In C-mode, you can find the minimum needed hot spare for a node:
dataontap-vsim-cluster::storage raid-options> show -name raid.min_spare_count
Node Option Value Constraint
-------- ------------------------------------- ------------ -----------
dataontap-vsim-cm1
raid.min_spare_count 1 only_one
dataontap-vsim-cm2
raid.min_spare_count 1 only_one
2 entries were displayed.
Does 7-mode also supports this raid.min_spare_count option?