I have about 20K of music files and photos. For some reason when I run a library scan on Windows Media Center 7 it takes a long time. The progress bar seems to process a few files every few minutes. What I find strange is that when I check/refresh the device status page, I notice that for every read on the disk there is a write to the parity drive. Is this normal? Has anyone experienced this with WMC? If WMC is just reading the library why would there be parity writes?