2TB HDD = TIMEOUT - READ_DMA48 ....

From: Darren Reed <darrenr_at_fastmail.net> Date: Wed, 13 Oct 2010 22:59:39 +0000 · This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:40:08 UTC

As another body that today bought a 2TB HDD, I can confirm the presence
of kernel messages relating to READ_DMA48 with FreeBSD 8.
The drive in question is a Hitachi one, not a Samsung.

Is it the drive, system or operating system?

Well, the drive works without any such error with both Windows 7 and 
NetBSD 5.1.

So it looks like the finger is now pointing as a bug in FreeBSD... and 
if it is fixed in HEAD then it needs to be merged into the branch for 8.1.

Darren