Re: Impossible to enable DMA- Tried Everything.

changing more to DMA can occur automatically in Windows if there are IO
problems talking to the disc drive (not IO issues with the disc). E.G. when
there is a shoddy cable.

Try a different cable.

Check your BIOS settings.


"Leif Nordmand Andersen" <lna@xxxxxxxxxxxxx> wrote in message
news:qtp3k1tp1os6833sibee622gq9v8c7qrnv@xxxxxxxxxx
> Hi Steve,
>
>> Device Type: Auto Detection
>> Transfer Mode: DMA If Available
>> Current Transfer Mode: Not Applicable
>
> I've had a similar problem, I have made this to help people along :
>
>
>
>
> Most people have problems burning CD's, when DMA in on, however a few
> of us
> burns fine with DMA on, however we experience, that the computer has a
> mind of
> it's own, at switches to PIO mode apparently on it's own.
>
> 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
> secondary
> channel, and a CD as slave on the secondary channel. On this setup I
> couldn't
> run both as DMA, the system would freeze during operation, so the
> Plextor was
> DMA 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
> to add the information to the registry, when you answer YES, you will
> get a
> confirmation, that the information has been added to the registry, and
> then the
> Plextor is in DMA mode again .... until next time it decides to go
> into PIO
> mode. 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 2000 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'!!
>
>
>


.

Relevant Pages

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