Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!decwrl!decvax!ucbvax!CORY.BERKELEY.EDU!dillon
From: dillon@CORY.BERKELEY.EDU (Matt Dillon)
Newsgroups: comp.sys.amiga
Subject: Re: AmigaDos don't thrash no more!
Message-ID: <8802191751.AA24170@cory.Berkeley.EDU>
Date: 19 Feb 88 17:51:51 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Lines: 17


	Using the 'reading from two files simultaniously' example...

	AmigaDOS, from what I can tell, not only requests blocks one
at a time, but also queues only one request per file handle at a time.
So no matter which track seeking scheme you use, the trackdisk will
always be getting just two requests simultaniously for two widely
separated tracks, and no further requests until it has completed at 
least one of the two (at which point is begins processing the second
one before the next request after the completed first one is issued).

	Now let me see if I can turn that into a tongue twister.

The trackdisk's track seeks to seek to Ami's request but Ami's request
seeks to seek the trackdisk's track just one block per track per handle.

					-Matt