Slow h/d copy from SATA to IDE????

I have an XP (sp2) system on my SATA drive and a Windows 2000 (sp4) on
my IDE drive, all on my MSI K9NBPM2-FID motherboard with an AM2 5600+
processor. This motherboard has both IDE and SATA, and my IDE drive
is housed in a removable tray. When I boot up in Windows 2000 and
copy an mpeg file (1.5 gigabytes) from my SATA drive to my IDE drive
it completes in 10 to 20 seconds. But, when I boot up in XP (sp2) and
copy the same mpeg file from SATA to IDE, it takes about 9 minutes.
When I go into control panel/hardware/device manager/IDE controllers/
Advanced Settings (in my XP system) it shows DMA if available (NOT
PIO). I do not understand why Windows 2000 can copy this exact same
file from the exact same location to the exact same destination in
about 20 seconds but my XP system takes about 9 minutes???????? It
so happens I have the XP system configured also to be on a network to
a nearby PC, and I can copy this same mpeg file from the SATA over the
network to the nearby PC in about 3 minutes, so, I am dumbfounded as
to why XP takes so long to copy from SATA to IDE. If I didn't have
win2k installed on this same PC (to the IDE) drive and saw for myself
how fast Win2k completed the very same transfer, I wouldn't believe
it. There must be something bizarre about the way my XP system is
configured - any ideas?