bus mastering / hd DMA access etc.

[RJK]

Does anyone know why there is an option in bios, (on a MSI Kt6v), for "IDE
Bus mastering," or is it likely to interfere with the UDMA IDE drivers that
were stuffed into my brothers machine, when I ran the mtoherboardsdisk,
after swapping out his motherboard, zero filling his hs, and reisntalling
everything.
Does it need to be enabled ?

regards, Richard

 

[SlowJet]

If the bios has auto for bus master then use that or just enable.
I means that that PCI will handle a bus mastering device if installed and it
will default to a time of 40 ms that the device can use the bus. (It's a
hadware bus thing)

The IDE onboard channels need to be busmaster enabled to get high disk
rates. The bios setting should be about hardware and the UDMA bus master
driver just determines how that data is bused (to and from the memory)

It is very doubtful that a try it and see will harm any thing.


Note: If you primary ide channel indicates that you are using the correct
UDMA mode then don't worry about because windows is running the show. But
the boot up may be faster with it enabled, before the UDMA diver is loader.
If after messing around and the Pri chan is only UDMA Mode 1, use hardware
manager and delete the UDMA bus master driver and let it reinstall with a
reboot.
I may increase to a higher UDMA Mode 2 or 3
SJ

 

[RJK]

Thanks SlowJet, much obliged.

regards, Richard

If the bios has auto for bus master then use that or just enable.
I means that that PCI will handle a bus mastering device if installed and
it will default to a time of 40 ms that the device can use the bus. (It's
a hadware bus thing)

The IDE onboard channels need to be busmaster enabled to get high disk
rates. The bios setting should be about hardware and the UDMA bus master
driver just determines how that data is bused (to and from the memory)

It is very doubtful that a try it and see will harm any thing.


Note: If you primary ide channel indicates that you are using the correct
UDMA mode then don't worry about because windows is running the show. But
the boot up may be faster with it enabled, before the UDMA diver is
loader.
If after messing around and the Pri chan is only UDMA Mode 1, use hardware
manager and delete the UDMA bus master driver and let it reinstall with a
reboot.
I may increase to a higher UDMA Mode 2 or 3
SJ