I bought a new 40GB ATA133 harddrive (Maxtor OEM) to replace my old 3.2GB drive. The new HD (primary master) may be running at ATA133 but the boot information still lists it as ATA33.
My motherboard is a Biostar M7VIG (Athlon XP cpu, 266FSB) with an ATA133 controller (at least that's what the sticker says). The manual states that it supports Ultra DMA 33/66/100/133 Bus Master Mode.
Award BIOS settings:
PIO mode is Auto (I've tried Mode4, it didn't change anything visibly)
UDMA mode is Auto (only other option is disabled).
I'm running Win98SE. I installed all the Biostar motherboard's software (VIA 4in1 drivers).
Device Manager:
Disk Drives = Generic IDE Disk Type47 (DMA setting is checked)
HD controller = VIA Bus Master PCI IDE Controller (driver is VATAPI.vxd v2.0.950.120 copyright 2000-2005)
DMA controller (MS vmm32.vxd driver, setting=4) is working properly
Any ideas besides updating the BIOS?