Depressing: Linux cannot be installed. The result is that the hard disk is damaged ~~~!

The last time I changed a hard drive of Seagate GB, I felt the speed was slow when I entered SuSE Linux today, and then I reported frequent errors when installing mandriva Linux. I thought it was a problem with the installation of the CD, but later I installed it, however, the hard disk cannot be mounted when SuSE is re-installed, and the hard disk sounds abnormal. It must be a bad track. Later, I tested seatools. Indeed, there were many bad channels at the end of the 20 GB ~~~~ Depressed. Fortunately, many fragments appear in pagefile. sys and Linux partitions.
I'm depressed. How can this happen? I have a GB hard drive of Seagate and haven't encountered such a problem for a long time. The 30 GB hard drive of Toshiba in the notebook has been downloading at BT, it takes less than 1 month for GB ~~~!!
Ah, I have to go to the dealer again, so I am very depressed ~~~~