how do i repair the bad sectors on my Hard drive?

By foecum ·
I have a hard drive that indicates that it is failing. When ever i try to read data from it it gives me the error message cyclic redundancy check. What can i do to make this error go away

This conversation is currently closed to new comments.

Thread display: Collapse - | Expand +

All Answers

Collapse -

Chkdsk /f

by TheChas In reply to how do i repair the bad s ...

First, pick out and buy a new hard drive. You will need to replace your failing drive.
I would also buy 2 external USB adapters for the type of drive you have (IDE or SATA).

Using another computer, connect your existing hard drive to the USB adapter and run checkdsk with the /f switch. This will correct recoverable errors.

Now, hook up the second hard drive and use the drive manufactures utility to clone your existing drive to the new drive.

Once the clone process is complete, install the new drive in your computer and boot up.

Worst case, you may need to install Windows and some of your applications if critical file sectors could not be recovered.

At the first sign of any disk failure, update your backup and replace the drive.

If this sounds beyond your skills, take the computer to a local repair shop (not any chain stores) and have them replace your hard drive.


Collapse -

chkdsk /r to do "surface scan" for bad sectors / clusters

by Walter Bishop In reply to how do i repair the bad s ...

"Repair bad sectors" is a misnomer,
as they don't get repaired, just "reallocated / replaced"
but if windows finds bad sectors,
it only marks them as bad at the file system level in the MFT / FAT and ignores them after that

to see this in action, take a disk with bad sectors that chkdsk /r or format has marked as bad
and delete the partition, create a new partition and format it with full format
you'll hear the disk go clickety click click click on sectors that were previously marked bad on the old partition
if you repeat the process over and over it will do it until the cows come home,
or SMART does something about it

There are 2 implementations of SMART
Self Monitoring And Reporting Technology
Self Monitoring And Repair Technology

the first just whines about problems and does nothing

the second type has more than one course of action which may be available
including repeated attempts to get the data out of the bad sector
if you hear a disk go clicketly click click for an extended period of time
it's either completely gone, (as in disks which have been dropped will do this and never recover)
or it's trying to move the data in the sector to a replacement / spare sector so it can mark the bad one in the disk's firmware as "replaced / reallocated"

the Mfg. utilities work on the firmware level with whatever SMART implementation they have used
Seatools for Seagate / Maxtor disks
does read scans and marks & reallocates any sectors it finds bad

Seatools also has some limited functionality with other disks but may report false data
eg. WD uses a different measurement for Temp. and Seatools reports all WD disks as overtemp

copied from the CMD Screen

C>chkdsk /?
Checks a disk and displays a status report.

CHKDSK volume path filename /F /V /R /X /I /C /L :size
/R Locates bad sectors and recovers readable information (implies /F).

Collapse -


by erenismoh In reply to how do i repair the bad s ...


currently if your using O.S Win7 please follow this step:

1. Open my computer.
2. Seek for the local drive C which is your HDD that has a BAD SECTOR.
3. Right Click on it > Properties > Tools.
4. Look for "Error Checking" then click > CHECK NOW
5. New tab will show, check all the necessary check boxes

and click "Start"

then you'll need to reboot it and while rebooting.
just wait till the checking of HDD Error to finish

FYI: it will automatically fix all the bad sectors the the checking will encounter.

Hope this will help you .

Collapse -

Reponse To Answer

by gechurch In reply to CHECK DISK ERROR

Thank you for posting these steps eren (and in fact these steps are the same for other versions of Windows as well).

I do want to be clear about some wording though. As Walter has stated Windows is not able to fix bad sectors. It can find them and will make a note to itself not to try to use those sectors again, but it can do nothing to fix them. Once the OP has run through the steps you have provided, he will need to open the event log and find the output from the chkdsk. If it shows anything other than 0KB bad sectors, then he will need to replace his drive as it is failing and will start to get more and more bad sectors and will corrupt more files.

Related Discussions

Related Forums