When i try to add the "pool0 spare disks" with >aggr add aggr0 -d 0b.00.22 for example, like i did with the others i get following output:
storage1office> aggr add aggr0 -d 0b.00.22
aggr add: Starting a new raid_dp RAID group;
The number of disks specified must be at least three
times the number of plexes in the target aggregate 'aggr0'.
storage1office> Tue Feb 18 15:33:38 CET [storage1office:asup.post.drop:error]: AutoSupport message (HA Group Notification from storage1office (SHELF POWER INTERRUPTED) WARNING) for host (0) was not posted to NetApp. The system will drop the message.
It looks for me like it wants to create a new aggr instead of adding the disk to the existing aggr0... i cant explain why.
I don't know how many disks you want to add to aggr0, nor what the rg size is, but if you want to add one disk (as you showed in your example) to the existing raid group then specify the raid group you want to add it to (assuming there's room) with the switch "-g rg0", for example: "aggr add aggr0 -g rg0 -d 0a.00.22". If you want to add more than one disk, just specify the additional disk names after the first disk name (separated by a blank space).
"aggr status -v aggr0" will show you the raid group (most likely it's rg0) and the raid size (probably 16). If you need to increase the raid size to accomodate additional disks, then use "aggr options aggr0 raidsize n" (where n is the new raidsize number). Be careful and know for certain what you are doing: you can increase the raidsize, but you cannot decrease it.