[CentOS] Drive problem

I was rsync'ing data from one system to another, and the recipient
suddenly started throwing DRDY errors. Now, it's a fairly new WD Red 3TB,
and I'd think it was just a bad drive... but I'm really confused by this,
from the logs:
Jun 15 15:34:43 <servername> kernel: ata3: SError: { Dispar }

Dispar? And googling, every reference I find to that word always has
something else there.

System's running 5.11. Filesystem's xfs.

Any thoughts?

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