This may or may not be what you are looking for:
Recently, this past week, I've been playing with my 386/40 and attempted to install a SanDisk Ultra CF card (4 GB) which is partitioned down to about 2 GB each. The BIOS in this old girl is AMI from 1993. When I select 'Auto Detect Hard Drive' from the BIOS menu this is what I see from the CF card:
Hard Disk C: Type: 47-USER TYPE Cyln = 7751 Head = 16 WPcom = 65535 L Zone = 7751 Sect = 63 Size 3815 MB
In a previous thread I complained that the CF card wasn't performing as expected; i.e., some minor glitches in some files and programs. The OS in question on that CF card was MS-DOS 6.22. I had previously partitioned the CF card for 2 GB for the primary and the rest of the 4 GB went to the extended partition. Maybe I made a rookie mistake. After further review, (eh) it seems that the primary partition was actually a little over the 2 GB DOS limit, about 2.1 GB instead of 2 GB. In my way of thinking, this may have been enough to throw things ever so slightly out of whack. So, what I'm doing now is FDISK'ing the CF to 1.9 GB in the primary and we'll see how it goes. My CF card adapter has a garden variety IDE header and powers up via a floppy drive type power connector. So, the PC's BIOS is able to find the CF automatically and render the required setting. On the other hand, I also have one of the first (Hargle special) XT-IDE adapters. This one was slapped into my 1000SX and it just runs. I'm betting that if your BIOS has the hard drive search feature, you'll be all set and won't have to fiddle with the settings. I didn't men to steal your thread, just thought a little background on some the problems with CF cards might be helpful.