Usually, you manage SSDs the same as HDDs, including firmware updates, scrubs, and zeroing. However, some Data ONTAP capabilities do not make sense for SSDs, and SSDs are not supported on all hardware models.
SSDs cannot be combined with HDDs within the same RAID group. When you replace an SSD in an aggregate, you must replace it with another SSD. Similarly, when you physically replace an SSD within a shelf, you must replace it with another SSD.