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What should a system administrator use to wipe all files on a hard disk?
Low-level formatting
High-level formatting
Disk overwriting
Shredding
Low-level formatting is the appropriate way to wipe (erase) files on a hard disk. Formatting does not actually delete data, just removes the address tables. Shredding means physical destruction of the disk. Actually should be: Low-level formatting Low-level formatting is a procedure where you write data directly to the storage medium, bypassing the file system layer. You do not care if the hard disk has one partition or more, NTFS or BTRFS or anything else. You are using the device driver, which can be IDE or SCSI or SATA or others, and you're writing data to physical sectors. More importantly, low level formatting will write to each and every bit on the storage device, making sure the old states are destroyed forever, and with them, any trace of former data previously stored.
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