SCSI interfaces: Trsfer speeds

Have DDS dirve,Sony SDT9000. Has 50 pin connector on drive but has a 50 to 68 pin convertor on cable ribbon. Since 50 pin(SCSI 2) only supports 10MB ps transfer rates,but the 60 pin can support between 20 to 80 MBps, is it possible that I can get 80 out of it? Have not upgraded firmware yet. SCSI card supports Ultra160,have 50 and 68 pin bus connections.

50 pin (narrow) SCSI should support up to 40 and 80 Mb Ultra SCSI on devices 0 through 7 on the cable. 68 pin Wide SCSI will support up to 160, 320, and 640 Mb Enhanced Ultra Wide SCSI rates depending on the host card and device. A 50 pin device on a 68 pin adapter is still a 50 pin device and will not use Wide SCSI.

Recommendation is to use 68 pin SCSI for fastest 68 pin drives and consider the 50 pin drive a secondary drive. The bus mastering and other enhancements to SCSI will still give you a noticeable improvement over ATAPI/IDE if you set this up right.