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Bad sectors I have bad sectors in mysamsung HDD. This was created when I tried to open a huge file and was impatient and tried to open other files in the cd simultaneously. Can these sectors be cleared? If yes kindly let me know how. I have tried Hutil and sutil and they are not usful.

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A hard drive contains platters that are magnetic media capable of having the magnetic state of areas on them changed and having this magnetic state retained/maintained. Data is held on a hard drive by representing it in binary form (1s an 0s). The way these 1s and 0s are physically represented on a drive's platter(s) is by having areas (spots) that are magnetically charged or not. The 1's are represented by charged (positive and negative) areas, the 0s are represented by uncharged areas (there is a level of tolerance by which an area is deemed charged or not). When a sector becomes "bad", or is deemed to be so, it is because areas within it no longer appear to be able to maintain a sufficiently magnetized (positive or negative) state (charge) to represent the 1's data in those areas. Bad sectors are marked (flagged) in a table and, when possible, remapped to one of series of spare sectors all hard drives have.

Now, sometimes an area is deemed (flagged) as bad when it may in fact not really be. Perhaps some oddity during the write process caused the spot to be too weakly charged (which really shouldn't happen or at least not often as that is a sign of another problem), rather than it being a case of the actual area on the media being bad in some way. Using the appropriate utility a sector previously marked as bad can be un-marked (taken off the bad list). And you can use one of these utilities to put a sector back in service (so to speak). Nothing is "fixed", just made available for use again as is.

However, if a sector really is bad, really can't be reliably, sufficiently charged or made to hold a charge, then it cannot be fixed by software such as HDD Regenerator seems to claim. The only fixing that might be possible would require a lab/factory. A truely bad sector has some form of damage, its physical properties have changed. Software can't undo this. About the only thing that could/can be done through software is to allow that area of data to be read (recovered) where it otherwise may not be by other software.

You can try the hdd manufactors zero write program. The fdisk and format the drive.
Then using a 98boot disk with scandisk on it, run scandisk /surface on the drive. And if all those bad cluster show up again. It is hdd replacement time.

By the way a note of caution, doing that will remove everything, I mean everything from that drive. It will be a 100% lose.

Another thing is go to www.grc.com and look at the SpinRite product.

Posted on Mar 29, 2008

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Let's try to explain the question that grinds us all when in cams about the hard disk. Can we actually repair a bad block? Before of the answer you must find some information about what is a hard disk, how does it work, what are bad blocks. After that you must identify them because you will need the exact location of the affected sectors. After you have done that you must run a few steps:
- before you try to resolve the problem with the bad sector you must extract the data that was written to that block. To do this you must run a Recovery program that you can find freeware on the net.
- bad sectors are unreadable parts on your hard disk but the nature of them must not be always physically and that part of the platens to be destroyed. The bad sectors can be simulated by some programs. This means that some programs installed on your computer can interrupt the reading process on to another segment of the platens. That is in the most happier cases but the chances that the bad sectors are cause by this is less then 10 percent. In this case is difficult to resolve the problem because even the Scandisk or other identification programs used to discover bad blocks will give a rapport that nothing is wrong with your hard disk. The best way is to uninstall the latest programs applied to the computer.
- lets supposed that you have a 20 gigabits partition on your hard disk that has bad blocks. After the identification program it will indicate you where are the blocks situated on the partition. So this way you can isolate them in to another partition that you must never use again. Another scenario can be created and the bad sectors can be at the beginning of the partition in the middle of it and at the end of the partition. Know it's a little bit tricky because you can't just go on and create three new partitions to eliminate the bad sectors from use. In this case most of the new hard disk has a spare space available just for this type of scenarios. You must access the CASH memory of the hard disk and indicates to the hard disk that instead of writing down on the effected blocks it must write to the spare blocks.
- another to restore the hard disk is to use the low level format option. Many of you think that low level format is a program. Wrong, the low level format option is set for any BIOS and can be easily use if you know some command line programming. The low level format can take to be complete a very long period of time but in the most cases we can obtain marvelous results. Actually the low level option takes every cluster of the hard disk and identifies them again (throw a thermal process) and writes down on the memory of the hard disk what sectors can be written and witch blocks are un-writable. This procedure is the best that can be because it will need no effort from your side to try and avoid the bad blocks that already exists and the hard disk itself know where the bad blocks are.
In conclusion the bad blocks can't be fixed. The problem is a permanent one and we can only try to use the hard disk until it is broken down for good. But if you are having financial problem this is a best way to keep going with your old hard disk.

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As you use your hard drive, it can develop bad sectors. Bad sectors slow down hard disk performance and sometimes make data writing (such as file saving) difficult, or even impossible. The Error Checking utility scans the hard drive for bad sectors, and scans for file system errors to see whether certain files or folders are misplaced.If you use your computer daily, you should run this utility once a week to help prevent data loss.

  1. Close all open files.
  2. Click Start, and then click My Computer.
  3. In the My Computer window, right-click the hard disk you want to search for bad sectors, and then click Properties.
  4. In the Properties dialog box, click the Tools tab.
  5. Click the Check Now button.
  6. In the Check Disk dialog box (called Error-checking in Windows 7), select the Scan for and attempt recovery of bad sectors check box, and then click Start.
  • If bad sectors are found, choose to fix them.
  • Tip: Only select the "Automatically fix file system errors" check box if you think that your disk contains bad sectors.

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