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<p class="MsoNormal"><span style="font-size:11.0pt">See following sections in lustre manual :<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">18.2. Backing Up and Restoring an MDT or OST (ldiskfs Device Level)<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">18.3. Backing Up an OST or MDT (Backend File System Level)<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Alex.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">lustre-discuss <lustre-discuss-bounces@lists.lustre.org> on behalf of Lana Deere <lana.deere@gmail.com><br>
<b>Date: </b>Monday, December 9, 2024 at 14:14<br>
<b>To: </b>lustre-discuss@lists.lustre.org <lustre-discuss@lists.lustre.org><br>
<b>Subject: </b>[lustre-discuss] migrating mgs and mdt<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">I am managing a Lustre 2.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white">\u200a</span><span style="font-size:1.0pt;color:white">12.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white">\u200a</span><span style="font-size:1.0pt;color:white">6
system where I have just discovered that the MGS and MDTs are on single disks rather than RAIDed drives. /dev/sda5 on /mnt/lustre_mgs type lustre (ro,svname=MGS,nosvc,mgs,osd=osd-ldiskfs,.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white">\u200a</span><span style="font-size:1.0pt;color:white">.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white">\u200a</span><span style="font-size:1.0pt;color:white">.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white">\u200a</span><span style="font-size:1.0pt;color:white">)
/dev/sdc1 on /mnt/lustre_mdt_abc<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I am managing a Lustre 2.12.6 system where I have just discovered that the MGS and MDTs are on single disks rather than RAIDed drives.<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">/dev/sda5 on /mnt/lustre_mgs type lustre (ro,svname=MGS,nosvc,mgs,osd=osd-ldiskfs,...)<br>
/dev/sdc1 on /mnt/lustre_mdt_abc type lustre (ro,svname=lstr_abc-MDT0000,mgsnode=10.58.255.254@o2ib,osd=osd-ldiskfs,...)<br>
/dev/sdb1 on /mnt/lustre_mdt_def type lustre (ro,svname=lstr_def-MDT0000,mgsnode=10.58.255.254@o2ib,osd=osd-ldiskfs,...)</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Is there any way to migrate those three metadata partitions to other partitions which would presumably be located on RAIDed drives? For example, would it work to set up the new RAIDed drives and use dd to clone the partitions into partitions
on the RAID?<br>
<br>
.. Lana (<a href="mailto:lana.deere@gmail.com">lana.deere@gmail.com</a>)<o:p></o:p></p>
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