배드섹터를 무료로 검사하고 복구해주는 프로그램을 발견했다.

https://github.com/TalAloni/HardDiskValidator

깃허프에 올라온 오픈소스 프로그램이다...

소스도 공개했고..무료로 사용이 가능하다. 

베드섹터를 고치는 방법은 배드섹터를 덮어쓰는 방법이라고 한다..

아래는 원문이다..

가장 빠른옵션은...2번째 옵션이라고 한다. 

그냥 배드섹터를 삭제해버리는건데..

3번째 옵션은 데이터도 살리는 방식이라고 한다..

근데 워낙 논리적 베드세거는 읽게되면 엄청 오래걸린다. 

그래서 그냥 삭제해버리기만 하는 옵션보다는 오래걸리는 모양이다..

여하튼 번거롭지 않게 원터치로 복원되고 오픈소스라니 놀라운 프로그램이다. 

개발자가 오래오래 잘살길 바라는 바이다...

단점 : 사용을 해보니 시간이 좀 오래걸린다...(3테라 기준으로 일주일은 걸리는것 같다..)

This simple utility was designed to help you find out if your hard drive has reached its end of life.

Q: What is a bad sector?

Hard drives write data in block units (sectors), every time a hard drive update a sector, it also updates a checksum (stored immediately after the sector data). When a sector is read from your hard drive, it's expected that the sector checksum will match the sector data, if that is not a case, the hard disk knows something went wrong during the write operation, that's called a bad sector.

Q: What causes bad sectors to happen?

Power failure during write is one common reason, hard drive malfunction is another common reason.

Q: Can I repair a bad sector?

Well, the data stored on the sector is invalid, but if your hard drive is functioning properly, you can overwrite the bad sector (and now it won't be "bad" anymore since the sector checksum will be updated as well).

This is my hard drive after wiping out a bad sector that was created during a power failure:

Q: Which test should I use?

If you're recovering from a power failure, then "Read + Wipe Damaged + Read" is the fastest way to wipe out the bad sectors and avoid any issue with software that does not respond well to bad sectors.
If something seems to be wrong with the drive, it's better to back up the data and use the "Write + Verify" test, which will erase all of the data on the disk.

Q: What's the difference between the tests?

• Read: Will scan the entire hard drive surface to find bad sectors.
• Read + Wipe Damaged + Read: Will scan the entire hard drive surface to find bad sectors, if bad sectors are found, they will be overwritten, and read again to make sure they were written successfully this time.
• Read + Write + Verify + Restore: The program will write a test pattern to the disk, verify the pattern was written successfully, and then restore the original data.
• Write + Verify: The program will write a test pattern to the disk and verify the pattern was written successfully. (the original data will be lost).
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