Thanks for the reply!
So this SSD is shared among several aggrgates. Is this information about what aggregatea it shared with in diskSharedInfo
DiskSharedInfo diskSharedInfo = raidInfo.getDiskSharedInfo();
List<SharedAggregateInfo> aggregateList = diskSharedInfo.getAggregateList();
another question is what is this different from SSD in the storage pook, then be shared by aggregates?