The "verification errors" are sectors whose contents on disk 1 and disk 2 differ. I observed the same issue several times even if all previous system shutdowns were clean.
Once I used sleuthkit (sleuthkit.org) from a Linux Live-CD (grml.org) to check which files are affected: All those differing sectors where part of C:\pagefile.sys. This suggests that pending writes to swap area might not be flushed to both disks on shutdown. This should be harmless.
Further observations suggest that a few verification errors are reported in most cases (tested with RST 10.6.0.1002).
Another verification (with "repair" unchecked) from today reported 34 verification errors. Comparing both drives under grml Linux produced the same result: All differing sectors were part of C:\pagefile.sys.
Is this as expected?
Is this fixed in newer drivers?
Are writes to Windows swap space possibly handled differently (e.g. not always mirrored) ?
Very interesting; thanks for posting. At work we've tried Windows 7 mirroring, which seems to be trouble prone at the very least, and AMI BIOS mirroring, which as far as I can tell doesn't even have a monitoring program such as the Intel program that we're discussing here.