IBM PC-DOS 2000 vs DR-DOS and FreeDos

January 1, 2010 at 09:25:26
Specs: DOS 6.22, pentium 133/ 48 mb

I have a 20 GB drive that i recently installed on my old pentium DOS machine. No issues with the BIOS.

Unfortunary, MS - DOS 6.22 won't let me use more than 8.4 GB of the drive.

I want to use all of the 20 GB, wich DOS OS should I swap to?

1. IBM PC-DOS 2000
3. FreeDOS


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January 1, 2010 at 09:38:45
Doesn't really matter, which of the DOS versions you use.
I don't know about IBM PC-DOS 2000, but DR-DOS and FreeDOS will work for you.

I extracted the DOS Version from the Windows 98se and use it for such things.

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January 1, 2010 at 14:12:44
I suspect it is the bios. Two basic ways to get around it exist. One is a supported bios the other is an overlay program.

As you say though dox 6 and win 3 won't support them anyway.

Pretty sure freedos has that fixed. I doubt IBM's dos fixed it.

Nothing wrong with partitions.

Playing to the angels
Les Paul (1915-2009)

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January 1, 2010 at 14:19:21
I think you are going to have the same problem with all all 16 bit DOS versions as the maximum volume size is 2 GBs, a huge size when MS-DOS 6.22 was current. You could get more using a third party formatting system that would use cluster greater than 32 kBs

8.4 Gbs seems more like a BIOS limitation which no amount of software is going to overcome.


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Related Solutions

January 1, 2010 at 15:14:32
I think Ghost 2003 uses DR DOS and can handle drives of any kind. DR DOS is not free.

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January 1, 2010 at 20:37:10
Another option would be to SYS the drive with a 98 bootdisk and then copy the contents of the windows\command folder on a 98 drive into a dos folder on the 20 gig. You'd need to add a few other files but it'a fairly easy walk-through.

That's after you settle the 8.4 gig issue. It is, as already mentioned, a bios limitation. Besides an overlay you could also install an ATA add-on card. You could probably find a cheap ATA66 card on ebay.

Check here for fat32 compatible dos:

Ubuntu Cheeta, Ubuntu !

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