I partitioned my C drive into C and D partition. Never noticed the 100mb "System_DRV" before but, after some research on the matter, I learned that it is supposed to be there. It is located in front of my C partition (where I have Windows 7 Pro installed). It has no drive letter (and this too is how it's supposed to be) but, it has an asterisk in front of the name. This is how the label looks in AOMEI program:
*:System_DRV.
Usually an asterisk means something isn't saved. I don't know what it means in the AOMEI program. I am hoping I didn't screw something up in the partitioning.
Thanks for your help,