Re: Dma mode has reverted to Pio mode..Please Help...:o)

Tech-Archive recommends: Fix windows errors by optimizing your registry

Hey Leif
Many thanks for your reply unfortunatly your fix didnt work...:O(
"Leif Nordmand Andersen" <lna@xxxxxxxxxxxxx> wrote in message
news:96cb619lvbc870gaan1a42211d3hp4a7pf@xxxxxxxxxx
> Hi Ram,
>
> On Tue, 19 Apr 2005 17:51:39 GMT, "RaM" <RaM@xxxxxxxx> wrote:
>
>>A friend of mines PC has recently started reading and writing dvds at x2.3
>>which is far to slow.
>>I have googled the prob and found that the prob is Dma mode has reverted
>>to
>>Pio mode as described here.
>>http://www.michna.com/kb/WxDMA.htm
>
>
> I've got some good news and I have got some bad news for you.
>
> First the bad news: I don't know why this happens, nor do I have a
> permanent fix for you!
>
> The good news: I do have a fix, that sets your Plextor to DMA mode in
> less than 4 seconds, if you follow this instruction.
>
> I had an Asus K7M board, I had The Plextor 12/10/32a as primary on the
> secondarychannel, and a CD as slave on the secondary channel. On this
> setup I couldn'trun both as DMA, the system would freeze during
> operation, so the Plextor wasDMA and the CD was PIO. A few days ago I
> upgraded to MSI K7T PRO2-a, and on this system both the Plextor and Cd
> will run DMA simultanusly.
>
> Unfortunately on both systems the Plextor would get reset to PIO on
> it's own - usually after 'sleep' mode, some kind soul send me a
> workaround.
>
> You need to find this path in your registry:
> [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}
> In my present setup there is 7 keys under this path:
> 0000
> 0001
> 0002
> 0003
> 0004
> 0005
> Properties
>
> In my old setup the information I needed was in Key: 0002, but when
> the workaround didn't work with my new MSI board, then I sought the
> reason why, and found, that key 0002 and 0005 (presumably installed
> with the new motherboard), had the same information, and that the new
> motherboard takes it's information from key 0005. So if this doesn't
> work on the default key 0002, look into one of the other keys, and see
> if the information is there too, then maybe the system gets the
> information from there - You will then have to change the line:
>
> [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}\0002]
> to the key with the information in, which on my system is:
>
> [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}\0005]
>
> The information is (you can copy it, and save as DMA_ON.reg if you
> want to):
>
> -------
>
>
> Windows Registry Editor Version 5.00
>
> [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}\0002]
> "EnumPropPages32"="storprop.dll,IdePropPageProvider"
> "InfPath"="mshdc.inf"
> "InfSection"="atapi_Inst_secondary"
> "ProviderName"="Microsoft"
> "DriverDateData"=hex:00,40,99,31,33,2e,bf,01
> "DriverDate"="11-14-1999"
> "DriverVersion"="5.0.2183.1"
> "MatchingDeviceId"="secondary_ide_channel"
> "DriverDesc"="Secondary IDE Channel"
> "MasterDeviceType"=dword:00000002
> "SlaveDeviceType"=dword:00000002
> "MasterDeviceTimingMode"=dword:00000410
> "MasterDeviceTimingModeAllowed"=dword:ffffffff
> "MasterIdDataCheckSum"=dword:000223db
> "SlaveDeviceTimingMode"=dword:00000410
> "SlaveDeviceTimingModeAllowed"=dword:ffffffff
> "SlaveIdDataCheckSum"=dword:00009186
> "UserMasterDeviceTimingModeAllowed"=dword:ffffffff
> "UserSlaveDeviceTimingModeAllowed"=dword:ffffffff
>
>
> ------
>
> The settings for:
> "MasterDeviceTimingMode"
> "MasterDeviceTimingModeAllowed"
> "UserMasterDeviceTimingModeAllowed"
> are different for UDMA, DMA and PIO mode.
>
> If you set it like above you will get DMA on both channels, if your Cd
> on the secondary channel can run UDMA, then change the key:
> "SlaveDeviceTimingMode"=dword:00008010 which is UDMA.
>
> You could also export the Key above, and just make the necessary
> changes to
> "MasterDeviceTimingMode"
> "MasterDeviceTimingModeAllowed"
> "UserMasterDeviceTimingModeAllowed"
> and leave the slave at it's present settings, then save it as a REG
> file.
>
> Once you have done this, then run the REG file, it will ask you
> whether you want add the information to the registry, when you answer
> YES, you will get a onfirmation, that the information has been added
> to the registry, and then the lextor is in DMA mode again .... until
> next time it decides to go into PIO ode. I have a copy of DMA_ON.reg
> on my desktop, and I use it if the Plextor is in PIO mode, the change
> happens 'on the fly', no need to reboot.
>
> Sorry I didn't have a permanent solution, hope this makes the pain
> easier to live with, until someone comes with a BIOS upgrade, IDE
> Driver or system patch, which permanently solves the problem.
>
> I DO know that once Windows XP decides that the Plextor is only PIO
> mode capable, then nothing 'normal' will pursuade it otherwise. But if
> it's a fault on Windows side, or that the Plextor gives wrong
> information to Windows about it self, or the IDE drivers reports the
> wrong settings - I don't know.
>
> I've noticed, that upgrades of the Plextor Bios and IDE drivers cause
> a new scan of hardware, and the Plextor once again becomes DMA, but
> once it's set to PIO with these drivers, then Windows remember this
> setting and won't let you change it normally.
>
> So even downgrading the BIOS won't reset it to DMA, if Windows once
> has decided that with this BIOS it's only PIO capable, or with these
> drivers it's only PIO capable, then 'it's forever'!!
>
> Regards Leif
>


.

Relevant Pages

  • Re: Dma mode has reverted to Pio mode..Please Help...:o)
    ... Many thanks for your Reply Nigel ive been through this workaround before i ... > enable DMA mode. ... so the Plextor wasDMA and the CD was PIO. ...
    (microsoft.public.windowsxp.general)
  • Re: Dma mode has reverted to Pio mode..Please Help...:o)
    ... >I have googled the prob and found that the prob is Dma mode has reverted to ... I had an Asus K7M board, I had The Plextor 12/10/32a as primary on the ... so the Plextor wasDMA and the CD was PIO. ... I DO know that once Windows XP decides that the Plextor is only PIO ...
    (microsoft.public.windowsxp.general)
  • Re: Impossible to enable DMA- Tried Everything.
    ... Most people have problems burning CD's, when DMA in on, however a few ... I had an Asus K7M board, I had The Plextor 12/10/32a as primary on the ... DMA and the CD was PIO. ... I DO know that once Windows 2000 decides that the Plextor is only PIO ...
    (alt.comp.periphs.mainboard.asus)
  • Re: General system slow down issue
    ... -While you are checking DMA / PIO, you might set the Write Caching to ON and any other performance enhancements offered ... -Note that Windows optimizes application start up. ... -Check Services in Vista to see if some third party software has installed some indexing etc. service. ...
    (microsoft.public.windows.vista.general)
  • Re: Impossible to enable DMA- Tried Everything.
    ... changing more to DMA can occur automatically in Windows if there are IO ... at switches to PIO mode apparently on it's own. ... > I had an Asus K7M board, I had The Plextor 12/10/32a as primary on the ...
    (alt.comp.periphs.mainboard.asus)