Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!lll-winken!sun-barr!texsun!texbell!merch!cpe!hal6000!trsvax!slimer
From: slimer@trsvax.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: 286 Accelerator and Disk Interleave
Message-ID: <216100145@trsvax>
Date: 16 Sep 89 17:29:00 GMT
References: <456@ryn.esg.dec.com>
Lines: 24
Nf-ID: #R:ryn.esg.dec.com:456:trsvax:216100145:000:1305
Nf-From: trsvax.UUCP!slimer    Sep 16 12:29:00 1989


  The interleave factor has a drastic affect on the performance of your
  hardware. With a factor of three, this means that every third sector will
  be the continuous sector. This is done for those slow machines that
  cannot keep up with the hard disk. When a sector is read, by the time the
  machine is ready for another sector, the one it was supposed to read has
  already spun past the heads and you have to wait for it to come around
  again.

  By speeding up your performance of the CPU, you can read data faster from
  the hard disk. With the interleave so high at three(2 being normal
  usually), now the CPU is waiting on the drive to come around to the right
  sector. Perhaps an interleave of two would suffice, but to re-interleave
  a drive properly, you should re-low-level-format the drive with the new
  interleave specs.

  Maybe your performance degradation is due to this phenomenon (sp). 


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