mount as ro for users, rw for root?

[J. Epperson]

On Sun, December 14, 2008 00:11, Matt Domsch wrote:
>
> multiply mounting a NFS export is OK.  Multiply mounting an iSCSI
> volume (a LUN, seen as a disk to Linux) is really bad, unless you're
> using a cluster-aware file system on it, such as GFS.
>

For my own education, is that the case when one mount is read only, as was
suggested?  I guess the ro mount would still be updating atime, so I'm
thinking that it would be, but if not it could be a useful technique.