[XP] disk class filter & FAT32

Hi,

I recently wrote a disk class upper filter driver. It starts at boot time!

The very strange problem is that it is somehow dependent on
the file system of the host system.

case 1:
WinXP is on a NTFS partition -> no problems at all

case 2:
WinXP is on a FAT32 partition -> I get 0x0000007b meaning
INACCESSIBLE_BOOT_DEVICE.

Since the filter only acts on disk class devices it shouldn't depend
on the filesystem, right?

Any ideas about that?

regards
M.O.

Alexei
Sun May 02 23:04:09 CDT 2004

Is the name of your driver file a valid 8.3 DOS name?

Alexei.

"Morton Ohlson" <spam@traxbyte.de> wrote in message
news:OtTix72LEHA.3052@TK2MSFTNGP12.phx.gbl...
> Hi,
>
> I recently wrote a disk class upper filter driver. It starts at boot time!
>
> The very strange problem is that it is somehow dependent on
> the file system of the host system.
>
> case 1:
> WinXP is on a NTFS partition -> no problems at all
>
> case 2:
> WinXP is on a FAT32 partition -> I get 0x0000007b meaning
> INACCESSIBLE_BOOT_DEVICE.
>
> Since the filter only acts on disk class devices it shouldn't depend
> on the filesystem, right?
>
> Any ideas about that?
>
> regards
> M.O.

Morton
Mon May 03 04:37:26 CDT 2004

Hey Alexei,

that might be it. I never thought of that!!
Checking...

best regards
M.O.


Alexei Jelvis wrote:
> Is the name of your driver file a valid 8.3 DOS name?
>
> Alexei.
>
> "Morton Ohlson" <spam@traxbyte.de> wrote in message
> news:OtTix72LEHA.3052@TK2MSFTNGP12.phx.gbl...
>
>>Hi,
>>
>>I recently wrote a disk class upper filter driver. It starts at boot time!
>>
>>The very strange problem is that it is somehow dependent on
>>the file system of the host system.
>>
>>case 1:
>>WinXP is on a NTFS partition -> no problems at all
>>
>>case 2:
>>WinXP is on a FAT32 partition -> I get 0x0000007b meaning
>>INACCESSIBLE_BOOT_DEVICE.
>>
>>Since the filter only acts on disk class devices it shouldn't depend
>>on the filesystem, right?
>>
>>Any ideas about that?
>>
>>regards
>> M.O.
>
>
>

Morton
Tue May 04 10:06:33 CDT 2004

Perfect!
That solved it. I certainly won't forget that.

M.0.

Alexei Jelvis wrote:
> Is the name of your driver file a valid 8.3 DOS name?
>
> Alexei.
>
> "Morton Ohlson" <spam@traxbyte.de> wrote in message
> news:OtTix72LEHA.3052@TK2MSFTNGP12.phx.gbl...
>
>>Hi,
>>
>>I recently wrote a disk class upper filter driver. It starts at boot time!
>>
>>The very strange problem is that it is somehow dependent on
>>the file system of the host system.
>>
>>case 1:
>>WinXP is on a NTFS partition -> no problems at all
>>
>>case 2:
>>WinXP is on a FAT32 partition -> I get 0x0000007b meaning
>>INACCESSIBLE_BOOT_DEVICE.
>>
>>Since the filter only acts on disk class devices it shouldn't depend
>>on the filesystem, right?
>>
>>Any ideas about that?
>>
>>regards
>> M.O.
>
>
>