You have installed Pisi Linux 1.2, and Dolphin detects not your other Partition in Pisi Linux 1.2.
Here i post a solution for you, for the first.
We work on this issue.
For the first open a Terminal and type:
You should see the other partition of your hardisk.
Now can you mount your other Partition with the command
sudo mount / dev / sdax / mnt
Replace the x for your partition number, as example i will mount sda6, also must i type sudo mount / dev / sda6 / mnt
after that you can open Dolphin and click on your partition to view it or other things