I tend to agree with Richard on this- if it's working
leave it alone.
I will add some things that I've found. I have been
using Vista since June when Beta2 came out. When
I first started messing around with ReadyBoost I found
that it can be a bit tricky at times to get it to work and
keep it working. Some flash drives don't seem to work
the first time that you put them in, but if you format the
device and test it again, it does. Putting the device in
another USB slot might get it to pass testing. Not plugging
it into a USB hub may get it working. Going into Device Manager
and checking under the tab "Policies" for 'Optimize for Performance'
of your USB device may get it to work. Sometimes clicking
users get their sticks to work right away with no problems, and
it may be because they are simply using a better/faster USB
Also, every so often, when I put my computer to sleep or even
on some reboots, ReadyBoost would not be working upon
restarting. I would then pull it out and stick it back in, only to
be told my USB stick didn't have enough room. The ReadyBoost
file was on there but not being used. A quick format would get it
working again. I then tried formatting it with NTFS, since then I
have not had any problems with it not working after awaking from
Some say FAT and FAT32 are a bit faster than NTFS on small drives.
NTFS is more solid, robust, and more stable than FAT or FAT32.
Some say NTFS *may* wear-out a USB flash drive quicker than FAT.
I don't know.
I do know this, if you have 1GB and over of RAM, you are likely not
notice any performance increase when using ReadyBoost- I really
think the feature is a bit over-hyped. I have 2GB of RAM on this laptop,
and the only time I have ever noticed ReadyBoost giving me a boost,
is when I am using a virtual machine. YMMV, of course.
Anyway, if ReadyBoost is working as is, I'd leave it alone until it
gives you a problem. If it does, try formatting it to NTFS.