Fastlane Z3 Speed

[amiadudeorwat]

There are actually two command line utilities for the Fastlane the first one is z3dmacontrol, this sets the dma mode for the version of buster you're using such as:
C:z3dmacontrol buster11

Then unitcontrol something like this should work:
C:unitcontrol Unit 1 Period 10 Offset 8

Replace Unit 1 with the SCSI unit number of your device.
After you run z3dmacontrol buster11 (or 9) run the gui version of UnitControl and play around with the settings first.  Period 10 specifies the transfer speed I believe.  Offset 8, I don't remember what this does.  But you can make changes when using the gui mode and do a benchmark to see if it improved.  Also there is a utility on the Fastlane disk called CheckMask to make sure you selected the correct mask in HDToolbox.

[amiadudeorwat]

I would suggest testing with RSCP, you may find that you are getting higher transfer rates with z3dmacontrol but I bet your CPU usage is really high.  
With z3dmacontrol and the proper mask setting, NOT maxtransfer, you should see only about 10% CPU usage running RSCP.

Secondly though you may have an active terminator on the Acard, check to see if the resistor packs around the internal 50 pin connector are installed.  If they are, try removing them and installing an external active terminator.  
If they are not, definitely install an external terminator.

What system is this in A4000 or A3000?

[amiadudeorwat]

The resistor packs shouldn't be soldered on so you should just be able to pull them out.  Don't bother if you don't have an external active terminator to plug in though.

For another interesting test, if you have memory on the Fastlane, get changemempri
http://aminet.net/package/util/cli/ChangeMemPri
And set the Fastlane RAM to highest priority.  You should see your transfer speeds top out somewhere around 9MB/s if everything else is working right.  You wouldn't want to do this for general usage but it is odd.  This also works for an A4091 if you have any Z3 RAM.