you actually don't need capacitors for rotating media, Western Digital has a feature called "ArmorCache" that uses the rotational energy in the platters to powe

you actually don't need capacitors for rotating media, Western Digital has a feature called "ArmorCache" that uses the rotational energy in the platters to power the drive long enough to sync the volatile cache to a non volatile storage. https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/collateral/tech-brief/tech-brief-write-cache-data-safety.pdf https://documents.westerndigital.com/content/dam/doc-library...