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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Thanks – I haven’t tried this, but docs for mmadddisk say “</span>Only the system storage pool can contain
<span class="keyword">metadataOnly</span>, <span class="keyword">dataAndMetadata</span>, or
<span class="keyword">descOnly</span> disks.<span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">” actually.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Truong’s --force-nsd-mismatch option worked.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Luke<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">--
</span><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Luke Sudbery<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Architecture, Infrastructure and Systems<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Advanced Research Computing, IT Services<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Room 103, Computer Centre G5, Elms Road<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Please note I don’t work on Monday and work from home on Friday.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> gpfsug-discuss-bounces@spectrumscale.org <gpfsug-discuss-bounces@spectrumscale.org>
<b>On Behalf Of </b>janfrode@tanso.net<br>
<b>Sent:</b> 28 March 2019 18:33<br>
<b>To:</b> gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Subject:</b> Re: [gpfsug-discuss] Filesystem descriptor discs for GNR<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">There seems to be some changes or bug here.. But try usage=dataOnly pool=neverused failureGroup=xx.. and it should have the same function as long as you never place anything in this pool.<br>
<br>
<br>
-jf<o:p></o:p></p>
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<p class="MsoNormal">tor. 28. mar. 2019 kl. 18:43 skrev Luke Sudbery <<a href="mailto:L.R.Sudbery@bham.ac.uk">L.R.Sudbery@bham.ac.uk</a>>:<o:p></o:p></p>
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<p class="MsoNormal">We have a 2 site Lenovo DSS-G based filesystem, which with (some of the data) replicated across the 2 sites. We'd like to a 3rd filesystem descriptor disk so we can lose one site and still have filesystem descriptor quorum. But this seems
incompatible unless we make new vdisks - which we can't do on non native raid servers.<br>
<br>
We've added a new NSD which now has a free disc, but can't add that disk as descOnly.<br>
<br>
Adding the new descriptor disk to the system pool says:<br>
mmadddisk: A storage pool may not contain both vdisk NSDs and non-vdisk NSDs.<br>
<br>
Adding the new disk to a new system_desc pool says:<br>
mmadddisk: Disk usage descOnly is incompatible with storage pool system_desc.<br>
<br>
Tried adding config to specify the system_desc pool is for metadataOnly and it still says it's incompatible.<br>
<br>
There is no mention of descOnly disks here: <a href="https://www.ibm.com/support/knowledgecenter/en/SSFKCN_4.1.0/com.ibm.cluster.gpfs.v4r1.gpfs200.doc/bl1adv_planning.htm" target="_blank">
https://www.ibm.com/support/knowledgecenter/en/SSFKCN_4.1.0/com.ibm.cluster.gpfs.v4r1.gpfs200.doc/bl1adv_planning.htm</a><br>
<br>
Is it possible add a non-vdisk descOnly NSD to a dss-g/GNR solution?<br>
<br>
Cheers,<br>
<br>
Luke<br>
<br>
-- <br>
Luke Sudbery<br>
Architecture, Infrastructure and Systems<br>
Advanced Research Computing, IT Services<br>
Room 103, Computer Centre G5, Elms Road<br>
<br>
Please note I don't work on Monday and work from home on Friday.<br>
<br>
<br>
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