Hard drive platter is one of the most important physical components inside the hard drives. The platters are the actual disks inside the drive that store the magnetized data. Traditionally platters are made of a light aluminum alloy and coated with a magnetizable material such as a ferrite compound that is applied in liquid form and spun evenly across the platter or thin metal film plating that is applied to the platter through electroplating, the same way that chrome is produced.

Newer technology uses glass and/or ceramic platters because they can be made thinner and also because they are more efficient at resisting heat. The magnetic layer on the platters has tiny domains of magnetization that are oriented to store
information that is transferred through the read/write heads. Most drives have at least two platters and the larger the storage capacity of the drive, the more platters there are. Each platter is magnetized on each side, so a drive with 2 platters has 4 sides to store data.

Hard Drive Platters overview
Hard drive platters overview

Scratched Hard Drive Platters
Hard drive platters scratched

Data Recovery From Hard Drives With Scratched Platters or Physical Bad Sectors

We usually call the platter scratches as the physical bad sectors on the platters and this is usually difficult data recovery cases.

people often ask if data recovery engineers are able to recover data from scratched hard drive platters and now let’s answer the questions here. If you the scratched areas are the SA or data areas of the platters, then it’s unrecoverable by the known data recovery technologies. Otherwise, we can still use some data recovery hardware technologies or tips to handle it and try to recover possible data from it.

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