sorry guys, that single disk failure turned into a multi-disk failure and a rebuild of a different aggregate... all it back to normal (finally) except this problem. Anyway, here is the output from those commands:
snap reserve -A:
Aggregate aggr2: current snapshot reserve is 0% or 0 k-bytes.
snap list -A
Aggregate aggr2
working...
No snapshots exist.
snap delta -A
Aggregate aggr2
working...
snap delta: No snapshots exist in Aggregate aggr2
Also aggr show_space:
Aggregate 'aggr2'
Total space WAFL reserve Snap reserve Usable space BSR NVLOG A-SIS
10414513152KB 1041451312KB 0KB 9373061840KB 0KB 0KB
Space allocated to volumes in the aggregate
Volume Allocated Used Guarantee
SQL_DB_14 1349633820KB 83706340KB volume
SQL_DB_12 1349633820KB 651752992KB volume
SQL_DB_16 1349633820KB 504296272KB volume
SQL_DB_21 1199674504KB 718353544KB volume
SQL_DB_22 1199674504KB 443348312KB volume
SQL_DB_24 1679544308KB 508884544KB volume
SQL_DB_25 896241208KB 541405156KB volume
Aggregate Allocated Used Avail
Total space 9024035984KB 3451747160KB 348701220KB
Snap reserve 0KB 0KB 0KB
WAFL reserve 1041451312KB 95460992KB 945990320KB
The WAFL reserve allocated/available is what is puzzling me. Should it really be almost 1TB in size?