The High Availability tests you are describing can be conducted, but be aware of the following.
You can pull 2 drives at the same time as you are running 2.1 code which has triple parity RAID enabled. This also means that you should be able to pull a third drive without data loss. Although this is true, the system will then decide to do a gracefull shutdown as it expects other problems to happen and wants to protect the (still) good data on the drives. You need to call support to get out of this situation.
You can also remove SSD's out of the array as long as there is still one SSD in the system you should be fine.
Pulling the SAS cable can force a failover, depending if you pull an active cable or passive.