I posted a fix for this I found here. http://blogs.technet.com/b/kevinholman/archive/2013/06/21/event-id-129-storachi-reset-to-device-device-raidport0-was-issued.aspx
Turn off "Link State Power Management" in the Power Plan - PCI Express
I was able to solve this problem:
1. A temporary work-around is to disable the Paging Executive. Disabling the Paging Executive prevents Windows from swapping memory used by device drives out to the paging file. The path to the registry entry is here:
\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
and the key is:
Change the value from 0 to 1 to disable. You will need to reboot to put the change into effect.
2. An actual fix, as apposed to the work-around, appears to require a BIOS update. Motherboards with the Intel RAID controller (mine happens to be ICH10R, but there are others) include BIOS code for the chip. This is called a ROM option. Upgrading the MB's BIOS includes any available upgrades to the RAID controller's BIOS. My upgrade took me from version 126.96.36.1996 of the Intel Matrix Storage Manager to version 188.8.131.523 of the Intel Rapid Storage Technology (Intel has renamed their RAID software to Rapid Storage Technology).
Interesting but my Intel Rapid Storage Technology is already at 184.108.40.2060 (A13).
I have not had an error 129 - reset since Sept 30 when I disabled the Link Power Management under the performance tab of IRST
I first started having this problem after a drive that was part of a RAID 1 volume failed. That was back in April of 2014. Somehow, and I can't recall how, I did something that caused the problem to go away completely until about 2 weeks ago, when the remaining original drive of the RAID 1 volume failed. I've since replaced all the hard drives with newer ones and that's when this problem started again. I'm wondering if the firmware in the newer drives is not compatible in some way with the older ICH10R BIOS.
There seems to be a handful of disparate solutions to this problem.