hard drive dump of Mobile Phone

Very few phones have a hard drive (when the term means a rotating magnetic media drive).

Phone storage is more typically solid-state Flash memory, than a hard drive.

In any case, on, e.g., S60 based phones you can access the file system with apps like FExplorer (http://www.gosymbian.com/).

Nokia PC Suite (http://www.nokia.com/pcsuite) also allows a [more limited] view to the storage space on the phone from a PC (via its Windows Explorer extension feature). It also has backup/restore functionality.

I dont' know of any tools specifically made for copying/dumping the storage areas (file systems in ROM or writable Flash) to a PC.