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<p>My personal experience with a number of UPSes that are monitored
via USB cable is that communications errors such as the ones
referenced in the issue you linked to below are a result of USB
hardware incompatibilities between the USB chipset and the USB
port on the motherboard.* This is NOT specific to the NUT project
as it affects both apcupsd and in fact, has been reported as an
issue with certain Windows systems and UPS brands.</p>
<p>The true reality here is that nobody can rely on a UPS for
reliable automated server shutdowns. If you need true reliability
you need a generator on a maintenance contract, and a UPS that
gets mandatory battery replacements every 3 years and the UPS's
purpose is only to carry the server while the generator spins up.</p>
<p>The only thing that monitoring a UPS is good for is REDUCING the
frequency of unexpected shutdowns that require an extensive fsck
on restart. In other words - if you aren't willing to pay the
money to REPLACE your Minuteman UPS with a model that is better
supported, and use serial port monitoring instead of USB
monitoring (since serial ports are more likely to not have
compatibility issues) then you aren't even in the class to even
start demanding you will have reliable shutdowns. What you are
going to get from NUT + your Minuteman UPS is all you can expect -
and it's going to be better than a completely unmonitored UPS so
take it and be happy with it. And, hedge your bets by using ext3
mounted with data=journal option, or use zfs and get familiar with
what zfs-scrub does and how to use it, and what zpool status does
and how to use it to repair a corrupt pool (AKA delete the file
that's corrupted) on a battery-backup hardware RAID card.<br>
</p>
<p>Ted<br>
</p>
<p>* Some people have found the insertion of a cheap USB hub in
between the UPS and the motherboard will fix USB communication
errors. YMMV<br>
</p>
<div class="moz-cite-prefix">On 12/14/2023 6:12 AM, Charles Lepple
via Nut-upsdev wrote:<br>
</div>
<blockquote type="cite"
cite="mid:98BD59E3-21B7-4319-A362-E126D4A4F01C@gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
I think the problem is that there were some communication errors,
as noted here: <a
href="https://github.com/networkupstools/nut/issues/555"
moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/networkupstools/nut/issues/555</a>
<div><br>
</div>
<div>I would want to test thoroughly before relying on it for
automated shutdowns.</div>
<div><br id="lineBreakAtBeginningOfMessage">
<div>
<div dir="auto" style="caret-color: rgb(0, 0, 0); color:
rgb(0, 0, 0); letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
text-decoration: none; word-wrap: break-word;
-webkit-nbsp-mode: space; line-break: after-white-space;">
<div>-- </div>
<div>Charles Lepple<br>
clepple@gmail</div>
</div>
</div>
<div><br>
<blockquote type="cite">
<div>On Dec 14, 2023, at 8:35 AM, Jim Klimov via Nut-upsdev
<a class="moz-txt-link-rfc2396E" href="mailto:nut-upsdev@alioth-lists.debian.net"><nut-upsdev@alioth-lists.debian.net></a> wrote:</div>
<br class="Apple-interchange-newline">
<div>
<div dir="ltr">
<div>That's MinutemAn and such a key word exists in
usbhid-ups subdriver tripplite-hid :)</div>
<div><br>
</div>
<div><br>
</div>
<div>Specifically, the "PRO RT 2U" series is among the
few mentioned by name:<br>
</div>
<div>````</div>
<div>$ git grep -i minuteman<br>
NEWS.adoc: * add Delta Minuteman UPS VID/PID [PR
#1230, issues #555 and #1227]<br>
drivers/tripplite-hid.c:/* Delta/Minuteman */<br>
drivers/tripplite-hid.c: /* Delta/Minuteman
Enterprise Plus E1500RM2U */<br>
drivers/tripplite-hid.c: /* Delta/Minuteman
PRO1500RT2U */</div>
<div>````<br>
</div>
<div><br>
</div>
<div> Oddly, it seems nobody posted it to neither HCL
nor DDL so far...<br>
</div>
<div><br>
</div>
<div>Hope this helps,</div>
<div>Jim Klimov</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Dec 14, 2023
at 1:08 PM James Parascand via Nut-upsdev <<a
href="mailto:nut-upsdev@alioth-lists.debian.net"
moz-do-not-send="true" class="moz-txt-link-freetext">nut-upsdev@alioth-lists.debian.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px
0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="ltr">I am wondering if there is a way to
have Nut Server monitor a Minutemen UPS.
<div><br>
</div>
<div><a
href="https://minutemanups.com/uninterruptible-power-supply/pro-rt2u-line-interactive-uninterruptible-power-supply/"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://minutemanups.com/uninterruptible-power-supply/pro-rt2u-line-interactive-uninterruptible-power-supply/</a><br>
</div>
<div><br>
</div>
<div>Thanks</div>
<div>James</div>
</div>
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</blockquote>
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