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I'm setting up a RAID and it has the option "data protection". By default it's disabled but can be changed to enabled. I google searched and found this

Data Protection: Use this item to enable or disable data protection.

I'm setting up two RAID 1 arrays of 2 HDs each. Any suggestions or info?

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  • That option toggles support for the ANSI T10 DIF. See ibm.com/developerworks/aix/library/au-T10E2E.
    – Dan D.
    Commented May 8, 2014 at 2:04
  • @DanD. but the card was not made by IBM...
    – Celeritas
    Commented May 8, 2014 at 3:33
  • Doesn't matter that's what the option toggles and the link describes what that option enables does.
    – Dan D.
    Commented May 8, 2014 at 7:12

1 Answer 1

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Per "The Data Protection Feature / MegaRAID" in Broadcom KB:

The Data Protection feature is an additional method of preventing data corruption by delivering end-to-end data integrity through the full I/O path from the application to the disk drive. This feature is officially called T-10 Protection Information (T-10 PI) and requires special hard drives with 520-byte sectors.

The feature is essentially Parity which is done internally on the drives that support T-10 PI.

What does that mean, really? Not totally sure yet searching for "T-10 Protection Information" leads to e.g. "Can someone explain in ''English'' What T10 Pi is for a raid config?" on Reddit with a similar explanation:

TL;DR It's a method of doing error checking on data that covers the full I/O path rather than just being done by the OS or the storage controller.

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