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View Full Version : DFI K6BV3+/66 & hard drive capacity



Chromedome45
April 23rd, 2013, 02:19 PM
Hi all, Ok got this weird problem. I have a 2GB HD in my Pentium 166 system here and I have run the auto detect of the hard drive. And it detects the full capacity of 2112MB. However DOS 5.0 only sees it as a 528MB. I tried to hook up a 2GB CF card and same result. What gives? Any ideas.
Maybe try DOS 6.22? :confused:

Stone
April 23rd, 2013, 02:32 PM
It seems like *this* problem gets discussed on a nearly weekly basis. There is very detailed information already available so I'm going to be brief.

The 528MB problem is a BIOS limitation. That's all your BIOS can handle. You need either a BIOS update, a DDO or a smaller drive. There are no other solutions.

Old Thrashbarg
April 23rd, 2013, 02:42 PM
There is very detailed information already available so I'm going to be brief.

And you're also going to be wrong. It's a Super 7 board, several years newer than any 528MB limits... I believe that board will even accept up to 128GB drives with the latest BIOS.

Stone
April 23rd, 2013, 03:57 PM
Then why does it fail to recognize over 528MB on more than one drive? This is the classic symptom of the 1024 cylinder limitation.

Chuck(G)
April 23rd, 2013, 04:11 PM
DOS 5.0 could support a FAT16 partition size of up to 2GB, so apparently, that's not it. Do you have LBA enabled?

Chromedome45
April 23rd, 2013, 05:00 PM
When I have LBA enabled is when it drops to 528. If I have it set to CHS it is reported as 2112 but FDISK only sees 528! Odd BIOS is dated 2000.

Stone
April 23rd, 2013, 06:11 PM
When I have LBA enabled is when it drops to 528. If I have it set to CHS it is reported as 2112 but FDISK only sees 528! Odd BIOS is dated 2000.You would think that a BIOS dated 2000 would be a translating BIOS. So the question is, is this a translating or non-translating BIOS?

Chromedome45
April 23rd, 2013, 06:31 PM
This is the board in question. I have an identical board in another system dual booting 95 & NT 4 and it sees the full HD size of 6GB. Got me scratching my head...
http://www.itox.com/pages/products/mothers/comercialmb/k6bv3.php

Stone
April 23rd, 2013, 06:45 PM
Just for kicks, try switching the BIOSes. :-)

Chromedome45
April 23rd, 2013, 07:57 PM
I thought about it. Maybe tomorrow

Chuck(G)
April 23rd, 2013, 10:22 PM
Stupid question, but the drive didn't have a DDO installed on it, did it? What make/model of hard drive are you using?

Stone
April 24th, 2013, 03:48 AM
Not likely since the 2GB CF card gave the same result.

Chromedome45
April 24th, 2013, 07:06 AM
Seagate st2112 no DDO

Chromedome45
April 24th, 2013, 09:28 AM
Went ahead and tried a 1GB drive and fdisk found the total capacity of the drive same with 6GB drive. Most be an issue with that Seagate 2112. But why the CF Card?
only seen as 528? Kinda strange.

Stone
April 24th, 2013, 10:20 AM
Maybe it's like Chuck said and there's a DDO lurking on them. They don't necessarily show any files as they hide in the boot sector. If you put the drive in question into a machine without a translating BIOS you may be able to coax it out (DDO) if it's in there.

Chuck(G)
April 24th, 2013, 10:25 AM
What does MSD say about the drive?

arrow_runner
April 24th, 2013, 10:47 AM
I vaguely remember having a weird issue like this a long, long time ago. I think you need to completely blow out the MBR (using the dd linux command or something similar) on the drive, power down the computer, then power it back up and try running fdisk again.

RWallmow
April 24th, 2013, 12:12 PM
Some hard drives had "limit capacity" jumpers (or firmware cap limits) to limit them to 1024cyl for older PCs. But that wouldn't explain the CF card, but I have seen quite a few CF cards that don't play well in "IDE mode", might have two problems here, that just have similar symptoms.

Has this drive and CF card been tested in another system? How do they act in a "modern" PC? Arrow_runner may be on to something too I have seen FAT tables so hosed that no DOS utilities could manipulate them or make them right.

What is the make/model of CF card, I have run into LOTS of generic cards that don't do IDE mode well, but even some name brand ones, like Toshiba don't do it well. Best to drop the money on a Sandisk in my opinion, they have never let me down in IDE mode ;-)

Old Thrashbarg
April 24th, 2013, 12:33 PM
But that wouldn't explain the CF card, but I have seen quite a few CF cards that don't play well in "IDE mode", might have two problems here, that just have similar symptoms.

That's kinda what I'm thinking too. CF cards make great hard drives for DOS machines if you can get one that will behave itself, but unfortunately that's a really big "if". A lot of them have various problems out-of-the-box... some won't work at all, some will look like they work but cause all sorts of strange issues when you actually go to use them, and some of 'em you have to jump through all sorts of hoops with arcane utilities to properly enable IDE mode.

Chromedome45
April 24th, 2013, 02:32 PM
The CF card is a Centon. Got it at TigerDirect a couple of years ago. I used it with the XT-IDE board in one my Tandy 1000's I had and it worked great. I have also used it with Win95 in the past and had full capacity. Well right now I'm running the 6GB in it so i'll try something again with it later. And that was on my other Pentium system.

Also I forgot what is DDO? excuse stupidity.

Chromedome45
April 25th, 2013, 04:53 AM
I think I'll install a drive tray and experiment around with my drives some. I tried FDISK/MBR on the 2112 and it still only sees 528. Somewhere I have a utility that can restore some of these "cut down in size" drives. Used it once on a 20GB that was actually a 40GB. And restored it back to full size. Can't remember the name of it now. The utility that is.

Stone
April 25th, 2013, 05:37 AM
What's the model # on that drive?

RWallmow
April 25th, 2013, 05:54 AM
I think I'll install a drive tray and experiment around with my drives some. I tried FDISK/MBR on the 2112 and it still only sees 528. Somewhere I have a utility that can restore some of these "cut down in size" drives. Used it once on a 20GB that was actually a 40GB. And restored it back to full size. Can't remember the name of it now. The utility that is.

Try some kind of linux live CD and see if you can whack out any partitions from it, or if you can even create a FAT partition of the full size.

Chromedome45
April 25th, 2013, 09:16 AM
Seagate Medalist 6422 6 GB. As far as Linux I have a few oldies that might work on this system. I'll try that too.

Stone
April 25th, 2013, 09:18 AM
Seagate Medalist 6422 6 GB. As far as Linux I have a few oldies that might work on this system. I'll try that too.No, the 2GB drive that only gives 528MB.

Chuck(G)
April 25th, 2013, 10:15 AM
Let's see what the drive says about itself: Try running the attached (DOS) program.

Chromedome45
April 25th, 2013, 10:43 AM
I actually just got it fixed. Used a program called HDAT2 to wipe out the drive. Now Fdisk sees the entire 2.1 GB!

Chuck(G)
April 25th, 2013, 10:45 AM
Told you it was a DDO... :) They're hard to see in that they redirect INT 13H services.