To find out total space and available space for the aggregates:
example1:
lab> df -mA
Aggregate total used avail capacity
aggr2 342MB 0MB 341MB 0%
aggr2/.snapshot 18MB 0MB 18MB 0%
aggr1 684MB 151MB 532MB 22%
aggr1/.snapshot 36MB 0MB 36MB 0%
aggr0 256MB 244MB 12MB 95%
aggr0/.snapshot 13MB 8MB 4MB 64%
lab>
example2
Prod01> df -mA
Aggregate total used avail capacity
aggr_db 2080486MB 1722357MB 358128MB 83%
aggr_db/.snapshot 0MB 0MB 0MB ---%
aggr_jrnl 2447631MB 1841889MB 605741MB 75%
aggr_jrnl/.snapshot 0MB 0MB 0MB ---%
aggr_logs 1223815MB 1082705MB 141109MB 88%
aggr_logs/.snapshot 0MB 0MB 0MB ---%
Prod01>