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[[Hitachi]], [[Micron Technology|Micron]], [[Seagate Technology|Seagate]], [[Samsung]], and [[Toshiba]] are the disk drive manufacturers offering [[Trusted Computing Group]] [[Opal Storage Specification]] [[Serial ATA]] drives. HDDs have become a commodity so SED allow drive manufacturers to maintain revenue.<ref>{{cite web |last1=Skamarock |first1=Anne |title=Is Storage a commodity |url=https://www.itworld.com/article/2799690/is-storage-a-commodity-.html |website=ITWorld.com |publisher=Network World |accessdate=2020-05-22 |date=2020-02-21}}</ref> Older technologies include the proprietary Seagate DriveTrust, and the older, and less secure, [[Parallel ATA|PATA]] Security command standard shipped by all drive makers including [[Western Digital]]. Enterprise SAS versions of the TCG standard are called "TCG Enterprise" drives.
There are other (non-TCG/OPAL based) self-encrypted drives (SED) that don’t have the known vulnerabilities of the TCG/OPAL based drives. For example, ClevX SEDs (2.5” SATA and M.2 NVMe form-factors) with smartphone user-authentication and remote management ready<ref>{{Cite web |title=ClevX's DataLock Secures M.2 SSDs With a Smartphone |url=https://www.tomshardware.com/news/clevx-datalock-secures-m2-ssds-with-smartphone |access-date=2023-12-28 |website=Tom's Hardware |language=en}}</ref>. They are Host/OS and BIOS independent and don’t rely on the TPM module or the motherboard BIOS, and their Encryption Key never leaves the crypto-boundary of the drive.
=== Enclosed hard disk drive FDE ===
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