Thanks to all that replied and this is for those that asked me to post a
summary.
The wisdom of the net is that one does not need to reformat. But you
need to do a dump, newfs and restore. This will take of the io
clustering (new as of 4.1.1) and also the clean/dirty flag.
The first to reply was Mark Wiederspahn (markw@utig.ig.utexas.edu).
Thanks also to:
poffen@sj.ate.slb.com (Russ Poffenberger)
sid@ingres.com
wallen@cogsci.UCSD.EDU (Mark R. Wallen)
Jeff Bacon <bacon@mtu.edu>
fabrice@yosemite.atmos.ucla.edu (fabrice cuq)
<sun@cs.st-andrews.ac.uk>
peter@key.amdahl.com (Peter Sivo)
Gustavo Vegas <gustavo@davinci.concordia.ca>
mdl@cypress.com (J. Matt Landrum)
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