recently i returned from a vacation of one month and turned on my pc w/ 2 hard drives. it goes to the hp invent screen and gets stuck. one hard disk keeps on making a scratching noise since start up and both disks are not detected but when i remove the disk making the noise my other disk is recognised...my brother tells me its dead but there are lots of important files in it..is my hard disk really dead?? if not can it be repaired??