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From: smk@linus.UUCP (Steven M. Kramer)
Newsgroups: net.unix-wizards
Subject: 4.1bsd maximum raw read question
Message-ID: <26928@linus.UUCP>
Date: Sat, 25-Jun-83 11:06:56 EDT
Article-I.D.: linus.26928
Posted: Sat Jun 25 11:06:56 1983
Date-Received: Sat, 25-Jun-83 19:46:49 EDT
Organization: MITRE Corp., Bedford MA
Lines: 10

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
	{allegra,genrad,ihnp4,utzoo,philabs,uw-beaver}!linus!smk	(UUCP)
	linus!smk@mitre-bedford						(ARPA)