Hi Guys,
Thank you all very much for your advices.
Just to add some points i've forgot:
This HD have 4 partitions. 2 of them are used to my two boot partitions with different system setups, and they are FFS, because i really don't rely on other FS that much. If something goes wrong, i need at least one partition with tools in it, that can try and repair the problem with other FS.
The other 2 partitions, have PFS3 on them. Also i've added lots of buffers to all the partitions.
I tried to benchmark all of them, and the results are almost the same. Nothing that could show so much difference. And this is another thing that make me think something is not the way it was supposed to be . . .
I didn't know about the UnitControl utility. I didn't know it could be called with parameters from the Startup script. I tried it from WB, but i thought that a reboot was needed to make the changes to take effect. I'll try this later.
And i thought about the RDB thing. Seems that this can be the problem.
This HD was previously used in my A1200T BPPC SCSI interface ! So the partitions was created there, and the system was installed there as well. As i don't have any other HD at hand, i just moved the HD to this new machine, and corrected some system configurations, so it could work on the A4000.
I'll try to get an IDE HD to copy all my files over, and repartition this SCSI HD. But let me first try the UnitControl trick.
By the way, what about the 40MB/S figures that I've read in somewhere, and is mentioned in the Cyberstorm Manual ? How can this be if there's only a maximum 20MB/s option on the Firmware's menu ? Is that information (in the menu that is) wrong ?
Thanks again guys. I really appreciatte your help.