Win2k + PHP + dynamic disk mirroring

Is anyone running PHP on Win2k with dynamic disk mirroring? If so, have you had any problems with it? I have a problem where include files are being corrupted somewhere between the disk and PHP and it's causing huge problems. The only difference between this server and the other servers we have running PHP is the dynamic disk mirroring. We'd seen it a couple of times on other sites we host, but we've recently installed ezPublish and it's become almost constant. For an example, go to http://www.gurn.to/ - if you get an error on the page, simply hit refresh until it goes away (sometimes it doesn't). That will show just how random it is. We are not experiencing any other filesystem problems on that server. We don't want to disable the mirroring without being pretty sure it will solve the problem. All experiences/insights, good and bad, are appreciated. -- Stuart