That's where you can run the diagnostics, such as chkdsk. You could also do a reformat, but it would only be by actually running the command "format" or "fdisk." It doesn't run without issuing the command.
You must be confused. There is no such thing as command mode on a PC. What you are probably referring to is the “command prompt”. And, again, your confusion is obvious, you might be referring to the repair console when stating that a recovery CD boots to a command prompt.
I saw your smart azz post about me, you should really make sure your azz can cash your mouth’s checks before you write them.