Just curious I have a a SCSI to IDE converter and use a GVP combo board in my A2000, the speed reported in sysinfo is 2,100,000 bytes/sec but if I use no accelerator and GVO HDD controller I get 2,300,000 as the speed. Does it make sense that an unaccelerated HDD controler get higher speed thatn the controller of an 030 50mhz? If so is there nay benefit of raunning SCSI of teh acclerator vs the ZII HHD controller?
Just as refrence, the same setup in an A3000 030/25 gives 2,900,000 as speed
Couple of points:
1. According to Ralph Babel, the raw transfer rate of GVP accelerators (w/33C93A SCSI) is slower than the GVP Zorro SCSI cards. Best case scenario, 2.3 MB/s, vs 3.5 MB/s (Z2 limit) with a Zorro card.
2. Even so, I would stick with the accelerator SCSI. DMA into accelerator RAM is much better than copying data across the (non-DMA) Z2 bus. The system should remain a bit more responsive overall.
3. Make sure synchronous transfers are enabled in the RDB.
4. Try a better measuring tool, like
RSCP or Ralph's RawScsiSpeed.
