2GB or 4GB (with System 7.5) is going to be the max. The limitation is in the System, not in the hardware, so a Nubus Jackhammer will do nothing for you in this regard. I am also not sure what it could do in the way speeding up reads and writes to an IDE drive on a bridge, but that would be interesting to see.
There is no real reason, mind you, to have a drive over 2GB in a Mac II of any shape or size, beyond the fact that the onward march of technology has made it just about possible in recent years. The machinery is just not designed to, or even conceived to be able to, fill up that much space.
Mind you, in a Quadra 840av, I have a Jackhammer with an 18GB RAID (2x9.1GB IBMs), but that is more for the sort of AV work the 840av was designed to do - and I run this system under OS8.1, which makes the large partitions not only possible to have, but also worthwhile having.
What I mean by this last point is that even if you could format the Maxtor as a 30GB drive under System 6 or 7, you would not get anything like 30GB of drive storage because of the limitations of the formatting under those systems (HFS rather than HFS+). You'll get much more sheer storage under Systems 6 and 7.1, if that is what you want, by sticking to 2GB partitions. That might also be the case even under 7.5.
There is no real reason, mind you, to have a drive over 2GB in a Mac II of any shape or size, beyond the fact that the onward march of technology has made it just about possible in recent years. The machinery is just not designed to, or even conceived to be able to, fill up that much space.
Mind you, in a Quadra 840av, I have a Jackhammer with an 18GB RAID (2x9.1GB IBMs), but that is more for the sort of AV work the 840av was designed to do - and I run this system under OS8.1, which makes the large partitions not only possible to have, but also worthwhile having.
What I mean by this last point is that even if you could format the Maxtor as a 30GB drive under System 6 or 7, you would not get anything like 30GB of drive storage because of the limitations of the formatting under those systems (HFS rather than HFS+). You'll get much more sheer storage under Systems 6 and 7.1, if that is what you want, by sticking to 2GB partitions. That might also be the case even under 7.5.