现象一：
mount -t ocfs2 -o datavolume,nointr /dev/sdb1 /webdata
mount.ocfs2: Transport endpoint is not connected while mounting /dev/sdb1 on /webdata. Check 'dmesg' for more information on this error.

可能问题：
1：防火墙打开着，没有关闭，屏蔽了心跳端口
2：各个节点的/etc/init.d/o2cb configure值配置不同导致。
3：一个节点处于挂载中，另外一个节点刚刚配置好，重启了ocfs2服务导致，此时只要把连个节点都重启一下服务即可完成挂载。

4：SElinux没有关闭导致。

下面是一个案例：

[root@test02 ~]# mount -t ocfs2 /dev/vg_ocfs/lv_u02 /u02
mount.ocfs2: Transport endpoint is not connected while mounting /dev/vg_ocfs/lv_u02 on /u02. Check 'dmesg' for more information on this error.
出现这个错误是由于配置OCFS时O2CB_HEARTBEAT_THRESHOLD各节点的值不一样导致的。我用/etc/init.d/o2cb configure时其实各个节点的值已经都一样了，不过第一个节点忘了重启o2cb，结果查了好久才发现。接下当然是把已经MOUNT的OCFS目录UMOUNT掉，结果又出错了：
[root@test01 u02]# umount -f /u02
umount2: Device or resource busy
umount: /u02: device is busy
umount2: Device or resource busy
umount: /u02: device is busy
这时候应该用/etc/init.d/ocfs2 stop和/etc/init.d/o2cb stop停掉OCFS2和O2CB再UMOUJNT才行，然后把OCFS2和O2CB启动以后其他节点就可以顺利MOUNT OCFS了。

现象二：
# /etc/init.d/o2cb online ocfs2

Starting cluster ocfs2: Failed

Cluster ocfs2 created

o2cb_ctl: Configuration error discovered while populating cluster ocfs2. None of its nodes were considered local. A node is considered local when its node name in the configuration maches this machine's host name.

Stopping cluster ocfs2: OK

主机名问题，检查more /etc/ocfs2/cluster.conf以及/etc/hosts文件信息，修改相应的主机名即可

注意：为了保证开机能自动挂载ocfs2文件系统，需要在/etc/fstab加入自动启动选项后，必须在/etc/hosts中加入两个节点的主机名和ip的对应解析，主机名和 /etc/ocfs2/cluster.conf配置的主机名一定要相同。

现象三

1: Starting O2CB cluster ocfs2: Failed
在安装完ocfs2 后,配置o2cb 出错:
[root@rac1 ocfs2]# /etc/init.d/o2cb configure
Configuring the O2CB driver.

This will configure the on-boot properties of the O2CB driver.
The following questions will determine whether the driver is loaded on
boot. The current values will be shown in brackets ('[]'). Hitting
<ENTER> without typing an answer will keep that current value. Ctrl-C
will abort.

Load O2CB driver on boot (y/n) [y]:
Cluster to start on boot (Enter "none" to clear) [ocfs2]:
Specify heartbeat dead threshold (>=7) [7]:
Writing O2CB configuration: OK
Starting O2CB cluster ocfs2: Failed
Cluster ocfs2 created
     o2cb_ctl: Configuration error discovered while populating cluster ocfs2. None of its nodes were considered local. A node is considered local when its node name in the configuration matches this machine's host name.
Stopping O2CB cluster ocfs2: OK
出现这中情况,应该是OCFS没有配置，可以看一下，有一个图形ocfs配置命令，首先要配置他，而且最好 用IP地址，不要用主机名！
也就是说,在启动ocfs2时,ocfs节点配置文件一定要配置好,如果没有配置正确,就会报错,同时在用图形界面配置的时候,/etc/ocfs2/cluster.conf文件最好是空文件,要不然也会报错!

现象四
挂载ocfs2文件系统遇到
mount.ocfs2: Error when attempting to run /sbin/ocfs2_hb_ctl: "Operation not permitted"
mount -t ocfs2 -o datavolume /dev/sdb1 /u02/oradata/orcl
ocfs2_hb_ctl: Bad magic number in superblock while reading uuid
mount.ocfs2: Error when attempting to run /sbin/ocfs2_hb_ctl: "Operation not permitted"
这个问题是由于ocfs2文件文件系统分区没有格式化引起的错误,在挂载ocfs2文件系统之前,用于这个文件系统的分区一定要进行格式化.

现象五：
Configuration assistant "Oracle Cluster Verification Utility" failed
10g rac 安装请教　oracle 10.2.0.1 solaris 5.9 双机　安装ｃｒｓ最后一步有错，不知如何解决？

LOG 信息：
INFO: Configuration assistant "Oracle Cluster Verification Utility" failed
-----------------------------------------------------------------------------
*** Starting OUICA ***
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