An administrator needs to securely dispose of 150 computers with SATA HDDs. Which of the following methods would ensure all data is erased in the MOST secure manner?

Degaussing is effective on magnetic media but leaves the physical platters intact and may not reliably erase all data on modern high-density drives with perpendicular recording.

Disk-wiping software can fail if drive sectors are reallocated or if the drive firmware has hidden areas, leaving residual recoverable data.

Zero-filling overwrites data but shares the same limitations as disk-wiping - it cannot reach remapped bad sectors or firmware-reserved areas.

Shredding physically destroys the magnetic platters into small fragments, making it impossible to reconstruct data by any means including magnetic force microscopy. Unlike software-based methods, physical destruction eliminates the medium itself and is the gold standard for secure disposal of sensitive data per NIST SP 800-88 guidelines.

Destroying the partition table only removes the file system index; all underlying data remains fully intact and easily recoverable with forensic tools.