I would assume so as well, but I've seen more than one thread on the interwebs that have mentioned seeing drives show as undetected then it wouldn't boot.
Granted, they could have been doing something else wrong.
I guess the only way to know is to test. Shame I don't have more time to test thoroughly but I will see how it handles w/ SRT enabled then losing the SSD. I'm hoping the Raid 1 holds.
Edit: found my answer thanks to Anand:
if you disconnect your SSD cache or the SSD dies, your system will continue to function normally.http://www.anandtech.com/show/4329/inte ... g-review/2