EDIT: Look at the checkmarked answer comments to get your issue solved.
Whenever I try to start the SQLD service I get MySQL Daemon Failed to Start. I infact tried
I had the same issue happening. When I checked the error.log I found that my disk was full.
Use:
df -h
on the command line. it will tell you how much space you have left. mine was full. found my error.log file was 4.77GB. I downloaded it and then deleted it. Then I used service mysqld start and it worked.