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From: clark.wbst@PARC-MAXC.ARPA
Newsgroups: net.unix
Subject: Re: Raw vs. block device.  I'm confused.
Message-ID: <15353@sri-arpa.UUCP>
Date: Mon, 9-Jan-84 08:10:00 EST
Article-I.D.: sri-arpa.15353
Posted: Mon Jan  9 08:10:00 1984
Date-Received: Sun, 15-Jan-84 01:23:41 EST
Lines: 5

A raw device does not go through the buffer pool... this has some side effects
like you have to read and write in integer multiples of physical blocks 
(sectors), starting on block boundries.

--Ray