@jmmijo do you not use SCSI at all?
I used to have 6 seagade barracuda scsi hard drives and the transfer rate was great, although my scsi card has now been demoted to running an 8X scsi writer and an old 4X compaq scsi cdrom.
I have a scsi card out of a big ibm server that can run up to 300 devices!!!
But it looks like scsi is dying