Jon asks:
 
>      Did you try to use the SCSI A/B Switch?  I have found several
 
no...I sent it to a friend to try, and I don't know if he put it on
a 3000 or a Mac.
 
> I/O Channel.  My thoughts are to make sure the drive is not in use on
> the
> first HP3000, down the LDev (possible powering it off???), flip the
> A/B
> switch, (power up, if needed), and then up the LDev on the second
> HP3000.
 
We've had good luck doing that with an HPIB switch, although HP recommended
against it in the mid '80s.
 
Still, I'd be cautious if the ldev to be switched is on a SCSI channel
with anything else!
 
If the drive *is* on a channel with another device, I'd want to have an
Aa/Bb switch (i.e., one that connects computer A to device a, and
computer B to device b in one position, and A to b, and B to a in the
other position).  Why?  Because I'd plug my tape drive (*AND* terminator)
into "a", and a terminator into "b" ...
so that both SCSI chains (the one from computer A and the one from computer
B) are properly terminated.
 
 
--
Stan Sieler                                          [log in to unmask]
                                     http://www.allegro.com/sieler.html