I have 2 hard disk 1st one 150gb(one with OS) and 2nd 500 gb.Today morning i just removed my cdrom to use on my freinds pc when ii installed it back.My pc was taking loong time to start also my 2nd hard disk 500gb was missing.Then i just checked all connection and fitted all wires properly and when i booted again it showed 2 windows xp instead of one and when i choosed 1st one it gave some missing .sys file error and when i choosed 2nd one it said unable to read from hard disk error. Also when i decided to boot from cdrom and reinstall OS it gets stuck on line detecting 47678767 on 1d bus atapi... something like this. Can any1 help me with installing 2nd hard disk bec it had all files and also all my games. Windows seem to load normally if i connect only 150gb hard disk but when i connect other 1 also it gives problem. I am using segate sata harddisk.