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This <a
href="https://en.wikipedia.org/wiki/Parallel_SCSI#Comparison_table">https://en.wikipedia.org/wiki/Parallel_SCSI#Comparison_table</a>
might help you narrow it down.<br>
<br>
And, quoting Wikipedia:<br>
<blockquote type="cite">
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charset=windows-1252">
<h4 style="color: black; font-weight: bold; margin: 0.3em 0px 0px;
overflow: hidden; padding-top: 0.5em; padding-bottom: 0px;
border-bottom-style: none; font-size: 14px; line-height:
22.3999996185303px; font-family: sans-serif; font-style: normal;
font-variant: normal; letter-spacing: normal; orphans: auto;
text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: 1; word-spacing: 0px;
-webkit-text-stroke-width: 0px; background: none rgb(255, 255,
255);"><span class="mw-headline" id="Interoperability">Interoperability</span><span
class="mw-editsection" style="-webkit-user-select: none;
font-size: small; font-weight: normal; margin-left: 1em;
vertical-align: baseline; line-height: 1em; display:
inline-block; white-space: nowrap; unicode-bidi:
-webkit-isolate; font-family: sans-serif;"><span
class="mw-editsection-bracket" style="margin-right: 0px;
color: rgb(85, 85, 85); margin-left: 0px;">[</span><a
href="https://en.wikipedia.org/w/index.php?title=SCSI_connector&action=edit&section=10"
title="Edit section: Interoperability"
style="text-decoration: none; color: rgb(11, 0, 128);
background: none;">edit</a><span
class="mw-editsection-bracket" style="margin-left: 0px;
color: rgb(85, 85, 85); margin-right: 0px;">]</span></span></h4>
<p style="margin: 0.5em 0px; line-height: 22.3999996185303px;
color: rgb(37, 37, 37); font-family: sans-serif; font-size:
14px; font-style: normal; font-variant: normal; font-weight:
normal; letter-spacing: normal; orphans: auto; text-align:
start; text-indent: 0px; text-transform: none; white-space:
normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width:
0px; background-color: rgb(255, 255, 255);">There are adapters
between most types of parallel SCSI connector, and some
companies will manufacture custom cables to guarantee having the
correct connectors. An adapter from narrow to wide must include
termination to work properly.</p>
<p style="margin: 0.5em 0px; line-height: 22.3999996185303px;
color: rgb(37, 37, 37); font-family: sans-serif; font-size:
14px; font-style: normal; font-variant: normal; font-weight:
normal; letter-spacing: normal; orphans: auto; text-align:
start; text-indent: 0px; text-transform: none; white-space:
normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width:
0px; background-color: rgb(255, 255, 255);">Different SCSI
standards use the same SCSI connectors as in HVD and LVD SCSI
(High Voltage Differential and Low Voltage Differential) . HVD
uses 15V while LVD uses 3.3V, so connecting an HVD device to an
LVD host bus adaptor can blow the line drivers on the HBA,
likewise an HVD HBA connected to an LVD device.</p>
<p style="margin: 0.5em 0px; line-height: 22.3999996185303px;
color: rgb(37, 37, 37); font-family: sans-serif; font-size:
14px; font-style: normal; font-variant: normal; font-weight:
normal; letter-spacing: normal; orphans: auto; text-align:
start; text-indent: 0px; text-transform: none; white-space:
normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width:
0px; background-color: rgb(255, 255, 255);">Similarly,
connecting a (slow) SE single-ended device onto a (fast) LVD
SCSI chain will cause the HBA to sync down to the lowest speed.</p>
<p style="margin: 0.5em 0px; line-height: 22.3999996185303px;
color: rgb(37, 37, 37); font-family: sans-serif; font-size:
14px; font-style: normal; font-variant: normal; font-weight:
normal; letter-spacing: normal; orphans: auto; text-align:
start; text-indent: 0px; text-transform: none; white-space:
normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width:
0px; background-color: rgb(255, 255, 255);">While
interconnectivity of a number of devices may look
straightforward, there are many pitfalls, and with older SE
devices the cabling length becomes an issue as signal degrades.</p>
</blockquote>
<br>
<br>
-Adam<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 07/03/2015 04:17 PM, Adam Thompson
wrote:<br>
</div>
<blockquote
cite="mid:F49BA31F-2757-418C-93D4-3AFDEE5E476E@athompso.net"
type="cite">Not 100% sure either, but IIRC LVDS (and just plain
differential) never had its own connector.<br>
With the advent of ... Ultra160??? everything was lvds anyway.<br>
I recall a small handful of devices that could do differential or
regular based on a jumper or dip switch, over the same connector.<br>
What's the device?<br>
-Adam<br>
<br>
<div class="gmail_quote">On July 3, 2015 4:06:19 PM CDT, Trevor
Cordes <a class="moz-txt-link-rfc2396E" href="mailto:trevor@tecnopolis.ca"><trevor@tecnopolis.ca></a> wrote:
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<pre class="k9mail">I have an external SCSI device that I'd like to plug in on a 10-15' cable.
The device has a standard dense 50-pin 2-row connector. I thought at
first that meant for sure LVD, but now I'm thinking it just means ultra.
I need LVD to get over 1.5M cable length, according to spec. LVD lets me
go to 12M it appears. If it's just ultra then I'm SOL, I guess.
Is there a way to know what signalling this device uses based just on the
connector? I checked all available interent specs, incl the original
manual, for the device and *nothing* specifies anything other than "SCSI".
I'm a big SCSI guy, but my memory on the subject is starting to get
hazy due to disuse...
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