Comment 17 for bug 990913

Since my last comment, an updated kernel arrived via Update Manager. Its changelog included the following:

   * md: fix possible corruption of array metadata on shutdown.
    - LP: #992038

This seems possibly relevant. I updated, and have now rebooted several times. The RAID degradation is still happening, on every reboot. As before, the system runs just fine after I finish fixing up RAID.

I am now keeping detailed notes on which partitions are being degraded. Since it takes me anywhere from fifteen minutes to several hours to accomplish each reboot and ensuing repair, and I have other things to do as well, it will be a while before meaningful statistics are accumulated.

Further details I forgot to mention earlier: This is an AMD64 system with 8GB of ECC RAM. Have attached most recent dmesg.