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Wondershare recoverit reddit12/20/2023 As it turns out, the probability of logical bad sectors in SSD is even greater than in HDD. So that explains bad sectors for an HDD, but what about an SSD that doesn’t have platters or heads for accessing data. Using disks under extreme conditions, such as high temperature, dust, ultrasound, and violent vibration, can destroy platters or disks and cause bad sectors.All these can cause damage to the operation of platters and heads. The poor working condition of disks causes bad sectors, such as unstable voltage, and overshoot current.Bad usage habits can result in bad sectors on disks, such as frequent collisions, improper software operation, excessive I/O for a long time, forced shutdown, etc.But if users reset the disk firmware, the bad sectors will be exposed. Usually, these manufacturers will hide this secret during low-level formatting. Due to technical issues, disks may have bad sectors before leaving the factory. These structures can verify each sector’s positioning, data synchronization, and correctness checking. In this way, the reading of data can be realized.Īnother component of a disk is sectors, the logical structure of which include gap, sync, address mark, data, and ECC. Based on changes in the electric field, the polarity of the magnetic media on the platter can be identified. After that, the disk can generate an induced electric field in the disk coil due to the head passing over the surface of platters. The changes in polarity are generated by the current change of the head coil, which is only 0.1~0.3 microns to the surface of the magnetic media. ![]() Hence, the cooperation between platters and heads realizes the addressing of sectors.Īs for the data writing process, it occurs when changing the polarity of the magnetic media on the platter. The motor shaft drives the platters to rotate, and the head can move in the radial direction. The polarity of magnetic media (N/S) is used for recording data storage. They are made from hard metal materials and magnetic media. The platters of HDD are what carry the data storage.
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