Well It seems that the modern 40 gb hard drive on the Buddha is about 3 times the speed of the old 100 mb scsi drive on my GVP 030 board.
Buddha/40 gb drive: 85 read/writes a second
GVP/100 mb scsi drive 33 read/writes a second
hope that helps
Edit:
I just looked at the specs on one of the amiga hardware sites that said the max transfer rates for each controller were
GVP scsi: 1.2 MB/s
Buddha IDE 3.58 MB/s
I guess that explains my numbers
You must have the AT-bus 2000 if its IDE