Strange SCSI Problem

[Martin W]

Hi. I just bought a Fire Port 40 Ultra Wide controller and I was really wanted to see the speed diference in my Baracuda Ultra Wide drive (I was using and ultra controller before). I set the max sync transfer rate for the drive to 40 MB/S and the bus to 16 bits. After I copied a file or two I got a drive write protect error. This happened even when I turned down the max trasfer rate to 20 MB/S. The only time the drive worked normaly was when I turned the transfer rate to 10 MB/S. It seems that I can only work at that setting no matter if the bus is set to 8 or 16 bits. I had the same problem with my old Adaptec Ultra controller. Can anyone tell me what is wrong and how can I fix it. I checked my drive on Seagates page and it is an Ultra Wide drive.
Thanks in advance.

[Aris]

Time for a better cable.

[Aris]

Forgot to ask.

How many devices do you have?

How many have termination?

The card and the last device should have termination, none should in between.

[Martin W]

I went through 5 different cables, and still there is no luck. I have only the drive and the SCSI controler inside the computer, and a Jazz drive as external. The drive is terminated, and both the Jazz and the controler have auto termination.
Once again I apreciate all the help.

[Aris]

Ah, try disconnecting ALL the externals. I forgot why but when you do all 3 of these:

wide SCSI
narrow SCSI
external SCSI

you can have problems.

Good luck.

[Martin W]

Thanks I will try that.

[Aris]

Hey! Let me know what happens.

I'm surprised others did not respond. Many hear know far more about SCSI than I.