Hello,
The first question I can imagine you are thinking is what am I talking about or why? : )
For a project I am working on we are using Windows 8.1 with SATA configuration in IDE. Not AHCI.
A few years ago you use to be able to go to the following [FONT=&]Hard Disk Controller ClassGuid[/FONT]
registry:
HKLM\System\CCS\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}
And set the UDMA mode by adding the following DWORDS in the registry:
MasterDeviceTimingModeAllowed 0xFFFFFFFF
SlaveDeviceTimingModeAllowed 0xFFFFFFFF
UserMasterDeviceTimingModeAllowed 0xFFFFFFFF
UserSlaveDeviceTimingModeAllowed 0xFFFFFFFF
MasterDeviceTimingMode 0xFFFF
SlaveDeviceTimingMode 0xFFFF
Where 0xFFFFFFF could be changed to the following to set the IDE UDMA speed:
for Ultra ATA33 (33.3MB/s) - 0x2010
for Ultra ATA66 (66.7 MB/s)- 0x8010
for Ultra ATA100 (100MB/s) - 0x10010
for Ultra ATA133 (133 Mb/s) - 0x12010
Where some of the different UDMA modes are shown here:
The registry:
HKLM\System\CCS\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}
and all the proper sub registries still exists in Windows 8/8.1 but I cannot get Windows 8 to change from UDMA Mode 5.
Anybody?
The first question I can imagine you are thinking is what am I talking about or why? : )
For a project I am working on we are using Windows 8.1 with SATA configuration in IDE. Not AHCI.
A few years ago you use to be able to go to the following [FONT=&]Hard Disk Controller ClassGuid[/FONT]
registry:
HKLM\System\CCS\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}
And set the UDMA mode by adding the following DWORDS in the registry:
MasterDeviceTimingModeAllowed 0xFFFFFFFF
SlaveDeviceTimingModeAllowed 0xFFFFFFFF
UserMasterDeviceTimingModeAllowed 0xFFFFFFFF
UserSlaveDeviceTimingModeAllowed 0xFFFFFFFF
MasterDeviceTimingMode 0xFFFF
SlaveDeviceTimingMode 0xFFFF
Where 0xFFFFFFF could be changed to the following to set the IDE UDMA speed:
for Ultra ATA33 (33.3MB/s) - 0x2010
for Ultra ATA66 (66.7 MB/s)- 0x8010
for Ultra ATA100 (100MB/s) - 0x10010
for Ultra ATA133 (133 Mb/s) - 0x12010
Where some of the different UDMA modes are shown here:
[FONT=&]Mode 0[/FONT] | [FONT=&]16.7[/FONT] | [FONT=&]MB/s[/FONT] |
[FONT=&]Mode 1[/FONT] | [FONT=&]25.0[/FONT] | [FONT=&]MB/s[/FONT] |
[FONT=&]Mode 2[/FONT] | [FONT=&]33.3[/FONT] | [FONT=&]MB/s[/FONT] |
[FONT=&]Mode 3[/FONT] | [FONT=&]44.4[/FONT] | [FONT=&]MB/s[/FONT] |
[FONT=&]Mode 4[/FONT] | [FONT=&]66.7[/FONT] | [FONT=&]MB/s[/FONT] |
[FONT=&]Mode 5[/FONT] | [FONT=&]100.0[/FONT] | [FONT=&]MB/s[/FONT] |
The registry:
HKLM\System\CCS\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}
and all the proper sub registries still exists in Windows 8/8.1 but I cannot get Windows 8 to change from UDMA Mode 5.
Anybody?
My Computer
System One
-
- OS
- Windows 8.1
- Computer type
- PC/Desktop