You might have "fun" with the data having been stored in big endian and little endian format (Sparc vs. Intel), so if once you have mounted the disk the file names and or file contents look scrambled then that could be why.

See: Endianness - Wikipedia, the free encyclopedia and Dr. Bill's Notes on "Little Endian" vs. "Big Endian".

The problem can be resolved with some C code though.