On Mon, 3 Apr 2000, Mr. James W. Laferriere suggests:
> A rule of thumb I apply to HP , "if it's wide, it's DIFFERENTIAL .'
> There were some -very- early drives that HP put out that are
> Singel ended , but if my memory serves they were not wide .
Hmm, that could be very unfortunate if a high voltage differential device
were to be active on a single ended bus. If a HVD device were to power
up active on a SE bus, then smoke should come out of a few things -- for
one, the SE bus would short out a HVD device. If would also be a
unquestionable violation of the HVD interface specs -- there's supposed to
be some fault isolation hardware on the device (drive in this case) to
prevent it from putting high voltage (+/-15V?) onto the bus. [Exabyte and
Seagate both follow the rules. I have no experience with HP.]
However, if they were HVD drives, then they shouldn't even be visable on
a SE bus. The pinout is different.
You're going to have to find a SCSI CONTROLLER, not a RAID CONTROLLER to
diagnose your problems. The Mylex controller is not letting you close
enough to the SCSI bus to see what's wrong. Go to your local computer
warehouse and get a SCSI controller (a generic NCR/Symbios/who owns them now
wide card will do.) Good luck.
--Ricky
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