![]() The SSD then deletes all of the data on the original block and writes the new data that it was trying to write in the first place. When an SSD is trying to clear a data block, it puts a copy of everything on the block into a cache and makes the necessary changes there. In contrast, SSDs have to delete an entire data block before they’re able to reuse it. Essentially, hard drives are able to delete information from part of a data block – they don’t have to delete the whole thing. At that point the drive swiftly deletes that particular piece of data from that part of the block, and writes the new file there. When a file is deleted in the computer’s file system, the data stays on the block until the next time that block is needed. When you delete a file in your operating system, for example, the hard drive deletes only that specific file’s information from the data block, leaving the rest in place. Each data block has data from more than one file, and on a hard drive the blocks can be split whenever necessary. ![]() On hard drives and solid state drives, data is stored in blocks.
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