4.1bsd maximum raw read question

[Steven M. Kramer]

In 4.1bsd, the raw I/O is done thru physio().  The last parameter is
a routine to determine the maximum count to be transferred.  The
routine used is mostly minphys(), which limits it to 60K.  So this
means that raw I/O is done thru 60K bytes at most, right?  Can this
value be changed without any side affects?  We want this for an
application that does fast disk-disk backups (on RM05s).
-- 
--steve kramer
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