*BSD News Article 52425


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From: jim@aisbbs.com (Jim Louvau)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: DNS, FTP & Mail - for ISP
Date: 10 Oct 1995 08:12:34 GMT
Organization: Alternatives Unlimited Inc.
Lines: 35
Message-ID: <45d9ti$q5j@insosf1.netins.net>
References: <44mmsd$1lda@news.gate.net> <44ro0o$r9l@tzlink.j51.com> <450eem$335@news.hal-pc.org> <450tf7$4n0@tzlink.j51.com> <454bpu$eev@uriah.heep.sax.de>
NNTP-Posting-Host: s3122.netins.net
X-Newsreader: NeoLogic News for OS/2 [version: 4.2]

In message <459tpi$g6v@tzlink.j51.com> - lepslog@j51.com (Louis Epstein) writes
:
:>
:>J Wunsch (j@uriah.heep.sax.de) wrote:
:>: Louis Epstein <lepslog@j51.com> wrote:
:>: >OK...where did you find a controller that handles a 9GB disk?The main ones
:>: >seem to stop at 8...which is why I ditched plans to use a 9 for news.
:>
:>: Why should a SCSI controller stop at 8 GB?
:>
:>: With 32-bit logical block numbers and the common value of 512 bytes
:>: per block, you can address
:>
:>: 2^(32+9)
:>: 2199023255552
:>
:>: bytes, or
:>
:>: 2^(32+9)/(2^30)
:>: 2048
:>
:>: gigabytes.
:>
:>Be that as it may,BusLogic and Adaptec are now making cards that can only
:>handle 8GB or smaller drives.
:>

The 8GB limitation is in the adapter BIOS. Once you have a software device 
driver loaded and running the show, the BIOS is out of the picture and the 
limitation goes away ... it's only a problem if you want to use a > 8GB drive 
under say MS-DOS without a driver.

-jl