Re: Honest question...
Haven't worked on data integrity features for almost a decade, but 4228 would allow a 4K sector to have a T10 DIF field on each of 8 512 byte sub-sectors.
More likely it fell out of the implementation (which allows 512 byte sectors with T10 DIF) and got put on the data sheet as a potential differentiator.
Less likely: someone is playing with a capabilities architecture, access control tags, or the like, and simply wants to be able to reserve space at the sector level for future use. This is exactly what the 520 byte sectors offered, used in proprietary ways ~20 years ago in high end arrays like Symmetrix to ensure data integrity.
Biting the hand that feeds IT
