After prodding around the settings for my ReadyCache, I discovered that Windows had set the disk to PIO mode, which obviously has a huge impact on the disk. It’ll reduce it to being slower than the main hard disk, and was disabling disk functions that were probably relied upon by ExpressCache.
After forcing DMA mode on the drive, the problems seem to have been fixed. (If you don’t understand what this is, then you probably shouldn’t risk messign around with it.)
