The blogger Johnny Chadda offers a helping Ubuntu-hand to those who have dificulties when they have lost the good old c: d: -naming of their disks.
Read it here
If you happen to use a Microsoft operating system you are most likely to be familiar with finding your partitions using drive letters, such as C: and D:. When you pop in your brand new Ubuntu CD and start the installation, you will notice that there are no C and D drives, but instead lots of letter and number combinations. Do you feel lost? Lets work it out.