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<p>Ah, cool. Thanks for the clarification.</p>
<p>I have worked with SCSI based technology for most of my 30 year
IT career. But, I had not used SmartMonTools until recently.
Typical in enterprise monitoring solutions, the hardware status
(reporting) is layered, filtered, or otherwise presented via
vendor specific vendor agents, SNMP, etc., so you don't usually
get to the (raw) registers, attributes or low-level state
information. After all, when you are monitoring 100K servers
world wide, and 1 disk in a RAID 5 configuration goes from Green
to Red, and the Hot Spare spins up, for example, you never worry
about the specific cause (even if it is a false positive), you
just schedule the suspect drive for replacement, by local on-site
support, right?</p>
<p>I remember one situation years ago, where a recent disk firmware
update caused 10s of drives on 1000s servers, marked good drives,
as in a potential failure state, it was a software bug, that got
through vendor code QA/QC. The chaos and confusion it caused, was
frankly, nuts, and vendor definitely had egg on face for that one!<br>
</p>
<p>-DD<br>
</p>
<div class="moz-cite-prefix">On 3/16/2022 23:45, Claudio Kuenzler
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAF-yqgiPRZSbFuk=LK1=4icz7j0KRQfnLh6dYQEQC__jQG1SQA@mail.gmail.com">
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<div dir="ltr" class="gmail_attr">On Thu, Mar 17, 2022 at 7:36
AM Schorschi Decker <<a href="mailto:schorschi@dc.rr.com"
moz-do-not-send="true" class="moz-txt-link-freetext">schorschi@dc.rr.com</a>>
wrote:<br>
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0.8ex;border-left:1px solid
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<p>I asked the question... because nothing typically
reported was reported. Not even status determined by
attribute scan. This is the first time I have ever seen
SmartMonTools not report results in sufficient detail to
be clear on how the result was achieved, hence the
question.</p>
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<div><br>
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<div>Fair question. The smartctl output might look weird when
you're used to ATA devices and their SMART attributes. But
if you've worked with SCSI disks a while ago, this is kind
of normal behaviour. <br>
</div>
<div>How exactly the Health of the drive is assessed, I can't
tell you. But the health status (mostly) works. See <a
href="https://www.claudiokuenzler.com/blog/411/check_smart-saves-server-lifes-defect-hard-drive-detected"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.claudiokuenzler.com/blog/411/check_smart-saves-server-lifes-defect-hard-drive-detected</a>
for such a case. You can also see the "Elements in grown
defect list" on this article as these were all SCSI drives.<br>
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0.8ex;border-left:1px solid
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<p>Moreover, the comment 'Never assume 100% accuracy on
the reported data though' is what? Is that a blanket
disclaimer or a comment specific to IDE device status
determination?<br>
</p>
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<div>That is a general disclaimer :-). The data retrieved and
shown by SMART should be used as helpful indicator. But
never fully rely on it. A disk not indicating any errors in
any attribute can still fail out of the blue.<br>
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