[comp.sys.misc] Bad files on a hard disk

CHEN@TAUNIVM.BITNET ("Chen S. Zucker") (12/22/88)

I am using a 30 Megabyte HD. I've been using this disk for about a year
now. Suddenly I encountered boot failures, some files are not loading, etc.

I checked the disk with Norton's DT.exe, and found that over 100 clusters
were bad; most of them had some files on them (with the message: DANGER NOW).

Is anyone familiar with a problem on 30 MB hard disks?
How does it happen, that all of a sudden files get disrupted, sectors, clusters
etc. become bad?
What should be the remedy? Do I have to reformat my hard disk?

I am using an ordinary PC clone, with 640 KB of memory, DOS ver. 3.20.

-Chen Zucker