cyberstorm mk3 and scsi speed

[Whaka]

Hi,

i have a little problem from long time now... but today, i want to understand what happend.

so, i have a CS MK3 and i use the onboard scsi with a 10k rpm 18 GB drive.
the chain is well terminated, as it should be. no problem with that.
but i have a little problem with transfer speed.

the controller is given for 40 MB/s, but in the firmware, it stuck at 20 MB max.
so, by defaut, i get half of the possibilites, syspeed give around 15 MB/s.

i can enable 40 MB/s transfer rate only by using the "unit control" utility from the workbench, and i can get full speed by this way (syspeed give around 30 MB/s)
but of course, it's not reboot resistant... i have to do this after every reboot.

all Mk3/ppc work this way ? or there's a problem with the firmware ?
i use the last available (44.71)

someone with an Mk3/ppc can check the scsi in the firmware to compare scsi option ?

thanks

[Whaka]

I don't know if changing firmware to default  to max speed is a good idea with SCSI. It might make the controller  incompatible with lower spec devices.

i think it's for that case, that everything can be set on "auto" mode
but i don't understand why the firmware don't allow the max...
and the phase 5 manual say nothing about advanced configuration, they just talk about termination...

your idea sounds good about finding the "thing" which  can activate the fastest mode with the unit control utility, but i have  no clue how to do this...

Is it running on synchronous mode?

yep. otherwise things really go down.

[Whaka]

thank you zipper
i'll investigate how to use it that way, but i think the "Period" option should do the trick.

but to be sure of one thing, can you check in the firmware if you can go above 20 Mhz ?

[Whaka]

you can simply use hdtoolbox for that, the cybppc.device give you the version number