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Hi Christian,<br>
Thank you for the very informative response. Really appreciate
it. The old SMART tests were easier to read and, I think, more
useful.<br>
<br>
<div class="moz-signature">Thane K. Sherrington<br>
<br>
Computer Connection, Ltd. ...taking the mystery out of computers
since 1982.<br>
Winner of the 2012 Ian Spencer - Excellence in Business Award<br>
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2016, 2017, 2018 and 2019!</b><br>
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<a class="moz-txt-link-abbreviated" href="mailto:thane@computerconnectionltd.com">thane@computerconnectionltd.com</a></div>
<div class="moz-cite-prefix">On 21-Dec-2022 10:59 a.m., Christian
Franke wrote:<br>
</div>
<blockquote type="cite" cite="mid:bdc2e33f-d5b0-67cc-3561-3637e9041d78@t-online.de">Thane
K. Sherrington wrote:
<br>
<blockquote type="cite">Hi all,
<br>
Looking at NVME logs, I find them hard to understand.
<br>
<br>
Take the following logs (questions inline).
<br>
<br>
smartctl pre-7.4 2022-07-17 r5397
[i686-w64-mingw32-w11-21H2(64)] (CircleCI)
<br>
...
<br>
=== START OF SMART DATA SECTION ===
<br>
**>>>>>>>>>>>>> *SMART
overall-health self-assessment test result: PASSED - I assume
this is good, but a perfect indicator, since I've seen regular
drives say the passed SMART but had read errors.*
<br>
</blockquote>
<br>
This message only exists for consistency with ATA and SCSI output.
It prints PASSED if and only if the "Critical Warning" byte from
SMART/Health info is zero.
<br>
<br>
Since the early days of ATA SMART, read errors do not imply that
SMART failure is reported.
<br>
<a class="moz-txt-link-freetext" href="https://www.smartmontools.org/wiki/FAQ#ATAdriveisfailingself-testsbutSMARThealthstatusisPASSED.Whatsgoingon">https://www.smartmontools.org/wiki/FAQ#ATAdriveisfailingself-testsbutSMARThealthstatusisPASSED.Whatsgoingon</a>
<br>
<br>
<br>
<blockquote type="cite">...
<br>
SMART/Health Information (NVMe Log 0x02)
<br>
</blockquote>
<br>
For details about this log, see for example "Figure 207" from "NVM
Express Base Specification, revision 2.0b":
<br>
<a class="moz-txt-link-freetext" href="https://nvmexpress.org/developers/nvme-specification/">https://nvmexpress.org/developers/nvme-specification/</a>
<br>
<br>
<br>
<blockquote type="cite">Critical Warning: 0x00
<br>
</blockquote>
<br>
Bit 0 of this byte would be set if "the available spare capacity
has fallen below the threshold.". Then "FAILED!" would be printed
above. See spec for more bits.
<br>
<br>
<br>
<blockquote type="cite">*>>>>>>>>>>>>>
Temperature: 79 Celsius - This seems high
- is that a problem?*
<br>
</blockquote>
<br>
Possibly. If this persists, I would suggest to add more cooling.
<br>
<br>
<br>
<blockquote type="cite">**>>>>>>>>>>>>>
*Available Spare: 100% - This looks like 100%
of the spare is free. I assume that's a good sign?*
<br>
</blockquote>
<br>
Yes.
<br>
<br>
<br>
<blockquote type="cite">Available Spare Threshold: 10%
<br>
**>>>>>>>>>>>>>
*Percentage Used: 16% - Does this mean that
16% of the drive is used, or 16% of the spare space is used?*
<br>
</blockquote>
<br>
"Contains a vendor specific estimate of the percentage of NVM
subsystem life used based on the actual usage and the
manufacturer’s prediction of NVM life. ...".
<br>
See spec for full text.
<br>
<br>
<br>
<blockquote type="cite">*>>>>>>>>>>>>>
**Unsafe Shutdowns: 703 - Do unsafe shutdowns
matter? *
<br>
</blockquote>
<br>
This possibly indicates that the system was not properly shut down
frequently.
<br>
<br>
<br>
<blockquote type="cite">*>>>>>>>>>>>>>
**Error Information Log Entries: 3,470 - Is this a bad
thing?*
<br>
</blockquote>
<br>
Unknown. Experience shows that drive firmware of some vendors
increments this frequently.
<br>
<br>
<br>
<blockquote type="cite">Error Information (NVMe Log 0x01, 16 of 63
entries)
<br>
**>>>>>>>>>>>>> *No
Errors Logged - If there are 3470 log entries, why are no errors
logged?*
<br>
<br>
</blockquote>
<br>
"The controller should clear this log page by removing all entries
on power cycle and Controller Level Reset."
<br>
This differs from ATA error logs which are persistent.
<br>
<br>
Regards,
<br>
Christian
<br>
<br>
</blockquote>
<br>
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