From: "da Silva, Joe" 

Hi all,

Interesting ... Just noticed the send date was 2009/10/2,
yet the receive date was 2010/1/3 ... snail mail ???

Anyway, LBA addressing for MS-DOS started at 7.00
(W95). Later, FAT32 support was added at 7.10 (W95A).

If your BIOS has eXtended Int $13 functions and your DOS
supports LBA, you can exceed the 7.8G barrier, provided
your partition type is LBA (eg. FAT16x or FAT32x) or is
a traditional partition type within an LBA extended
partition. Ignoring BIOS bugs (eg. Award 4.51PG), the
next barrier is 128G.

However, there are some nasty LBA bugs in the MS-DOS 7.XX
(also 8.00) implementation when you have both CHS and LBA
partitions. Steven Saunderson made a patched 'IO.SYS' to
correct these bugs, but I have just found it can introduce
problems with some partition combinations. I have reversed
one of his changes, and have a revised patch available via
my web page : http://jds.com-t.com/general.html

Joe.

> 

Joe da Silva
Senior Electronic Engineer
Landis+Gyr
Phone: +61 2 9690 7309
joe.dasilva{at}landisgyr.com
http://www.landisgyr.com/

Manage Energy Better-----Original Message-----
> From: Mike Tripp [mailto:ccoky{at}iglou.com]
> Sent: Friday, October 02, 2009 12:44 AM
> To: opendos{at}delorie.com
> Subject: MS-DOS 6.22
> 
> 
> Originally to: Kevin Klement
> 
> Hello Kevin!
> 
> 30 Sep 09 17:27, Kevin Klement wrote to mark lewis:
> 
>  KK> I know MS-DOS FAT16 can only partition 2GB drive, I have 
> a 200GB drive
>  KK> and I want to use MS-DOS 6.22 on it, and make some extended
>  KK> partitions, you know may be C: D: E: F: etc...
> 
>  KK> I had a program called EZ-BIOS to fool the BIOS into 
> doing this, but I
>  KK> cant find it, any suggestion on a good program to do this?
> 
> Your BIOS doesn't support LBA or does 200GB surpass a limit 
> to the LBA 
> implementation?  I remember the wall at 8GB, but I don't 
> think I've ever 
> installed DOS on more than a 10GB.  All that needed was a new 
> enough BIOS with 
> LBA support and maybe "yes" to large disk support prompt in 
> FDISK, which I think 
> came later after 6.22.
> 
> For software solutions, both Seagate and WD have bundled 
> Ontrack and similar 
> with the retail versions of their HDs.  If you don't have a 
> recent utility CD, 
> they can probably be downloaded from the HD vendor's sites.  
> They are usually 
> crippled to work specifically with the source vendor's drives 
> though, so hit the 
> right site.  Never had to use them myself, so can't vouch for 
> the results.
> 
> .\\ike
> 
> 
> 
> 
> 

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