Technology
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It sounds like the article is an update to the age old performance issue discussions between hardware and software RAID solutions.
If you use a software solution for anything where there's a dedicated hardware solution, the software solution is always slower due to CPU overhead.
Article recommendation boils down to: If you're going to use encryption, and you want your full disk speed, use a hardware encryption solution. In their test their hardware supported OPAL.
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Be aware, this password is different than the Physical Secure ID (PSID) printed on the front of the disk. PSIDs are used when the release to reset command doesn't work, typically due to key issues, and the drive gets "locked".
You use the PSID to run a revert to factory defaults command, unlocking the drive. Since this triggers the drive to release its' key, the drive is considered "cryptographically erased" when you do this.
If you revert the drive, data on it is unrecoverable.
If you're going to revert a drive, I suggest using a QR Code reader to get the PSID off the drive. Some venders are sadists with the font they choose making it so much fun to figure out if it's a 1, l i I I O or 0...