/11.2.0/grid/bin/crsctl stop resource ora.crsd -init
2010-05-24 09:31:08: Stop of resource "ora.crsd -init" failed
2010-05-24 09:31:08: Failed to stop CRSD
2010-05-24 09:31:36: Initial cluster configuration failed.

from metalink note: 1059847.1

On all nodes,

1. Modify the /etc/sysconfig/oracleasm with:

ORACLEASM_SCANORDER="dm"
ORACLEASM_SCANEXCLUDE="sd"

2. restart the asmlib by :

# /etc/init.d/oracleasm restart

3. Run root.sh on the 2nd node

楼主这么长时间没有回复，我以为这个方法不行，今天我试一下，终于让集群安装上，这个问题害得我昨天全部将系统安装了一遍。在第一个节点上执行成功，但第二个结果上就是不行。
以前也看到了关于ORACLE ASM在multipath多路径下的问题，但发现oracleasm工具可以很好的识别，就没有在意，直到看这个，我才明白，这其中有可能有更深层次的问题。

我当时通过oracleasm querydisk /dev/dm-0是可以查看到ASM的盘，就以为ASM没有问题，看来高看了ASM的智能性。

感谢：liuyi8903