I have a Lenovo U310 that has a 32GB SSD cache with the 500GB HDD. My windows did not shut down properly and upon reboot, it went to Reading Packed Metadata into memory... then it reboots again. F2 and F12 does nothing. In fact, I tried all the Fn keys
After many reboots I get "Failed to read packed metadata" then "there was an error initializing cache. Proceeding without it"
Then it shows
RAID VOLUME
0 FFS RAID0(stripe) 128KB 8GB Normal
1 CACHE RAID(cache) 128KB 21GB DISABLED
PHYSCIAL DEVICES
0 Samsung.........29GB CACHE DISK (0,1)
1 ST500 ...... 465GB DISABLED
Then it asks me to press Ctrl-I, which bring me to the Intel main menu.which shows:
RAID VOLUMES
none defined
PHYSICAL DEVICES
0 Samsung ..... 29GB INCOMPATIBLE
1 ST500 465GB INCOMPATBILE
Any way to recover? How can I get access to my main drive because there are files that I want to copy 
Even the system restore button on Lenovo doesn't work.