Github user mike-tutkowski commented on the issue:
https://github.com/apache/cloudstack/pull/1642
I have been performing additional tests manually on this PR and noticed one
issue that I want to investigate:
When I put the managed primary storage that the system VMs are running on
into maintenance mode, the three system VMs were moved to my NFS primary
storage (so far, so good).
However, the SRs and SAN volumes that stored the root disks of each of
these system VMs were not cleaned up (I had to do so manually).
Also, when I tried to delete the managed primary storage later, it said
there were associated volumes, so I had to force delete the primary storage.
I want to investigate why those resources weren't cleaned up automatically.
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