Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!think!ephraim
From: ephraim@think.COM (Ephraim Vishniac)
Newsgroups: comp.sys.mac
Subject: Re: Hard disk interleave
Message-ID: <38505@think.UUCP>
Date: 4 Apr 89 14:23:06 GMT
References: <25094@amdcad.AMD.COM>
Sender: news@think.UUCP
Reply-To: ephraim@vidar.think.com.UUCP (Ephraim Vishniac)
Distribution: usa
Organization: Thinking Machines Corporation, Cambridge MA, USA
Lines: 21

In article <25094@amdcad.AMD.COM> ching@pepsi.amd.com (Mike Ching) writes:
>I am moving a Quantum 280 from a Mac+ to a Mac II and would like to
>know if it needs to be reformatted to change the interleave.

Absolutely not.  The Q280 does not have changeable interleaving.
Instead, it has a large enough internal cache that the actual
interleaving makes no difference to the host system.

>I think I read somewhere that drives are formatted with a 3:1
>interleave for a Mac+, a 2:1 interleave for a Mac SE and a 1:1
>interleave for a Mac II. Is this correct?

You probably did read that.  It's a gross generalization.  That is,
it's correct for some particular types of disks with some particular
software, but it's not generally true.

Ephraim Vishniac  /  Internet: ephraim@think.com  / AppleLink: ThinkingCorp
Thinking Machines Corporation / 245 First Street / Cambridge, MA 02142-1214

	"Arlo Guthrie, it seems, has found what he was looking for:
		God, and the Macintosh." (Boston Globe)