I thought I'd add my results to the mix, as I have a 1.1Gb native SCSI drive (IBM DPRS-21215) attached to the SCSI controller on the motherboard of my Duo 2300c:
Using Norton Utilities 6: System Info
Mac OS Disk Cache: 128K Virtual Mem. off AppleTalk Inactive 56MB of real RAM
SCSI to SCSI: 75
Mac OS Disk Cache: 2048
SCSI to SCSI: 95.8
So, not *too* bad for an olde SCSI drive, although I expected better. It's clearly better than the IDE-to-SCSI adapter experience reported by Thomas. And the Disk Cache behavior is logical on my system.
I switched to a SCSI drive from IDE for my Duo because the SCSI drive made things visibly snappier- of course I was comparing an old 1.2Gb IDE drive, not the 10Gb Travelstar (with it's bigger cache and newer mechanisms) mentioned in T's report.
Now this makes me want to experiment with third-party disk drivers, to see if that could squeeze more kick out of my poor old SCSI drive... any suggestions (FWB...LaCie...?)
See you around, David
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