I thought I had a handle on parity groups, but after looking at my AMS2100 array, I find myself confused.
I've found precious little documentation on parity groups, but I thought that having multiple parity groups allowed for your data to be spread out across multiple identical RAID groups.
I thought that part of the purpose was to make use of the larger spindle count to increase performance, as well as spreading the load across the ports and controllers.
In my particular case, I created a RAID1+0(4D+4D) group with 3 parity groups.
When I look at the properties of the drives assigned to the RAID group, it shows 8 of the drives with a normal status and 16 drives with a standby status.
By contrast, my HUS110 is also set up with 3 parity groups, but in a RAID6(6D+2P) configuration. On that array, all 24 drives show a normal status.
What am I missing?