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Path: utzoo!watmath!watcgl!dmmartindale
From: dmmartindale@watcgl.UUCP (Dave Martindale)
Newsgroups: net.unix
Subject: Re: Disk partition sizes on big disks.
Message-ID: <1124@watcgl.UUCP>
Date: Mon, 28-Nov-83 23:27:52 EST
Article-I.D.: watcgl.1124
Posted: Mon Nov 28 23:27:52 1983
Date-Received: Tue, 29-Nov-83 04:52:06 EST
References: <985@utah-gr.UUCP>
Organization: U of Waterloo, Ontario
Lines: 8

4.1BSD restor (and V7, for that matter) is rather slow because of the
way it spends so much time copying data around.  But "dump" is much more
careful about this thing; it even sorts the data blocks which are to be
read for any particular tape block to speed things up.  Once you get a 6250
BPI drive, you will find that dump spends the vast majority of its time
reading disk, not writing tape.  Splitting a large filesystem into smaller
ones won't help this any.  4.2BSD's larger block sizes and more careful
disk layout should speed things up considerably though.