Hard drive problem?

Users questions:My hard disk is 40G, sub-CDEF4 district yesterday, only the C boot drive letter and CD-ROM drive letter, and the C drive becomes the size of 40G, DEF plate no, my EF disc important information, I ask What is the reason , how to solve? Thank you!
Experts answer: is a hard disk partition information is lost, can beYour hard drive could have spent a long time, lack of timely maintenance and lead to hard disk bad sectors, although the hard disk partition not found, but the hard disk can use. Proposes to hang on your hard drive on another computer as a slave to Start. then back up your important data to another hard drive (this is comparatively safer!). then youHard disk, hard drive self test, if the progress bar stops at a fixed location, it shows from here is the bad sectors, according to the size of the hard disk to determine the areas where the hard disk bad sectors into the area separately formatted as a single partition, This can protect your hard drive, to extend the service life.
  • This information provided by the users.Thanks!