Anyone please give me advice what to do...

I use western digital hdd 80gb as primary master where the os been installed. when i boot my pc, S.M.A.R.T hdd diag appear status of my primary master is "Bad, Backup & need a replace" something like that... and press f4 to continue.. is my problem really need to replace the hdd or there is other way to solve it? and what S.M.A.R.T Hdd diag deal for? I currently use dual boot inside the hdd Vista & xp. so it's really make me to choose other method rather that replace the hdd. All my work at the hdd. the major symtom appear after press the f4 button xp won't startup n vista take about 30min to startup normally . After vista ready to use, program such as adobe & office sluggish my pc performance. is this due to my bad hdd? Plzz.. someone help me...

S.M.A.R.T. = Self-Monitoring, Analysis, and Reporting Technology
http://en.wikipedia.org/wiki/S.M.A.R.T.

If you're getting a S.M.A.R.T. warning at bootup, take heed of it.

Test the hard disk with the manufacturers analysis tool;

http://www.tacktech.com/display.cfm?ttid=287#wdc

And, any info on that hard drive that you want, back it up to another drive as the warning says, or you are probably going to lose it.

Thanks a lot... Its very usefull Info u gave me... i used HDtune to investigate the problem... the result "01 - Read Error Rate - Indicates the rate of hardware read errors that occurred when reading data from a disk surface. A non-zero value indicates a problem with either the disk surface or read/write heads." it's very old hdd to. So i've got no choice, just flush my wallet at the shop 4 brand new 1 hdd.haha...

Thanks again...

You're welcome.