SCSI configuration question

From: Guy Dallaire <dallaire_at_total.net>
Date: Mon, 07 Apr 1997 15:23:27

Dear managers,

I presently have a TZ87 and a TZ88 installed in 2 BA36R-AF shelves behind 2
dual-redundant HSZ40's. These 2 drives are taking valuable space in the
shelves and I would like to move them out of the HSZ40 configuration and
replace them with 6 4Gig drives.

I'm planning to do the follwoing and wanted to make sure that:

a) this is feasible
b) I've got the correct part numbers

I will order a BA36R-AF shelf with extra PW supply that I will mount in my
server rack. I know that you can split a BA36R-AF shelf in two, creating
two scsi buses, but I was wondering if these 2 buses can be used by two
different hosts.

I will also order 2 PCI SCSI controller cards and 2 cables for my 2 alpha
servers 2100. Here is what I plan to do:

                        ---------- HOST A (KZPAA) SCSI BUS 2
                        |
BA36R-AF: |
---------------- JA1 |
|P|P|TZ-|TZ-|x-|--------|
|W|W|87 |88 | | JB1
|R|R| | |x-|------------------ HOST B (KZPAA) SCSI BUS 2
---------------- Cable (Part #?)
              ^
             /|\
              |
             i/o module

What is the max lenght of the cable between the I/O module and the KZPAA
and what is the part # that I should order ?

Provided that I set the BA36R-AF jumpers to "split" it, and that I set the
ID jumpers on the TZ87 and TZ88, can I come out with a solution like this:

HOST A sees the TZ88 as SCSI-ID 2 on bus 2, HOST B sees the TZ87 as SCSI-ID
5 on bus 2

The BA356 documentation is talking about TERMINATOR BOARDS (BA35X-MB) and
BA35X-MC JUMPERS ? Do I have to order these things separatly or do they
come with the shelf ?

Thanks

Guy Dallaire
dallaire_at_total.net

"God only knows if god exists"
Received on Mon Apr 07 1997 - 21:35:06 NZST

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