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as I know bad sector on a surface result from magnet the platters many times , but when we save files on a hard and delete it many times we make that at some parts of the platters and not at all the platters surface , and if the heat effects on the life of the hard that mean a parts of the hard either , so how could that happend , there must be a way that we can use the rest of that hard , specially that the Percentage of the rest will be too large
To understand the meaning of bad sectors you have to know that they come in2 forms:
1- Hard bad sector aka physical : just like the name indicates; a cluster that is damaged physically. And they are many reasons for why this happens, for example, manufacturing errors ( it happens ), bad shipping...etc, and these are mechanical reasons ( HDD ). For SSD, they are known to wear and tear, due to reaching the limits of reading-writing.
2- Soft bad sector aka logical: These can stop the OS from reading or writing anything to these bad sectors, reasons behind that varies from, force shut down ( electrical failure ), some viruses and malware could also cause soft bad sector.
Both forms can and will lead to loss of data and delay in writing new data too.
How to repair ?
1- Physical Bad Sector : Cannot be repaired. You have to back up your whole data ASAP on a new healthy HD, to minimize your losses, otherwise, more and more sectors will be damaged.
2- Logical Bad Sector: Can be repaired. There are many methods to save a HD from this bad sector like, Windows Check Disk tool which comes as a built in software.
TIP: Google Hard DIsk Sentinel Professional. Its a good and useful HD monitoring and analysing software
The sector won’t respond to read or write requests.
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