Customer all new buy SSD Disk container status is "shared"

[BenLin]

My customer have tiers function . Now have 2 SSD pool. This month him new buy SSD(1.2t) Diskx12 want to add capacity on old SSD pool. But when him use system manage in Storage pool\ add Disk .He get a message "no disk ". He return to check Disk status，The all SSD container is "shared". I ask customer what to do before .He first just assigned SSD disk.and SSD before container is "unassigned".
My question is
1. "How to reassign to SSD pool?"
2. how to use shared status?its mean root data is APD status.
Can i to use add flex vol capactiy ?
Because customer need to extend some flexvol capacity.
thanks

[SpindleNinja · Accepted solution]

1 - to reassign a part of a pool (A storage pool devdes the disks in to 4 equal partitions you have to destroy the aggr that is associated with that set of partitions.  If you want to delete the whole pool, you have to clear out any aggr that is associated with that pool, then you can delete the storage pool.

2.  Yes shared me it's a partitioned disk,  but in the case with storage pool, it's 4 equal parts, not a Root-Data-Data type configuration.   

3. Storagepools  do not  add any capacity to the flexvol.   It is just a cache mechanism for the aggr.