Problems using Compactflash-card on C= laptop

[Zac67]

Try 1024 cyls, 16 heads, 64 sectors (512 MB) - this probably is the largest disk for that generation.

[Zac67]

Try 63 sectors and/or 15 heads, some BIOSes have slightly different limits.

Pre is some write precompensation I've forgotten the details about and is for ST506 only, it'll be ignored for IDE.
Lzone is the landing zone for parking the heads. There are no heads, of course, so this doesn't matter a bit. ;-)

PS: yes, that must be 63 sectors, 64 won't work, sorry.