multiple machines mounting same partition via SAN

[David Sparks <daves@xxxxxxxxxxxxxxx>]

I'm testing a new SAN here ... I connected 2 machines and both mounted 
the same partition in R/W mode.  I was expecting something like this to 
happen:

xfs_force_shutdown(sdb1,0x1) called from line 353 of file 
fs/xfs/xfs_rw.c.  Return address = 0xffffffff80202e0b
Filesystem "sdb1": I/O Error Detected.  Shutting down filesystem: sdb1
Please umount the filesystem, and rectify the problem(s)
xfs_force_shutdown(sdb1,0x1) called from line 353 of file 
fs/xfs/xfs_rw.c.  Return address = 0xffffffff80202e0b

Ok, good.

What I'm actually interested in is having one machine mount the 
partition in RW and another in RO mode.  Is this a sane configuration?

Thanks,

ds