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Hard Disk Drive Bad Sectors.


Bad Sector Explained


Extended utilisation of a Hard Disk Drive will inevitably involve an increase in the hard disk drives bad sector count. Bad sectors involve damage to the magnetic storage media of a hard disk that canít be resolved. When a hard drive is new, it will include un-allocated sectors available to accommodate data write fails due to bad sectors. This is achieved under the control of firmware resident in the hard disk drive control PCB, unless there is continual error fail reports is transparent to the operating system.

Once these un-allocated sectors are used up, the hard drive canít move the data in the bad sectors to a new sector, so it keeps the data in the bad sector. By this time, however, the operating system will attempt to read this data and could have difficulty reading the data.

When data is stored in bad sectors you may start to see a few things happen with your computer: loss of data, the system becoming unresponsive, or the system crashing. To avoid this situation it is important to check your hard drive on a regular basis, probably weekly but a least monthly, to ensure there is no problem.

Detecting Hard Disk Bad Sectors.


There are many tools that can easily check for problems with your hard drive. The hard drive vendors have tools that can easily read the diagnostic data of your hard drive and alert you to any problems. For example on the Western Digital web site Data Lifeguard Diagnostic for Windows tool is available for download.


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Bad Sectors or a Virus?



Accumulated Bad Sectors can exhibit similar response symptoms to that of a virus infected PC , however the symptoms associated with bad sectors are normally accompanied by Windows or applications error messages.



However simple to use vendor test aps can help you determine the nature of the problem. If you however canít find your hard driveís vendorís tool, you can run Windows disk checker tool:


1.Double-click My Computer on your desktop.
2.Right-click a drive letter, and select Properties
3.Click the Tools tab.
4.Click the Check Now button.
5.Check the Scan for and attempt recovery of bad sectors checkbox.

Regardless of which process you choose, checking your hard drive can take a long time. If it does find bad sectors, you should copy any data that isnít backed up and replace the hard drive.

If you have a Hard Disk Drive Bad sector problem or suspect your hard disk drive has bad sectors and you are now unable to access your data then contact our data recovery service help desk.


Bad Sector Map





 
       
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