Do you know how many pins the scsi port in the E6400 has? Probably 50, or less likely, 68. So, choose a drive with the same no. of pins, to avoid messing about with adapters. 80 pins is definitely a no no.
Then you need a SCSI ribbon cable : is it already installed in the sampler, along with the HD mounting kit? If so, count the pins! (See above.)
From my experience with AKAI recorders
, I'd say just buy a cheap, 2nd hand scsi drive on Ebay. SCSI drives have a longer life cycle than IDE drives, so 2nd hand is fine.
I'd assume if you got a drive bigger than 9gb then it wouldn't matter, as the EMU will only see 9gb, so disk size is not a pb.
Second hand scsi disks under 20gb are very cheap : I know, as I have several!
Frank