1.错误信息：Instantiating disk: failed

[root@linuxrac1 /]# /usr/sbin/oracleasm createdisk OCR_VOTE /dev/sdb1

/etc/init.d/oracleasm createdisk OCR_VOTE /dev/sdb1

Writing disk header: done

Instantiating disk: failed

Clearing disk header: done

2.解决办法：

1.首先检查Oracle ASMlib、oracleasm与 Linux内核版本是否一致，通常版本不一致，会导致此问题。

[root@linuxrac2 etc]# uname -r

2.6.18-164.el5

若不一致，请在Oracle ASMlib下载地址下载：

http://www.oracle.com/technetwork/server-storage/linux/downloads/rhel5-084877.html

2.可能selinux 阻止访问disk header

[root@linuxrac1 etc]# cd selinux

[root@linuxrac1 selinux]# ll

total 20

-rw-r--r--. 1 root root  458 Jul 22 09:27 config

-rw-r--r--. 1 root root  113 Feb 21  2013 restorecond.conf

-rw-r--r--. 1 root root   76 Feb 21  2013 restorecond_user.conf

-rw-r--r--. 1 root root 2271 Feb 21  2013 semanage.conf

drwxr-xr-x. 6 root root 4096 Jul 22 09:33 targeted

[root@linuxrac1 selinux]# cp -a /etc/selinux/config  /etc/selinux/config_bak

[root@linuxrac1 selinux]# vi config

# This file controls the state of SELinux on the system.

# SELINUX= can take one of these three values:

#     enforcing - SELinux security policy is enforced.

#     permissive - SELinux prints warnings instead of enforcing.

#     disabled - No SELinux policy is loaded.

#SELINUX=enforcing

SELINUX=disabled

# SELINUXTYPE= can take one of these two values:

#     targeted - Targeted processes are protected,

#     mls - Multi Level Security protection.

SELINUXTYPE=targeted

[root@linuxrac1 etc]# reboot