I have done informal benchmarks between the CFFA3000 and my RamFAST Rev. D SCSI card with the stock 256k cache. Keep in mind that this was done before the latest CFFA3000 firmware with improved access times.
Boot up time from power-on to desktop.
CFFA3000 (no DMA support available): 44 seconds
RamFAST (DMA Off): 41 seconds
RamFAST (DMA On): 38 seconds
The RamFAST lives up to its name, even though its connected to an old, slow Apple 40SC external hard drive. Its most noticeable when closing Finder windows (at least on a machine with a TWGS running at 12.5Mhz with 32k cache). You get a pause when the CFFA3000 writes the FINDER.DATA file information before closing the window, while it instantly closes on the SCSI drives. CFFA volumes take a second to mount when returning to Finder, while the RamFAST volumes mount instantly. Part of it is DMA and part of it is aggressive caching. Chances are you won't notice any speed difference anyway if you are running a stock 2.8Mhz IIgs.
If it wasn't bottlenecked by an 8bit 1Mhz bus, the RamFAST is likely faster than Apple's built in SCSI implementations.
Boot up time from power-on to desktop.
CFFA3000 (no DMA support available): 44 seconds
RamFAST (DMA Off): 41 seconds
RamFAST (DMA On): 38 seconds
The RamFAST lives up to its name, even though its connected to an old, slow Apple 40SC external hard drive. Its most noticeable when closing Finder windows (at least on a machine with a TWGS running at 12.5Mhz with 32k cache). You get a pause when the CFFA3000 writes the FINDER.DATA file information before closing the window, while it instantly closes on the SCSI drives. CFFA volumes take a second to mount when returning to Finder, while the RamFAST volumes mount instantly. Part of it is DMA and part of it is aggressive caching. Chances are you won't notice any speed difference anyway if you are running a stock 2.8Mhz IIgs.
If it wasn't bottlenecked by an 8bit 1Mhz bus, the RamFAST is likely faster than Apple's built in SCSI implementations.