Dagens Spørsmål & Svar-sesjon kommer til oss med høflighet av SuperUser-en underavdeling av Stack Exchange, en fellesskapsdrevet gruppering av Q & A-nettsteder.
Foto courtesy of Scott Schiller (Flickr).
Spørsmålet
SuperUser leser Chris ønsker å vite om en harddisk husker dårlige sektorer etter formatering:
On an NTFS-formatted hard drive with some bad sectors, does the hard drive still remember those bad sectors after Windows diskpart clean is used to remove the NTFS volume? What if clean all is used?
Har en harddisk husket dårlige sektorer etter formatering?
Svaret
SuperUser bidragsytere Ben N og hard har svaret for oss. Først opp, Ben N:
NTFS remembers bad clusters. A cluster is considered bad if any sector in it is not accessible. Since the bad cluster information is stored in a specific file ($BadClus), that information will be destroyed if the NTFS volume is removed. clean and clean all are essentially the same in that regard. clean all does a more thorough job of destroying the disk’s data while clean just wipes the partition table.
Further Reading: NTFS System (Metadata) Files
The hard drive is what remembers bad sectors. Exactly how it does that depends on the model, but most modern hard drives automatically detect and remap dead sectors so that the operating system does not even know there is a problem. In that case, nothing the operating system does can affect the disk’s internal bookkeeping.
Etterfulgt av svaret fra tøffe:
If the operating system is encountering bad sectors, then the hard drive’s internal bad block table is probably full (as Ben N pointed out) and it is time to retire the hard drive. Hard drives typically do not stop failing.
Har du noe å legge til forklaringen? Lyder av i kommentarene. Vil du lese flere svar fra andre tech-savvy Stack Exchange-brukere? Sjekk ut hele diskusjonstråden her.
