For OSX you need an 8gb or smaller partition. For OS 9 you can use anything up to 128gb on the built in bus.
Yes, that's what I recall reading as well.I'm too lazy to try to find a mirror of the explanation why, but I vaguely recall reading that *technically* that isn't quite true, and that the 8GB "limit" can get you even if you're running OS 9. TL;DR, said vague recollection is that the classic OS will blithely install in a larger partition on those machines, and will by all appearances work fine, but if for some reason certain parts of the OS/System File later end up being moved above the 8GB mark (because you upgrade the OS at some point while there are already other files on the disk, or whatever) it will fail. Apple didn't discover this issue until later because they never sold the machines with IDE drives big enough to be affected, which is why OS 9's installer doesn't have a block to save you from it. OS X "knows".
But yes, IDE and SATA cards are a legitimate workaround.
Built in video is fine for OS 9. I concentrate mostly with storage speeds since that is the weak link so SCSI or IDE card, USB, and either a capture card or better video. 10MB Ethernet you can live with for most tasks.That three slot limit is a killer...honestly wish we had gotten 4 slots instead of the personality card slot. I can't have VGA, USB, 10/100 Ethernet, and PCI IDE like I'd prefer.
I'm pretty sure that's not true, IE, that the limitation is *explicitly* a bug in the driver for the IDE chipset. No such limitation applies to SCSI cards so far as is documented, which would be the case if it were an HFS+ problem. The same bug exists in the firmware for the Rev A-through-D (trayload) iMacs. (It's sort of mysterious why Apple never fixed it for the tray-loaders, because the iMacs had flashable firmware, unlike the Beige. They *could* have fixed it, at least in theory. My guess why they didn't is just something along the lines of "that's not how Apple rolls". They never sold them with drives big enough to have the problem, so not their business.)Beware that the 8GB limit for your bootable volume is still present even on controller cards if I remember right. I think it had something to do with OF not beeing able to read files from HFS+ beyond 8GB.