Re: OT: SCSI Expert Needed



In article <haqb7o$iug$1@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Barry Watzman <WatzmanNOSPAM@xxxxxxxxxx> wrote:
Thanks.

The only known "SCSI-to-{whatever}" adapters that work with these Nikon
film scanners are the Ratoc adapters. Both USB and Firewire adapters
work, but there is a problem: They only work if you are using Hamrick
VueScan scanning software, they do not work with Nikon Scan, which talks
directly to the SCSI ports, apparently, and won't work with any adapter.
I do not know if the Adaptec USB2xchange works or not. I have all 3
adapters (both Ratoc models and the Adaptec model), but I want to stay
with Nikon Scan, hence I need a "real" SCSI port and not an adapter.

[Aside from actual scanning, I service these scanners (often and on a
moderately large scale] and need to do firmware updating, which, also,
doesn't work through SCSI to {whatever} adapters.]

So I need an INEXPENSIVE PCI Express SCSI port. [Inexpensive: I buy
Adaptec 2940 series PCI SCSI cards for $5-$10, sometimes used working
pulls but just about as often new old stock in sealed box.] Which
presents two problems, first, as far as I can find, the least expensive
PCI Express SCSI card is $150-$200 and, second, as far as I can find,
ALL of the PCI Express SCSI cards have a wide, 68-pin interface and the
scanner has a SCSI-II, HD50 "narrow" interface.

My real question was whether an adapter cable, or an adapter "dongle"
(68 pin plug on one side, 50 pin socket on the other side) would work.
Your response, and the other response, seem to suggest that it will.

That leaves me encouraged but, until I actually try it, skeptical.

:-)



My advice, if you are basically using the scsi card and pc for updating and
servicing these scanners, is to build up a slower second hand PC that has PCI
slots and then use one of the low cost 2940's you have to do your firmware
updates and testing. Keep your main PC for yourself. You can find used 2.4Ghz
pc's at places like salvation army stores or other trhift stores like theirs.

Or get one from your local university surplus center.

This is one at the University of Utah, look for a similar one at your
location.

http://fbs.admin.utah.edu/index.php/surplus/

Paul wrote:
daytripper wrote:
On Fri, 09 Oct 2009 21:08:02 -0400, Barry Watzman
<WatzmanNOSPAM@xxxxxxxxxx>
wrote:

Ok, being an "expert" is relative (an expert is anyone who knows more
than you do). And usually I am the SCSI expert. But now I need some
help from an expert's expert.

I need to use a Nikon LS-2000 SCSI scanner on a PC that has only
PCI-Express slots.

The only PCI-Express cards that I can find have "wide SCSI" (68-pin)
external ports. But the LS-2000 is an "old" SCSI device, 50-pin
SCSI-II interface (HD50F socket).

First question, anyone know of an inexpensive PCI Express SCSI card?
The only one I've seen at all is an Adaptec $200 card.

Second quesiton, even that card has only the 68-pin interface, how do
I connect a "narrow" SCSI device? Can I?

Thanks

"Inexpensive" and "SCSI" hardly ever get together ;-)

I found the Adaptec 29320LPE Single Channel Ultra 320 SCSI Controller
available for just under $150US. Check Nextag.

You can certainly attach an 8-bit scsi device to a 16b wide channel,
you just
need the right cable. I have a venerable 8bit async HP 4C scanner with
the
even more ancient Centronics connector cabled to a 68 pin external
connector
on a PCI 29320. It just takes the right cable...

Cheers


There is an HD68 to HD50 here, for going from wide to narrow. I have
one in my collection which is similar to this. Your Nikon could be
Single Ended (SE) and Async (up to 6MBsec, transfer rate varies with total
cable length due to async acknowledgement).

http://www.computercablestore.com/SCSI_Adapter_SCSI_3_HD68__PID906.aspx

There are a few pictures here, to help in identifying
the connector. In one case, I had to remove the securing elements
on my adapter, to connect to a device, as they were not mechanically
compatible.

http://support.doit.wisc.edu/showroom/page.php?id=3116

http://dirac.org/linux/misc/scsi/

I've only fiddled with a half dozen SCSI setups, so this
wasn't my "day job". It is a pretty expensive technology to
hook up, in terms of the prices charged for cables and
adapters.

I did see mention of something ideal for the job, but
apparently it isn't manufactured any more.

http://www.cwol.com/usb/usb-scsi-adapter-adaptec.htm

This is the replacement. USB2 is capable of 30MB/sec,
so should be able to handle 3-6MB/sec no problem.

"Ratoc USB 2.0 to Ultra SCSI Converter"
http://www.cwol.com/usb/usb-to-scsi-adapter-u2scx.htm

The MSRP is $99. That seems to be about the best price
I can find. I'd prefer to see some reviews, to understand
how well it works.

http://www.ratocsystems.com/english/products/U2SCX.html

Compatibility table.

http://www.ratocsystems.com/english/support/Compatible/u2scxlistwin.html

There aren't enough reviews here, to reach a conclusion.


http://www.amazon.com/USB2-0-Ultra-SCSI-Converter-Device/dp/B000EEQFHY/ref=sr_
1_2?ie=UTF8&s=miscellaneous&qid=1255144254&sr=8-2


Paul
.



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