[Ocfs2-users] OCFS2 Multipath Configuration

[Sunil Mushran]

Yeah.. mounted is a bit dumb. In the next release, it will recognize
/dev/mapper devices. We still need to teach it to handle multipathing
fully.

David Johle wrote:
> I'm not sure about why mounted.ocfs2 is showing both the dm and the 
> sd devices for the same volume.  But this could all be very similar 
> to a problem I've experienced with OCFS2 & mount finding the right 
> device with multipathing.
>
> See the following thread for some more insight:
> http://oss.oracle.com/pipermail/ocfs2-users/2009-March/003391.html
>
>
>
> At 04:12 PM 3/15/2010, you wrote:
>   
>> Date: Wed, 16 Dec 2009 14:20:45 -0500
>> From: "Nyburg, Daryl" <Daryl.Nyburg at utoledo.edu>
>> Subject: [Ocfs2-users] OCFS2 Multipath Configuration
>> To: <ocfs2-users at oss.oracle.com>
>>
>> Hello All,
>>     I am having some problems configuring OCFS2 to use only the
>> multipath device name.  We have been doing failover testing with our
>> ISCI SAN and as soon as we unplug one NIC the following messages appear
>> in /var/log/messages and the system reboots.
>>
>>
>> Dec 16 12:39:03 mcprac01 kernel: (56,6):o2hb_write_timeout:172 ERROR:
>> Heartbeat write timeout to device dm-34 after 120000 milliseconds
>> Dec 16 12:39:03 mcprac01 kernel: (56,6):o2hb_stop_all_regions:1967
>> ERROR: stopping heartbeat on all active regions.
>> Dec 16 12:39:03 mcprac01 kernel: ocfs2 is very sorry to be fencing this
>> system by restarting
>>
>>
>> RHEL 5.3 Kernel 2.6.18-128.el5
>> OCFS2 Versions
>>   ocfs2console-1.4.3-1.el5
>>   ocfs2-2.6.18-128.el5-1.4.2-1.el5
>>   ocfs2-tools-1.4.3-1.el5
>>
>> Why does this show all device paths? Is there anyway to tell OCFS2 to
>> ignore the /dev/sd* devices ?
>> $ mounted.ocfs2 -d
>> Device                FS     UUID                                  Label
>> /dev/sdf1             ocfs2  2eaddbd4-fac6-4c83-a86d-357215730b23
>> /dev/dm-25          ocfs2  2eaddbd4-fac6-4c83-a86d-357215730b23
>> /dev/sdaj1           ocfs2  2eaddbd4-fac6-4c83-a86d-357215730b23
>> /dev/sdd1            ocfs2  199f76a6-280a-46c6-812e-50712170a823
>> /dev/dm-32          ocfs2  199f76a6-280a-46c6-812e-50712170a823
>> /dev/sdai1           ocfs2  199f76a6-280a-46c6-812e-50712170a823
>>     
>
> _______________________________________________
> Ocfs2-users mailing list
> Ocfs2-users at oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs2-users
>