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<p class="MsoNormal"><span style="font-size:11.0pt">I have a question about mmvdisk and mmchdisk.<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">We have some data on a bunch of vdisks which were migrated from legacy to mmvdisk commands.<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">We need to move the data off those vdisks to another storage system.<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">Our plan was:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Create a new pool on with the vdisks on the new storage system<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Change the default placement policy to point to the new pool<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Use MIGRATE policy to move file-sets over to the new vdisks in the new pool<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">How do we then go about stopping the old vdisks and checking the data is all off them? Is using mmchdisk safe to use with vdisks, or is there some equivalent mmvdisk command we should be using?<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">I’m thinking maybe what we do is add a temporary vdisk on the new system in the same pool as the older one thought with a different failure group, and then empty the disks in classical style before deleting
them.<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">Why … (before someone asks), the older system is a hybrid SSD+HDD model and we want to add shelves to it. And online expansion isn’t supported/requires recabling as well. So we move all the data to the new
system, and then we want to *<b>selectively</b>* move data back to the older one - not all though … hence the new pools.<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">I’m assuming also we can remove/delete vdisks from a vdiskset from specific recovery groups. The migration from legacy mode looks to have bunched disks across different RGs into the same vdiskset even though
they have different failure groups applied to them.<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">Thanks<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">Simon<o:p></o:p></span></p>
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