AFF-A220 9.8P1 default aggregates and root volumes

Hello,

We're setting up a new and relatively small SSD NAS and it's arrived 
configured for two equally sized tiers with each node and its root 
aggr/vol in each tier. Each tier is about 15TB in size before compression.

We're hoping to avoid needing to manage two equally sized data aggrs and 
moving data volumes around to balance them. For one thing, our largest 
data volumes are larger than 15TB and snapmirror doesn't seem to want to 
let us set up a relationship to load the new volumes from our old 
cluster, even if the target has ample room after the guaranteed 3X 
compression.

We're willing to lose the wasted space involved in creating one 
tier/partition/aggr/root volume with the minimum number of disks for 
raid-dp (3?) for one node if that will allow us to put the rest on the 
other set and have a single large container for our unstructured file 
volumes.

We tried moving all volumes to one tier and deleting the other. But one 
node is still sitting on those disks.

Our old cluster is at 9.1P6 and I'm clear that some basic concepts have 
changed with the introduction of partitions and whatnot. So bear with me 
if I'm asking n00b questions even after a few years running NetApp gear.

  * Is what I've proposed above reasonable? (one minimum aggr and one
    large one) Is it commonly done? Is it a good idea?
  * Can you point me to any "change notes" type doc that explains these
    new terms/objects to an otherwise experienced NetApp admin?
  * If the above is viable, what do I need to do to get there?

For what it's worth, I've been noodling a bit with the "system node 
migrate-root" command  (this new AFF is not in production yet) and got a 
warning that my target disks don't have a spare root partition (I 
specified some of the disks on the "old" aggr). That warning says I can 
find available disks with the command "storage disk partition show 
-owner-node-name redacted-a -container-type spare -is-root true" but the 
CLI then complains that partition is not a command (I'm at "advanced" 
privilege level). Is the given command correct?

Hope to hear from you,


Randy in Seattle

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