Set J1/J2 jumpers to Hi speed mode, See post #488, When using CF originally setup with XUB 1.1.5 and you later re-flash with a recent revision of the XUB (New drive translation code) you will likely have to wipe / partition / format and reinstall, Likewise if you setup the CF card using a recent revision of the XUB and then go back to XUB 1.1.5 you will likely have to wipe and setup again.
So I finally got around to testing this, and did some benchmarks with a 4GB CF card using the 1.1.5 BIOS already on the glitchworks v4 card, and aside from not being able to boot directly off the CF card, it went well. The 1.1.5 BIOS displayed drives 80 and 81 in a menu (there's an MFM drive in the system) and booting from 80 or A: worked, and I could fdisk/format and run disktest and everything checked out. I figured not being able to boot off the CF card was due to LBA support in 1.1.5 so I didn't worry about it at the time.
Then I flashed r602 (from the 6300 itself) and now, on bootup, the v4 card can't see the CF card at all. Both Master and Slave (at 300h) show "not found". I was careful to load IDE_XT.BIN and change the card type to 6300/Olivetti M24, and not much else, and the flash appeared to be successful. Both J1/J2 jumpers on my board are set to compatibility mode (as opposed to hi-speed/chuckmod mode).
What am I missing? The card isn't bricked; the BIOS starts up fine, it just doesn't think there's anything on Master (when the 1.1.5 BIOS could see it just fine).
Also, I never saw a menu for picking the boot hard drive; was that removed between 1.1.5 and 2.0.0 b3, or did I miss another setting?