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From: Guilherme Moro on 4 Dec 2009 07:22
hello,

I have a virtual ( net backed ) disk drive, and everytime I boot from
this disk I got a "Your System Has No Paging File, or the Paging File
Is Too Small" error, and windows create a temporary pagefile
somewhere.

Windows cant create the pagefile.sys, but I dont know why, someone
told me about user permissions, but everything looks just fine with
the permissions.

I search around, even in the Windows Internals book, but cant find a
decent explanation of the process of creation of the pagefile, to
figure out what the problem is.

Anyone has any ideas?

Guilherme
From: AMV on 5 Dec 2009 04:24


"Guilherme Moro" wrote:

> hello,
>
> I have a virtual ( net backed ) disk drive, and everytime I boot from
> this disk I got a "Your System Has No Paging File, or the Paging File
> Is Too Small" error, and windows create a temporary pagefile
> somewhere.
>
> Windows cant create the pagefile.sys, but I dont know why, someone
> told me about user permissions, but everything looks just fine with
> the permissions.
>
> I search around, even in the Windows Internals book, but cant find a
> decent explanation of the process of creation of the pagefile, to
> figure out what the problem is.
>
> Anyone has any ideas?
>
> Guilherme
> .
>
1. probably pagefiles can't be on virtual disks
2. disk driver loaded much more later, than system need for pagefile,
in this case you can manually add, for example (1900-4000 Mb on z:):
CSCRIPT //B //NoLogo "pagefileconfig.vbs" /Create /I 1900 /M 4000 /VO z:
From: Guilherme Moro on 7 Dec 2009 14:13
But why it cant be on a virtual drive?
Who creates the pagefile and when? this information need to be
somewhere.

If the pagefile is created direct by the system talking direct to the
last driver (with no filters and others devices in the stack), is
there a way to know when this occur?

Guilherme

On Dec 5, 7:24 am, AMV <A...(a)discussions.microsoft.com> wrote:
> "Guilherme Moro" wrote:
> > hello,
>
> > I have a virtual ( net backed ) disk drive, and everytime I boot from
> > this disk I got a "Your System Has No Paging File, or the Paging File
> > Is Too Small" error, and windows create a temporarypagefile
> > somewhere.
>
> > Windows cant create thepagefile.sys, but I dont know why, someone
> > told me about user permissions, but everything looks just fine with
> > the permissions.
>
> > I search around, even in the Windows Internals book, but cant find a
> > decent explanation of the process of creation of thepagefile, to
> > figure out what the problem is.
>
> > Anyone has any ideas?
>
> > Guilherme
> > .
>
> 1. probably pagefiles can't be on virtual disks
> 2. disk driver loaded much more later, than system need forpagefile,
>    in this case you can manually add, for example (1900-4000 Mb on z:):
>   CSCRIPT //B //NoLogo "pagefileconfig.vbs" /Create /I 1900 /M 4000 /VO z:

From: Don Burn on 7 Dec 2009 14:23
Pagefiles have to be on disks that support them. For one thing take a look
at IRP_MN_DEVICE_USAGE_NOTIFICATION is you are not handling it you will not
be able to support paging. There is nothing about disk driver being loaded
later, the paging file is created through the file system which is loaded
onto the disk driver, so certainly is not the problem.


--
Don Burn (MVP, Windows DKD)
Windows Filesystem and Driver Consulting
Website: http://www.windrvr.com
Blog: http://msmvps.com/blogs/WinDrvr
Remove StopSpam to reply



"AMV" <AMV(a)discussions.microsoft.com> wrote in message
news:BC7E18C8-1634-4ED9-B910-A688F26FF18F(a)microsoft.com...
>
>
> "Guilherme Moro" wrote:
>
>> hello,
>>
>> I have a virtual ( net backed ) disk drive, and everytime I boot from
>> this disk I got a "Your System Has No Paging File, or the Paging File
>> Is Too Small" error, and windows create a temporary pagefile
>> somewhere.
>>
>> Windows cant create the pagefile.sys, but I dont know why, someone
>> told me about user permissions, but everything looks just fine with
>> the permissions.
>>
>> I search around, even in the Windows Internals book, but cant find a
>> decent explanation of the process of creation of the pagefile, to
>> figure out what the problem is.
>>
>> Anyone has any ideas?
>>
>> Guilherme
>> .
>>
> 1. probably pagefiles can't be on virtual disks
> 2. disk driver loaded much more later, than system need for pagefile,
> in this case you can manually add, for example (1900-4000 Mb on z:):
> CSCRIPT //B //NoLogo "pagefileconfig.vbs" /Create /I 1900 /M 4000 /VO z:
>
> __________ Information from ESET NOD32 Antivirus, version of virus
> signature database 4661 (20091204) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
>



__________ Information from ESET NOD32 Antivirus, version of virus signature database 4668 (20091207) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com




From: Guilherme Moro on 8 Dec 2009 08:09
Ok, you hit the exact point, with your hint I found the solution.
WDF turn off support for special files by default, I need to call
WdfDeviceSetSpecialFileSupport for both the Bus FDO and the child PDO,
so the framework handle the IRP_MN_DEVICE_USAGE_NOTIFICATION
correctly.

Many thanks!

Guilherme Moro

On Dec 7, 5:23 pm, "Don Burn" <b...(a)stopspam.windrvr.com> wrote:
> Pagefiles have to be on disks that support them.  For one thing take a look
> at IRP_MN_DEVICE_USAGE_NOTIFICATION is you are not handling it you will not
> be able to support paging.   There is nothing about disk driver being loaded
> later, the paging file is created through the file system which is loaded
> onto the disk driver, so certainly is not the problem.
>
> --
> Don Burn (MVP, Windows DKD)
> Windows Filesystem and Driver Consulting
> Website:http://www.windrvr.com
> Blog:http://msmvps.com/blogs/WinDrvr
> Remove StopSpam to reply
>
> "AMV" <A...(a)discussions.microsoft.com> wrote in message
>
> news:BC7E18C8-1634-4ED9-B910-A688F26FF18F(a)microsoft.com...
>
>
>
>
>
> > "Guilherme Moro" wrote:
>
> >> hello,
>
> >> I have a virtual ( net backed ) disk drive, and everytime I boot from
> >> this disk I got a "Your System Has No Paging File, or the Paging File
> >> Is Too Small" error, and windows create a temporarypagefile
> >> somewhere.
>
> >> Windows cant create thepagefile.sys, but I dont know why, someone
> >> told me about user permissions, but everything looks just fine with
> >> the permissions.
>
> >> I search around, even in the Windows Internals book, but cant find a
> >> decent explanation of the process of creation of thepagefile, to
> >> figure out what the problem is.
>
> >> Anyone has any ideas?
>
> >> Guilherme
> >> .
>
> > 1. probably pagefiles can't be on virtual disks
> > 2. disk driver loaded much more later, than system need forpagefile,
> >   in this case you can manually add, for example (1900-4000 Mb on z:):
> >  CSCRIPT //B //NoLogo "pagefileconfig.vbs" /Create /I 1900 /M 4000 /VO z:
>
> > __________ Information from ESET NOD32 Antivirus, version of virus
> > signature database 4661 (20091204) __________
>
> > The message was checked by ESET NOD32 Antivirus.
>
> >http://www.eset.com
>
> __________ Information from ESET NOD32 Antivirus, version of virus signature database 4668 (20091207) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com

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