The fastest I ever got on the 3k SCSI is 4.4 m/s. Which for it's day was real fast. Boot times and usage at 4.4 or 24 m/s is not real noticable since file sizes on the Amiga are so small.
My Cyberstorm SCSI yields about 24 m/s with my Acard SCSI to SATA converter on a SSD. To be honest, as I said not a big visual difference between the native scsi and the cyberstorm for IO in normal usage.
The 3K is an all around great box, the scsi is no exception with DMA transfers.
Never tried a Micro SD interface. I went with SSD's and I haven't been disappointed.
SCSI is certainly much better than IDE from that era. IDE killed the performance of my 4000, so I went with SCSI on the warp engine and never looked back. IDE uses to much cpu for IO on the 4000, SCSI was always so elegant with IO in comparison.
