I returned to my computer today to notice I had the following error:

(145, "Table './databasename/comments_freecomment' is marked as crashed and should be repaired")

Darn. The solution is quite easy, however:

mysqlcheck -uUsername -pPassword databasename comments_freecomment

Now you know what you already know, you can fix it:

mysqlcheck -r -uUsername -pPassword databasename comments_freecomment

If that doesn’t work, you can try a slightly different method. First, go to the location where your databases are stored on the disk (most likely something like /var/lib/mysql/databasename). Next, stop the database – and try to free up as much memory as possible. Then run:

myisamchk -r comments_freecomment

If that doesn’t work, try to force it:

myisamchk -r comments_freecomment -f

Hope that helps!