Check two things:
1) How does it handle master + slave? will it occupy the slave position regardless if it's used elsewhere? Otoh, some creative re-routed P-ATA pins could solve it.
2) How is termination dealt with? signal path stubs are bad news.
Thanks, I was thinking that this would be the sort of thing to keep an eye out for. Any idea how I might be able to determine these things, either from a product description or looking at a board (jumpers or such)?
@ Honkybear
Ah, thanks for the suggestion, but this is for an A4000, so Kipper's adapters won't work in this situation.