to explain further,
current sata(serial ata) bus support up to 150mBps. however, right
now, no sata disk could actually send this fast.. cos now existing
sata disk speed can spin 60mBps.
IDE bus runs at approx +/- 130mBps. now existing IDE max disk speed
can go to 50+mBps. IDE can go parallel... so if u use 2 IDE disk
which can add up to 110+mBps if both drives sends data through the
bus.