> when i look in to SMART tab, i did find a yellow warning on reallocated ..
> Would not the hard disk itself would move the bad sectors in to some place in the total space.
The hard disk itself moved the data to the spare area and then all further reads/writes re-directed to this spare area.
Ideally, then you'd NOT see any problems. This is the purpose of the spare area and "bad sectors": to prevent the use of the original sectors and then the disk should seem "perfect".
> how to locate those bad sectors.
There is no need to locate those bad sectors. Those are no longer used, those never cause any more problems as all reads/writes of the original bad sectors are automatically redirected to the spare area instead.
Before posting similar, I'd recommend to check numerous topics which cover this exactly:
(or if you click on the "?" next to text description, you can immediately read about "bad sectors" in the Help)
> if i resort to chkdsk , then i have to wait a wahole day, or more to scan
It is described numerous times WHY
- chkdsk *never* finds and repairs problems with the disk drive (even if sounds surprising) but checks only the partition.
So it can show perfect status on almost failing drive (and even vice versa).
If you'd search this forum, you'd find lots of topics:
and there may be others .....
>What should i do in this case.
Please check the suggested page in Support -> Frequently Asked Questions -> How to repair hard disk drive? How to eliminate displayed hard disk problems?
As you can see, it does not recommend chkdsk at all, but recommends real, proper disk testing which is sensitive enough for problems and can reveal and stabilize the issues - before attempting to clear the error counters.
> i tried your solution to change the 0000000 to -8, but the scan result does not change from yellow exclamation.
Changing 0000000 to -8 does not have any effect of course.
To clear the error counters, please (on the S.M.A.R.T. page of the disk drive)
Locate the attribute(s) where you see the yellow exclamation mark. If I'm correct, this is the "5 Reallocated sectors count".
If you select that, you can see the actual number of problems (eg. 984 in this case) on the bottom graph, below the list.
Click on the 0 between the + and - in the Offset column. After the small confirmation dialog, specify -984
(number of errors with negative sign) in the small window.
Soon the health would improve and the problems will disappear from the text description.
Please note that you may need to do similarly (just with other value) for other attribute(s), for example 196 Reallocation Event Count too.
I do not see the real value there, but if you use Report menu -> Send test report to developer option, I can check the proper numbers and assist step-by-step about how the restore the health to 100%, how to clear the bad sectors, how to prevent them from displaying - and this way how to focus on possible new problems, degradations (if there will be).