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Dynamic Disks

When an uninformed admin sees an option to create a Basic vs a Dynamic Disk, which do you think he'll choose?  This is another situation where sounding cool probably isn't cool.  Dynamic Disks have some serious limitations that you should know about:

  • you can't use them as a mount point in a cluster
  • you can't use them in a cluster AT ALL if you want them to be cluster-aware (and you probably want this).  
  • they don't support disk Alignment

So, why do we have dynamic disks?  When you have to stripe LUNs to get a really huge volume, then you might consider a dynamic disk.  Even still, if you do this you can't dynamically grow your dynamic disk later, only a non-striped dd can do this.  

I would avoid them.  

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