Quote Originally Posted by Leo_A View Post
That said, couldn't they use the internal flash memory as a caching device? Why does it have to be a hard drive?
There's not that much space you can count on. It's better than not having any space, but since an internal flash drive isn't going to have as much storage it means that, once you take into account OS and user stored material on the drive, there's less of an ability to count on having a big block of storage free for caching. It's easier for the manufacturer to reserve a large block for caching on a drive with a large amount of space.