I've just added an SSD as a ReadyBoost cache drive, and have two minor cosmetic issues with it:

• the drive still shows up in the drive list
• I get a warning balloon every five minutes that the drive is full and that I should empty the Recycle Bin.

The former is ignorable (and I guess I can solve it with a group policy); the latter is somewhat going on my nerves.

Are there official buttons "hide ReadyBoost drives" and "do not warn on low diskspace for ReadyBoost drives" somewhere that I may have missed?

If not, I guess I can use the group policy to hide the drive; I'd still need a way for the system to not warn about the drive being full.

Also, am I right that I need to assign a drive letter and format the drive with NTFS to use it for ReadyBoost, or is there a way to just use the raw device?