Tim:
I had a system using LVM fail to boot, and when assessed using another drive (that would boot), got error reports like the above. Wherever the errors were, it was some place that LVM really did not like. I used dd to overwrite the entire drive, to try and force a write to wherever it was, and force the drive to try and fix what it could, and the errors got cleared up.
Nothing else I had tried cleared up the errors. The system got reinstalled, without LVM, just to see if the drive would keep on working, and it has. It's many months later, and there's no error reports, including while making deliberate checks.
Robin Laing:
I have had the same issue with a Western Digital as well. A WD5200 started giving these errors in FC6. Less than a year old.
I have since replaced the drive and put the WD in a USB carrier. Two complete wipes and reformats and tests and no errors found.
I wonder if it is an issue with SMART and the drives?
This was also a WD. I've had three in a row cark it, after the second that was the last of them I'd buy. The third was given to me. I'm less than impressed by anything they've made, so my bet's on there being something crappy about them (whether they have real drive faults, or badly managed fault detection).