Bad XP Hard Drive Behaviour.

I am having delayed write error problems with a hard
drive connected to an additional ATA-133 Card. My
Question to you is not about dealing with this card. I am
in e-mail contact with that company about the card. I
will eventually have to replace the card, but need to fix
a Windows XP behavior in the mean time.

I installed an I/O Flex Ultra ATA 133 Raid Controller
Card at the same time I upgraded to Windows XP Pro w/ SP1
and a new motherboard and processor. For some reason XP
uses the Maxtor 120GB hard drive I put on the card as
drive 0 (primary cable position, cable select) as its
choice for temporary backups of files and folders. When
things like windows updates being extracted from saved
files or are being installed, XP backs up to my drive H:,
[120GB biggest drive] and almost always it tells me the
data is lost. Right from the beginning I started
encountering near constant error messages:

"WINDOWS - DELAYED WRITE FAILED
Windows was unable to save all the data for the Drive H:
[various folder and file locations depending on what
windows was doing]. The data has been lost. This error
may be caused by a failure of your computer hardware or
network connection. Please try to save this information
elsewhere."

This is a short map of drives connected:
Motherboard IDE Channel 1 Position 0
Maxtor 20 GB (For OS)
Motherboard IDE Channel 1 Position 1
Maxtor 80 GB (For Data)
Motherboard IDE Channel 2 Position 2
Yamaha CD Burner
Motherboard IDE Channel 2 Position 3
NEC DVD Burner
IOFLEX-PIR133 card IDE Channel 1 Position 0
Maxtor 120 GB (For Video)
IOFLEX-PIR133 card IDE Channel 1 Position 1
Unpopulated
IOFLEX-PIR133 card IDE Channel 2 Position 2
56x CD Player
IOFLEX-PIR133 card IDE Channel 2 Position 3
Unpopulated


I had to turn off system restore for this drive because
it was driving me nuts.

What I want to know is, How do I stop Windows XP from
using my drive H:? It is intended only for working with
large video files and nothing else. I would like to
force XP to restrict its file activity to the Operating
System drive (C, or maybe the Data drive (D.