There will be no problem with the cache. It is impossible for a hdd to operate without cache, so it must be that the system is misreading or something. Just ignore it. Get your SSD, put you os on it, you'll be fine.
+
+
'''UPDATE'''
+
The cache is part of the SSHD. Once you remove the SSHD, the cache goes with it. No proplem between anything.
There will be no problem with the cache. It is impossible for a hdd to operate without cache, so it must be that the system is misreading or something. Just ignore it. Get your SSD, put you os on it, you'll be fine.