Check what you are dealing with. HDD is the slave drive of the second IDE, if present. Usually it is a CD or DVD, if present. Do you have a hard drive mounted as a slave on the second IDE?

Your partitions are hda1 hda2 hda3 etc. on your first (typically boot) hard drive. If you have a second hard drive it is usually hdb. the partitions on it are hdb1, etc. hdc is typically a cd or dvd possibly with write capabilities.