Effects of unbalanced mdisk groups
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I found this in the Aussie Storage Blog
Rebalancing of managed disk groups has to be done whenever you add new mdisks to a group - otherwise the IOPS and response
More informations about unbalanced mdisk groups here
in this picture you can see that most of the IO is handeld by only one managed disk.
This is how it is looking like in performance view. The green lines are IOPS from the