Path: utzoo!attcan!uunet!husc6!mailrus!um-math!hyc
From: hyc@math.lsa.umich.edu (Howard Chu)
Newsgroups: comp.sys.atari.st
Subject: Re: Hard Disk limitations
Message-ID: <463@stag.math.lsa.umich.edu>
Date: 11 Nov 88 06:55:59 GMT
References: <881104030315.414923@PCO-MULTICS.HBI.HONEYWELL.COM> <3482@jpl-devvax.JPL.NASA.GOV>
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In article <3482@jpl-devvax.JPL.NASA.GOV> grieggs@jpl-devvax.JPL.NASA.GOV (John T. Grieggs) writes:
>In article <881104030315.414923@PCO-MULTICS.HBI.HONEYWELL.COM> Friesen%PCO@BCO-MULTICS.HBI.HONEYWELL.COM writes:
>>Someone recently mentioned a 300MB hard disk was available for the ST,
>>but I was told that an ST could only access 195MB on a hard disk.
>
>16 Mb per partition * 12 partitions = 192 Mb
>
>If anyone knows a not-too-illegal way around this limit, I would like
>to hear about it.  I know of no way to effectively use a 300 Mb unit
>on an ST at this time.

Depends on your meaning when you say "effective use." I use Minix on my ST.
Minix has no partition size limits. As such, having 300MB of disk available
to me would be effective for me. If you restrict yourself to TOS, you have
a problem... 

If you're willing to sacrifice some storage efficiency, you might consider
using larger disk block sizes. You only have 21 bits for addressing disk
blocks, but if you double the size of a block from 512 bytes to 1K, you've
just doubled your maximum from 192M to 384M.
--
  /
 /_ , ,_.                      Howard Chu
/ /(_/(__                University of Michigan
    /           Computing Center          College of LS&A
   '              Unix Project          Information Systems