I had the same problem with a Dell/STEC 16GB SSD
from hardware hacking and shutting down the hard (aka dumb) way -- pulled AC power with no battery in the mini -- aaaargh! As SSDs need a little time to write the latest changes to disk, these were lost and the filesystem corrupt. I thought the SSD
was dying, but after repartitioning, reformatting, and restoring a backup it has served me well since => EBKAC
Does the reformatting you did include a fresh partition table? If not, there may be still hope.