On 09/07/2019 19.42, Mark Lloyd wrote:
On 7/9/19 8:49 AM, Paul wrote:

[snip]

Take your $300 6TB hard drive, and using an HPA,
clip it down to 2GB.

2GB is the maximum file size under DOS (NT operating systems made that
4GB) on FAT file systems.

FAT allows partition sizes up to 2TB (use DOS 7.1 for FAT32). although
there might be some lower limit somewhere.

[snip]

https://www.tldp.org/HOWTO/Large-Disk-HOWTO-4.html

Probably this one applies:

BIOS Int 13 - the 8.5 GB limit

At most 1024 cylinders (numbered 0-1023), 256 heads (numbered
0-255), 63 sectors/track (numbered 1-63) for a maximum total capacity of
8455716864 bytes (8.5 GB). This is a serious limitation today. It means
that DOS cannot use present day large disks.

--
Cheers, Carlos.