Originally Posted by xms
p.s if you mean only about sdX name is wrong sure i will replace it with real name;
else i didn't understand clear what did you mean..
sd<anything> is the name of a device holding a file system - I.E: The filesystem layer above whatever the storage layer happens to be.
mmc<anything> is the name of an underlying storage layer.
The mmc<whateve>.image file is a copy of what is recorded on the bare storage media.
Under Linux, you can use the loop dev. to mount that image file, allowing you to access the file system that it represents.