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mfm
mfm Membro Senior Registrado
217 Mensagens 0 Curtidas

Meu HD não aparece como UDMA 4, pq ?

#1 Por mfm 28/10/2002 - 21:00
Olá, pessoal, meu HD é um Quantum Fireball LCT 20 30 Gb, ele é UDMA 4 ATA 66, e minha placa mãe tb suporta ATA 66 UDMA 4, só que no windows XP ele trabalha em Ultra DMA Mode 3....

Pq UDMA 3 e nãoUDMA 4 ?

já liguei ele em outro PC (p3 600, placa mae intel) e ele foi detectado como UDMA 4...

O chipset de minha mobo é um Via Apollo pro 133

Eu estou usando cabo de 80 vias
punkth
punkth Membro Senior Registrado
412 Mensagens 0 Curtidas
#2 Por punkth
28/10/2002 - 21:19
E ai grande... eu tinha um problema parecido no XP.. veja como resolvi?
Não é exatamente seu caso.. mas ja é um caminho :lol:

For those who haven`t gained any (U)DMA in windows2000/XP by default or with
driver updates there may be a solution left.
Ok Here is how you do it:

First of all. Make absolutely sure this is not a BIOS problem or lack of proper

40pin/80 connector UDMA cable. But I trust you all now the basic rules

Afterwards go to the following lines in your windows2000/XP registry:
(This line is only for those who needs to utilize ATA66 in addition to (U)DMA)!
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-
BFC1-08002BE10318}\0000
Make a new DWord named "EnableUDMA66" and give it the value: 1

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-
BFC1-08002BE10318}\0000
Make a new DWord named "DMA fix"; and give it the value: 1

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-
BFC1-08002BE10318}\0001
Make a new DWord named: "DmaDetectionLevel"; and give it the value: 2

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-
BFC1-08002BE10318}\0002
Make a new DWord named "DmaDetectionLevel" and give it the value: 2

(For those who have a PCChips motherboard with a SIS 530/540/620/630 chipset
Run the W2kide.exe from PCCHIPS to set up the correct timings and detection of
your UDMA cabel (This is important !!! ) You can get it here:
ftp://210.17.18.14/driver/ide/win2000/sis630.zip
I know that a lot you folks have tried this utility with no luck. And you are
probably quite tired of it : ) But it wont work without the above added
registry lines either. But if you add the registry fix as described above and
use this SiS utility you could possibly gain BETTER transfer rates in win2k/XP
than in Win98/ME. Hard to believe;I know. But trust me on this. I`ve done it!)

Next: Reboot.

You will know have (U)DMA/ATA66 transfer rates in windows 2000/XP. Just
remember one thing: With these added registry lines you leave windows no choice

whether it should use (U)DMA or not. You are forcing it to do so! But it
haven`t given me any problems yet. Only advantages.Enjoy ; )
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