Re: Mass storage class failing during enumeration.

From: Dean Ramsier (ramsiernospam_at_nospam.com)
Date: 02/28/05 

Date: Mon, 28 Feb 2005 16:17:14 -0500

You could create a RAM drive, and expose that. There is a sample driver in
the Public\Common directory. 

-- 
Dean Ramsier - eMVP
"Rams" <Rams@discussions.microsoft.com> wrote in message
news:4531BCFE-B61C-4FE5-BDC3-FE4D9FFB4081@microsoft.com...
> Hi Adam,
>
>       Thanks for the reply. Can we expose RAM as the device? If yes, then
> what name should be given for the "DeviceName"?
> What is the usual way of exposing the device memory and what is the
> "DeviceName" that is given in the registry entry.
> Our current scenario is that we dont have a HDD in our system. We only
have
> RAM and flash. How do we go about it?
> When connected in serial class, I can explore the filesystem in the mobile
> device from the host. Let me know how to go about it in my current
scenario.
>
> Rgds,
> Rams.
>
>
>
> "Adam Kodeda [MS]" wrote:
>
> > The USB Mass Storage Function driver exposes a resident store to the USB
> > host.  That is, it allows a CE-based device to appear as a USB Mass
Storage
> > device to a USB host.  The "DeviceName" registry value is the name of
the
> > resident store to expose.  The default USB Mass Storage Function
registry
> > settings assume that you wish to expose the store labeled "DSK1:"  Does
your
> > CE-based device contain a storage device to expose (e.g., ATA hard
disk)?
> >
> > -- 
> > Adam Kodeda [MS]
> > This posting is provided "AS IS" with no warranties, and confers no
rights.
> >
> >
> > "Rams" <Rams@discussions.microsoft.com> wrote in message
> > news:3F69995D-F8F4-41D7-9FC4-010E497BD05F@microsoft.com...
> > > During enumeration of USB function controller driver when the class
driver
> > > is
> > > mass storage, it is failing after the "OpenStore" function call with
debug
> > > msg as "UsbMsFn!STORE_Init: failed to open store DSK1:; error = 4319".
I
> > > found that it was failing when it called CreateFile. It was trying to
> > > create
> > > a file at "\StoreMgr\DSK1:" but returned back with 0xfffffff as error
> > > value.
> > > The registry settings in my platform.reg file are as follows:
> > > =================================
> > > ; @CESYSGEN IF CE_MODULES_USBMSFN
> > > [HKEY_LOCAL_MACHINE\Drivers\USB\FunctionDrivers]
> > >   "DefaultClientDriver"=- ; erase previous default
> > > [HKEY_LOCAL_MACHINE\Drivers\USB\FunctionDrivers]
> > >   "DefaultClientDriver"="Mass_Storage_Class"
> > >
> > > [HKEY_LOCAL_MACHINE\Drivers\USB\FunctionDrivers\Mass_Storage_Class]
> > >   "Dll"="usbmsfn.dll"
> > >   "InterfaceSubClass"=dword:06
> > >   "InterfaceProtocol"=dword:50
> > >   "DeviceName"="DSK1:"
> > >   "FriendlyName"="Mass Storage"
> > > ; idVendor must be changed. 045E belongs to Microsoft and is only to
be
> > > used
> > > for
> > > ; prototype devices in your labs. Visit http://www.usb.org to obtain a
> > > vendor id.
> > >   "idVendor"=dword:045E
> > >   "Manufacturer"="Generic Manufacturer (PROTOTYPE--Remember to change
> > > idVendor)"
> > >   "idProduct"=dword:FFFF
> > >   "Product"="Generic Mass Storage (PROTOTYPE--Remember to change
> > > idVendor)"
> > >   "bcdDevice"=dword:0
> > > ; @CESYSGEN ENDIF CE_MODULES_USBMSFN
> > > ==================================
> > > Let me know why it is failing while creating the file DSK1: in
StoreMgr.
> > >
> > > Rgds,
> > > Rams.
> >
> >
> >

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