First post, by PhilsComputerLab
- Hardware Mod
The topic of blasting through the 504 MiB BIOS / capacity barrier on very old Computer keeps popping up. I did a video on Ontrack, but this software is commercial, very hard to track down and not even available for sale.
So I have turned to EZ-Drive, specifically the Western Digital edition version 9.03W which is freely available and happens to work with non-Western Digital drives as well 😀
There is also a video, but the write up below covers all the steps: http://youtu.be/8LzCB6kDVC8
I recommend using EZ-Drive when all BIOS options have failed to break the 504 MiB barrier.
The goal is to have four 2 GB partitions, which is the maximum MS-DOS 6.22 supports.
I'm using an old Acer OEM system which has a 504 MiB BIOS capacity limitation as shown below:
I sucessfully tested this version of EZ-Drive on a 80 GB Seagate IDE, 20 GB Western Digital IDE and 4 GB Compact Flash card.
Creating the EZ-Drive boot floppy
Download it from here: http://www.philscomputerlab.com/ez-drive.html
Put it on a floppy and start the executable:
Setting up the BIOS
As per documentation there are three options:
I went with the second options:
Boot from the EZ-Drive boot floppy
Select "Fully Automatic Install":
Confirm with "YES" to delete existing data:
Insert a MS-DOS boot disk so EZ-Drive can copy system files:
Press a key:
Confirm "Use These Partition Sizes":
Here we are getting an error. This error did not appear on the CF card. I assume that it struggles with so many partitions:
It's not a problem though. All we need to do is format the partitions manually. EZ-Drive has successfully created the partitions but was unable to format them.
The 4 GB CF card didn't throw an error and EZ-Drive formatted the partitions:
Format partitions and install MS-DOS
Restart and boot from C:
It is crucial that you always boot from C: so that EZ-BIOS is getting loaded! If you want to boot from A: then boot from C: but hold down the CTRL key. A boot menu will appear allowing you to continue booting from A:
Only at the very first boot you don't have to press CRTL because a different menu appears:
Now we format all of the partitions:
format c: /u
format d: /u
format e: /u
format f: /u
Now we have four 2 GB partitions ready to go!
Reboot the PC, press CTRL and continue booting from your MS-DOS 6.22 installation floppy to install MS-DOS 6.22 onto your machine.
Two steps are needed to remove EZ-Drive.
Under "Advanced Options" > EZ-BIOS Setup > Controlled by EZ-BIOS set to Disabled:
Select "Uninstall EZ-BIOS":
EZ-Drive has now been removed from your drive!