Path: utzoo!attcan!uunet!husc6!uwvax!umn-d-ub!umn-cs!nic.MR.NET!shamash!nis!meccts!meccsd!mvs
From: mvs@meccsd.MECC.MN.ORG (Michael V. Stein)
Newsgroups: comp.sys.apple
Subject: Re: 800K disk formatting
Message-ID: <1026@meccsd.MECC.MN.ORG>
Date: 1 Oct 88 03:37:23 GMT
References: <8809291720.aa01487@SMOKE.BRL.MIL>
Reply-To: mvs@meccsd.UUCP (Michael V. Stein)
Organization: Minn. Educ. Comp. Corp.
Lines: 22

In article <8809291720.aa01487@SMOKE.BRL.MIL> LWELCH@COLGATEU.BITNET writes:
>Assuming I'm using GS/OS for everything, but I launch into ProDOS 8 applications
>as well as ProDOS 16 ones, which disks should I initialize as 4:1 and which as
>2:1?  How did the old ProDOS 16 initialize disks?

ProDOS 16 formatted disks with an interleave of 4, although I think it could
have worked with an interleave of 3.

>I would guess that disks to be used by ProDOS 8 applications should be done
>as 4:1 and ProDOS 16 disks should be inited as 2:1 (with GS/OS)  Is this
>correct?

You might want to always use an interleave of 2 with ProDOS 8.  Saving
data to the disk will be slower, but loading will be faster.  (Most
uses of the machine will require much more "loading" of data than "saving.")  
If you happen to be using ProDOS 16, use an interleave of 4.  

If you are using the uni-disk, always use an interleave of 4.

-- 
Michael V. Stein - Minnesota Educational Computing Corp. - Technical Services
{bungia,uiucdcs,umn-cs}!meccts!mvs  or  mvs@mecc.MN.ORG