Problem when direct read harddrive

NTFSD
1

Hello All,

There are some issue that need your help and advice:

When I try to access the harddrive directly to get some information from MBR, I always get a problem with IoCreateFile. It will retrun STATUS_OBJECT_PATH_NOT_FOUND.

However, this code works ok during the term of debugging, when I logon as administrator and start the driver service manually.

Part of codes as following:

//===================
RtlInitUnicodeString (&ustrDevName, L"\Device\Harddisk0\DR0");
InitializeObjectAttributes (&ObjAttr, &ustrDevName, OBJ_CASE_INSENSITIVE , NULL, NULL);

Status = IoCreateFile (&FileHandle, GENERIC_READ, &ObjAttr, &IOStatusBlk, NULL, FILE_ATTRIBUTE_NORMAL,
FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_OPEN,
FILE_NON_DIRECTORY_FILE |FILE_SYNCHRONOUS_IO_NONALERT,
NULL, 0, CreateFileTypeNone, NULL, IO_NO_PARAMETER_CHECKING);
DbgPrint((“NWF!GetMBRInfo: IoCreateFile result "%wZ", Status=%08x\n”, &ustrDevName, Status));
//====================

Thanks for any kind of help:)

2

Try ??\PhysicalDrive0

–
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
xxxxx@storagecraft.com
http://www.storagecraft.com

wrote in message news:xxxxx@ntfsd…
> Hello All,
>
> There are some issue that need your help and advice:
>
> When I try to access the harddrive directly to get some information from MBR,
I always get a problem with IoCreateFile. It will retrun
STATUS_OBJECT_PATH_NOT_FOUND.
>
> However, this code works ok during the term of debugging, when I logon as
administrator and start the driver service manually.
>
> Part of codes as following:
>
> //===================
> RtlInitUnicodeString (&ustrDevName,
L"\Device\Harddisk0\DR0");
> InitializeObjectAttributes (&ObjAttr, &ustrDevName, OBJ_CASE_INSENSITIVE ,
NULL, NULL);
>
> Status = IoCreateFile (&FileHandle, GENERIC_READ, &ObjAttr, &IOStatusBlk,
NULL, FILE_ATTRIBUTE_NORMAL,
> FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_OPEN,
> FILE_NON_DIRECTORY_FILE |FILE_SYNCHRONOUS_IO_NONALERT,
> NULL, 0, CreateFileTypeNone, NULL, IO_NO_PARAMETER_CHECKING);
> DbgPrint((“NWF!GetMBRInfo: IoCreateFile result "%wZ", Status=%08x\n”,
&ustrDevName, Status));
> //====================
>
> Thanks for any kind of help:)
>

3

Thanks, but the result is same.

Is there any other executions that need to be loaded ahead so that the device can be located by it’s object name?

4

Oh, this time, the call will return STATUS_OBJECT_NAME_NOT_FOUND, instead of STATUS_OBJECT_PATH_NOT_FOUND.