✔ 最佳答案
Based on your information, it seems that your harddisk is damaged.
But you may not need to buy a new harddisk:
1. Harddisk usually have 1 - 3 years warranty
2. You can download format utilities (low level format utilities) from your harddisk manufacturer website. Implementing low level format on your harddisk can mark bad sector in your harddisk, so that damaged part in your harddisk will not be used by OS or any software.
If harddisk failed to perform low level format, that means you need to buy a new harddisk.
(low level format also called full format)
2007-07-22 15:45:38 補充:
But once a harddisk have bad sector, it's easy to have more and more bad sector. So if u can afford to buy a new one, it would be better.