[sdiy] OT scsi testing

[John L Marshall]

Could be a temperature problem. Is your burner toasting itself? How is the
air flow around the burner? Is each end terminated ONLY? What is the
termination type (passive, active, forced perfect)? Other SCSI devices? Is
the signaling the same (LVD, SE) for all devices?


----- Original Message -----
From: Dave Krooshof <krooshof at xs4all.nl>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Thursday, July 26, 2001 2:52 PM
Subject: [sdiy] OT scsi testing


> Sorry to be so off topic...
> I have a question about testing a SCSI connection.
>
> I'm writing you guys, since I asume my problem is 'solderable'.
>
>
> ---------- way off topic area ----------
>
> The computer store just advices Buy A New One, which I do not dare to do
> as long as I'm not sure that *that's* the hardware causing problem.
>
> I rule out that the writer itself is broken, as it manages to complete a
> diskwrite in 25% of the cases.
> I rule  out software issues for the same reason, + that I didn't change my
> software configuration around the time cdr writes were starting to fail.
> AND:
> I get the following errors: (once every 20 minutes at random)
> - sense code 0x29: Power On, Reset, or Bus Device Reset Occurred.
> - Connection not Stable
> - But mostly the drive simply quits writing and hangs up the Toast
program.
>
> So...
> How can I narrow the problem down to a specific device?
> - tried two SCSI cables, both have the same error rate
> - wiggled cables and connectors: no sudden problems.
> - opened the case and checked internal connectors. Seem fine.
> Do you have any hints on DIY tests on SCSI (scopes and multitester
available)
>
>
>
> Thanks a bundle!
>
>
> Dave
>
>
>
>
> Hardware concerned:
> Mac G3/233 beige desktop, external Yamaha cdr400 SCSI 4x/6x in Lacie box.
> - The 'techtool' test of the SCSI chip (takes only 10 msec) reports "OK"
>
> Software:
> - I tried 4 toasting applications: Toast 4.3,  Toast 5.0, Masterlist 2.0,
> CDDA 2.0
> - I tried both the Apple CD/DVD rom and the Toast CD reader extension.
> - I reflashed the firmware to the latest version 1q.
>
>
>
>