I am using HD clips from an EHD in Final Cut Pro X.

Question

Upon importing one clip to Final Cut pro, should there be 4 clips on the EHD in the Final Cut Events Folder that look like the following?
2011-09-23 19_27_42 (id)  GET INFO says,"EHD/Final Cut Events/Analysis Files/Stabilization
2011-09-23 19_27_42 (id).cbal  GET INFO says,"EHD/Final Cut Events/Analysis Files/Color Adjustment Files
2011-09-23 19_27_42 (id).mov GET INFO says,"EHD/Final Cut Events/Original Media
2011-09-23 19_27_42 (id).mov  GET INFO says,"EHD/Final Cut Events/Transcoded Media/High Quality Media
What about in Final Cut itself?  I have clips in the Event Library that look like both of these below.
2011-09-23 19_27_42
2011-09-23  18;55;49
I am asking this question because I have merged too different events taken of the same event on the same day with two different cameras, and when I do that I get problems with missing red clips with a yellow triangle and exclamation mark ! 
Even if they aren't related, if someone could explain the reason for the four types of different clips above I would appreciate it.  I realize it could be as simple as "that's what is produced on the EHD when you import clips and select the Analysis files for Color Stabilization, etc.
Thanks, Tracy

Answer 1

Since I have an 8TB Pegasus EHD that is rapidly filling up to the point that its almost full, there shouldn't be any problem to go ahead and delete the Original Media Folder after I have an Optimized Folder for that same footage is that correct?
I can now use this "Optimized folder" to produce films in the Project LIbrary with music, transitions, titles, etc.?
If I wanted to be redundant ( Engineering (of a component) not strictly necessary to functioning but included in case of failure in another component) I could put all my "Original Media Folders" on a different EHD in case I had EHD failure. Do you agree?
I couldn't resist putting the definition in parentheses because I couldn't believe how perfectly it fit!!