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On older hard drives (pre-1990s) and floppy disks, a user could perform LLF through the system BIOS. The process did the following:
| Operation | What it actually does | Safe for HDD? | Safe for SSD? | |-----------|----------------------|---------------|---------------| | Zero fill | Writes zeros to every user-accessible sector | Yes | No (use Secure Erase instead) | | Secure Erase | Resets all NAND cells to an empty state | N/A | Yes | | Factory restore | Re-runs drive self-test & reallocates bad sectors | Sometimes | Rarely | low-level formatting
By following these steps and best practices, you can prepare a well-formatted text that is easy to read and understand. On older hard drives (pre-1990s) and floppy disks,