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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">My guess is … they decided it was unsafe. I’m sure I’ve seen a few release notes that have referred to mmfsck and data corruption.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">e.g.:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">https://www.ibm.com/support/pages/ibm-spectrum-scale-alert-all-supported-versions-may-be-affected-issue-online-mmfsck-which-may-result-file-system-corruption<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">So maybe it was classified as too dangerous to leave in the field?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">gpfsug-discuss-bounces@spectrumscale.org <gpfsug-discuss-bounces@spectrumscale.org> on behalf of Jonathan Buzzard <jonathan.buzzard@strath.ac.uk><br>
<b>Date: </b>Friday, 14 January 2022 at 14:38<br>
<b>To: </b>gpfsug-discuss@spectrumscale.org <gpfsug-discuss@spectrumscale.org><br>
<b>Subject: </b>Re: [gpfsug-discuss] [External] 5.1.2.2 changes<o:p></o:p></span></p>
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<p class="MsoNormal">On 13/01/2022 17:39, mark.bergman@uphs.upenn.edu wrote:<br>
[SNIP]<br>
> <br>
> The change that I noticed most was:<br>
> <br>
> Repair functionality of mmfsck command in online mode is deprecated<br>
> The repair functionality of mmfsck command in online mode is no longer available. The report-only operation still works in the online mode.<br>
> <br>
> While I know that mmfsck is rarely needed and has gotten much faster, deprecating the ability to do any online repairs seems<br>
> like a significant regression.<br>
> <br>
<br>
I would concur with that sentiment, and given it is a significant <br>
regression I would suggest that it IBM should give an explanation as to <br>
why functionality has been removed.<br>
<br>
Been able to do online repairs on large file systems is when you need it <br>
a complete life saver. It could be the difference between several days <br>
of outage vs. end users not realizing there was even a problem.<br>
<br>
<br>
JAB.<br>
<br>
-- <br>
Jonathan A. Buzzard Tel: +44141-5483420<br>
HPC System Administrator, ARCHIE-WeSt.<br>
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG<br>
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