Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!cs.utexas.edu!ut-emx!ccwf.cc.utexas.edu
From: andy@ccwf.cc.utexas.edu (Andrew Hackard)
Newsgroups: comp.sys.cbm
Subject: Re: 1571 writes slowly on side 2
Summary: BAM problems
Keywords: bam 1571 disk side two write slow
Message-ID: <46392@ut-emx.uucp>
Date: 29 Mar 91 17:50:22 GMT
References: <1991Mar28.024743.16062@gn.ecn.purdue.edu>
Sender: news@ut-emx.uucp
Reply-To: andy@ccwf.cc.utexas.edu (Andrew Hackard)
Organization: The University of Texas at Austin, Grackle Assault Team
Lines: 7

If I remember correctly, the problem is that many of the tracks on side 2 are
allocated by the BAM on side 1; when the 1571 writes a sector on side 2, it has
to go back to side 1 to mark the block as used.  I don't know why that would
make things so much slower, and I may be misremembering, so someone who is a bit
more familiar with the hardware probably can give you a more detailed answer.

--Andrew