Windows 2000 and Ultra DMA
Posted on 2000-03-01
I have a S1696DLUA mobo with 64MB EDO ram and two Pentium II 300 Mhz processors.
I have just upgraded to Windows 2000 from Windows 98. I have a Seagate ST36531A 6GB hard drive on the Primary Master IDE slot and a Quantum Fireball ST6.4A 6GB drive on the Primary Slave IDE Slot. I have a Panasonic 40x CD and a SONY DVD ROM on the Secondary IDE channel.
When Windows 2000 installed it told me that my hard drive controllers were
incompatible. I went ahead with the install anyway. Now, when I look in
the computer manager, it tells me that the hard drives are using no DMA
The registry key
HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\Scsi\Scsi Port 0\DMAEnabled = 3
while the key
HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\Scsi\Scsi Port 1DMAEnabled = 0
I have run the Microsoft DMACHECK.EXE utility and this tells me that DMA
support is not detected on the primary IDE channel and is detected, but
not in use, on the secondary.
Is this a motherboard BIOS problem, or something to do with the hard drives
or CD/DVD drives?
Both IDE Channels were happy to use DMA under Windows 98 and Windows NT 4 (sp5).
Under Windows 98, there was even a DMA checkbox in the drive properties. Why wasn't that introduced into NT5?????
BTW, I have applied the the LX96202.ROM BIOS Upgrade