storageCapacityReservationGib

Specifies the amount of storage in gibibytes (GiB) to reserve from the parent volume. Setting StorageCapacityReservationGiB guarantees that the specified amount of storage space on the parent volume will always be available for the volume. You can't reserve more storage than the parent volume has. To not specify a storage capacity reservation, set this to 0 or -1. For more information, see Volume properties in the Amazon FSx for OpenZFS User Guide.