SATA drive not showing on my computer

PC specifications are:
Mobo: Intel 945gnt
Processor: Intel Pentium D 820
RAM: 1gb
Video card: nvidia 8600gt 1gb
hard drive: 1 sata 80gb, 1 ide 40gb

my sister used the computer in the morning, and when i turned on the pc this evening, the sata drive isnt showing up, this does not happen always, its the first one... i looked into the bios and the sata drive isnt showin there, my xp is installed in the ide so i can boot normally, but the sata is my problem... can anyone please help?

 

So the sata-drive did work/show up earlier?
Have you checked the sata-cable, could be disconnected/broken?

 

how can it be broken? im not doing anything inside the case since at least 2 months...

 

Could be disconnected, bent too much etc.

If the drive doesnt show up in BIOS, but it used to, then it's pretty much 100% sure that the problem is inside the case. Eiter the drive is broken or the cable is not working.

 

ok... i will do that tomorrow morning... thanks for the response... ill be back with the results

 

thank you very much... the hard drive is now working, i changed the sata cord... thank you very much