Denys,

   I'm not sure how the HP-3000 controller handles it, but on my Adaptec
controller, the speed is negotiated
on a per-device basis.  ATA interfaces operate at the speed of the slowest
device.

David N. Lukenbill
Computer Sciences Corporation




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Subject:  Re: 12H Array



[snip]
On the other hand, you can attach any type of SCSI devices together
(provided
they are either all differential or all single-ended or all LVD.)  The
chain
will run at the speed of the slowest peripheral.  So you can have a regular
FW
SCSI device in a chain with Ultra SCSI-3 devices, but overall the speed
will be
the speed of the FW device.  So in your example, yes, you can plug in
Ultra160
SCSI devices to you FW adapter, and they will run at regular FW speeds, not
the
other way around.


[snip]