Originally Posted by Trac
Thanks mrmazda, and you're right. I tried to view the contents using Ubuntu Live CD, but without a drive letter, I'm lost.
Sounds like you're a Linux novice too. Linux doesn't use drive letters. Linux "mounts" a partition to a directory (folder) name. The OS partition gets the root (/) directory, and everything else is a subdirectory of /, which means a directory can simply be a directory, or a name for a partition, and it can't run out of "names" (letters in M$-speak) for those who use a lot of HDs, USB sticks, OM devices, and/or partitions.
Next time you boot a Linux OM, use a file viewer to inspect the contents of /etc/fstab and/or /proc/mounts, and you'll see what directory names are given to the various mountable media that Linux mounted or expects to be able to mount. The partitions on the first HD will have a basename of /dev/sda, the second /dev/sdb, third /dev/sdc, etc., with a numeral or two appended designating where in the partition table the partition is located, such as /dev/sda1 for the first partition on the first HD and /dev/sdd7 for the "7th" partition on the 4th HD. In this naming scheme, USB partitions are treated as if they were HD partitions, and might get their letters and numbers before HD partitions.
All the above may sound complicated, but it really isn't once you get used to it, and in reality, you shouldn't necessarily need to care anyway as long as you know how to navigate with a file manager to locate directories and files of interest to you.
Regardless of naming scheme, a 2160 HD doesn't have a partition table, thus no partitions, and nothing that can be mounted for conventional access. DD is a program that can read from an unmounted device, with or without partitioning, and create files from the sectors it read, among its uses.