[Ocfs2-users] Mounting mpath devices in RHEL 5

[Kevin Masaryk]

I'm seeing some strange behavior from OCFS2 while trying to mount
mpath/dm-multipath devices under RHEL5. Sometimes I can mount the
EMC-connected, dual-pathed volumes just fine and sometimes I get "device
busy" errors. I've tried mounting by label and also by explicit
/dev/mapper/mpathXpY name with the same unpredictable behavior. I've
also noticed that sometimes when a device is successfully mounted on all
nodes, each node may return different output from the mount command
regarding the device mounted; e.g. /dev/mapper/mpath0p1 vs. /dev/dm-17.

One consistent aspect I have noticed whenever I receive the "device
busy" error is that the /dev/dm-X names don't match up on each node. I
also see that ocfs2console refers to each device by the /dev/dm-X name
instead of the /dev/mapper/XX name.

I guess my question is simply: Are dm-multipath devices supported under
OCFS2? Are multipathed devices not recommended with OCFS2? Any
documentation available on this?
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