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Connecting U320 LVD/SE HBA with narrow SCSI-1 device?

Newsgroups comp.periphs.scsi
Date 2021-05-24 02:56 -0700
Message-ID <9a30134d-3a9e-4894-99de-362135a3bec6n@googlegroups.com> (permalink)
Subject Connecting U320 LVD/SE HBA with narrow SCSI-1 device?
From James Youngman <james@youngman.org>

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I (will soon) have a LSI LSI20320IE SCSI PCI-E HBA.  That has, I think, a single VHDCI ("Alt 4, P-cable connector") connector. According to the manufacturer's manual, it features LVD/SE termination.

I would like to use it to access a tape drive capable of reading DDS-1 and DDS-2 tapes.  

Because backward compatibility for DDS seems like a bit of a lottery, it seems reasonable to get a DDS2 tape drive (so that I have the best shot of being able to also read the DDS1 tapes). IOW, I'm worried that if I get, say, a DDS-3 drive it may no longer read DDS-1.  The DDS-2 tape drives that I can spot on eBay mostly seem to have the Centronics / CN50 / SCSI-1 / "Alternative 2, A-cable connector" connectors. I suppose I'm going to end up buying one of these, though I haven't chosen one in particular.   The HBA and the tape drive will be the only devices on the SCSI bus.

What cabling and termination am I going to need in order to make this work? Any tips on where to buy those?

Can I, for example, just use a cable like this one <https://www.ebay.ie/itm/361858629574> and use a normal CN50 active terminator on the tape unit?   Or might that not work?   If it won't work, why won't it work?   What should I do instead?  (Can I assume that such a cable would terminate the upper byte of the SCSI channel?)

(I'm not concerned about the performance aspects of this, just whether it works at all).

Thanks,
James.

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Connecting U320 LVD/SE HBA with narrow SCSI-1 device? James Youngman <james@youngman.org> - 2021-05-24 02:56 -0700
  Re: Connecting U320 LVD/SE HBA with narrow SCSI-1 device? Michael Bäuerle <michael.baeuerle@gmx.net> - 2021-05-24 12:34 +0200

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