[Ocfs2-users] OCFS2 Multipath Configuration

[David Johle]

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