How to access the raw partition from filter driver

NTFSD
1

Hi , this is mrunal from Pune Institute Of Computer Technology.
I m trying to access raw partition in windows2000 from my filter driver which lies below NTFS drivers and above disk drivers. I tried ZwCreateFile call but it is returning FILE_SUPERSEDED in IoStatus. Wht does it mean?
Help me as soon as possible I need it in my Under Graduate Project.

Regards
Mrunal Rege

Jiyo cricket on Yahoo! India cricket
Yahoo! Messenger Mobile Stay in touch with your buddies all the time.

2

PLEASE DON’T CROSS POST.

If you’re gonna post to the list the first day you join (which is never a good idea), at least have the common decency to read the list FAQ before posting.

Arrrgh…

Peter
OSR

3

Mrunal,

if you are not done yet, here’s a working snippet.
Look at sharing flags.

HANDLE FileHandle = 0;
NTSTATUS OpenRaw() {
UNICODE_STRING FileName;
NTSTATUS ntStatus;
OBJECT_ATTRIBUTES ObjectAttributes;
WCHAR PathPrefix = L"\Device\Harddisk0\Partition1";
//ULONG FileNameLength;
IO_STATUS_BLOCK IoStatus;
RtlInitUnicodeString(&FileName, PathPrefix);
InitializeObjectAttributes(&ObjectAttributes, &FileName,
OBJ_CASE_INSENSITIVE, NULL, NULL);
ntStatus = ZwCreateFile(&FileHandle,
FILE_READ_DATA | FILE_WRITE_DATA,
&ObjectAttributes,
&IoStatus,
NULL,
FILE_ATTRIBUTE_NORMAL,
//0, // ntStatus = 0xC0000043L = STATUS_SHARING_VIOLATION
FILE_SHARE_READ | FILE_SHARE_WRITE, // ntStatus = 0, FileHandle = 0x400 or 0x208 etc.
FILE_OPEN_IF,
FILE_NON_DIRECTORY_FILE,
NULL, 0);
return ntStatus;
}

----- Original Message -----
From: yuvraj rege
To: Windows File Systems Devs Interest List
Sent: Friday, March 03, 2006 1:13 PM
Subject: [ntfsd] How to access the raw partition from filter driver

Hi , this is mrunal from Pune Institute Of Computer Technology.
I m trying to access raw partition in windows2000 from my filter driver which lies below NTFS drivers and above disk drivers. I tried ZwCreateFile call but it is returning FILE_SUPERSEDED in IoStatus. Wht does it mean?
Help me as soon as possible I need it in my Under Graduate Project.

Regards
Mrunal Rege

Jiyo cricket on Yahoo! India cricket
Yahoo! Messenger Mobile Stay in touch with your buddies all the time. — Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17 You are currently subscribed to ntfsd as: xxxxx@bellsouth.net To unsubscribe send a blank email to xxxxx@lists.osr.com

4

Hello Sir,
Thank you for your kind help!
I have tried path name as “\Device\Harddisk0\Partition1”
but it is working only for formatted partitions. When I tried this on formatted
partition I got STATUS_SUCCESS but as soon as I made the patition unformatted using ‘Partition Magic’ software it returned me
STATUS_INVALID_PARAMETER . Why this is? If my driver is below file system
drivers where “DiskPerf” exists then it should not behave with the formatted and unformatted partition distinctly , I think.
Is ZwCreateFile suitable for only formatted partitions? Is there any other way to access unformatted partition?

Best Regards

Mrunal

“xxxxx@Home” wrote: Mrunal,

if you are not done yet, here’s a working snippet.
Look at sharing flags.

HANDLE FileHandle = 0;
NTSTATUS OpenRaw() {
UNICODE_STRING FileName;
NTSTATUS ntStatus;
OBJECT_ATTRIBUTES ObjectAttributes;
WCHAR PathPrefix = L"\Device\Harddisk0\Partition1";
//ULONG FileNameLength;
IO_STATUS_BLOCK IoStatus;
RtlInitUnicodeString(&FileName, PathPrefix);
InitializeObjectAttributes(&ObjectAttributes, &FileName,
OBJ_CASE_INSENSITIVE, NULL, NULL);
ntStatus = ZwCreateFile(&FileHandle,
FILE_READ_DATA | FILE_WRITE_DATA,
&ObjectAttributes,
&IoStatus,
NULL,
FILE_ATTRIBUTE_NORMAL,
//0, // ntStatus = 0xC0000043L = STATUS_SHARING_VIOLATION
FILE_SHARE_READ | FILE_SHARE_WRITE, // ntStatus = 0, FileHandle = 0x400 or 0x208 etc.
FILE_OPEN_IF,
FILE_NON_DIRECTORY_FILE,
NULL, 0);
return ntStatus;
}

----- Original Message -----
From: yuvraj rege
To: Windows File Systems Devs Interest List
Sent: Friday, March 03, 2006 1:13 PM
Subject: [ntfsd] How to access the raw partition from filter driver

Hi , this is mrunal from Pune Institute Of Computer Technology.
I m trying to access raw partition in windows2000 from my filter driver which lies below NTFS drivers and above disk drivers. I tried ZwCreateFile call but it is returning FILE_SUPERSEDED in IoStatus. Wht does it mean?
Help me as soon as possible I need it in my Under Graduate Project.

Regards
Mrunal Rege

---------------------------------
Jiyo cricket on Yahoo! India cricket
Yahoo! Messenger Mobile Stay in touch with your buddies all the time. — Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17 You are currently subscribed to ntfsd as: xxxxx@bellsouth.net To unsubscribe send a blank email to xxxxx@lists.osr.com
—
Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com

---------------------------------
Jiyo cricket on Yahoo! India cricket
Yahoo! Messenger Mobile Stay in touch with your buddies all the time.

5

Touch the partition, trigger mount processing. Thus, my guess is that
it is RAW that returns this error. RAW only supports non-cached I/O to
the volume.

Regards,

Tony

Tony Mason

Consulting Partner

OSR Open Systems Resources, Inc.

http://www.osr.com

Looking forward to seeing you at the next OSR File Systems class in
Boston, MA April 18-21, 2006 (note new date - MS scheduled plugfest the
same week again.)

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of yuvraj rege
Sent: Monday, March 06, 2006 12:37 PM
To: ntfsd redirect
Subject: Re: [ntfsd] How to access the raw partition from filter driver

Hello Sir,
Thank you for your kind help!
I have tried path name as "\Device\Harddisk0\Partition1
<file:> “
but it is working only for formatted partitions. When I tried this on
formatted
partition I got STATUS_SUCCESS but as soon as I made the patition
unformatted using ‘Partition Magic’ software it returned me
STATUS_INVALID_PARAMETER . Why this is? If my driver is below file
system
drivers where “DiskPerf” exists then it should not behave with the
formatted and unformatted partition distinctly , I think.
Is ZwCreateFile suitable for only formatted partitions? Is there
any other way to access unformatted partition?

Best Regards

Mrunal

“xxxxx@Home” wrote:

Mrunal,

if you are not done yet, here’s a working snippet.

Look at sharing flags.

HANDLE FileHandle = 0;
NTSTATUS OpenRaw() {
UNICODE_STRING FileName;
NTSTATUS ntStatus;
OBJECT_ATTRIBUTES ObjectAttributes;
WCHAR PathPrefix = L”\Device\Harddisk0\Partition1
<file:> ";
//ULONG FileNameLength;
IO_STATUS_BLOCK IoStatus;
RtlInitUnicodeString(&FileName, PathPrefix);
InitializeObjectAttributes(&ObjectAttributes, &FileName,
OBJ_CASE_INSENSITIVE, NULL, NULL);
ntStatus = ZwCreateFile(&FileHandle,
FILE_READ_DATA | FILE_WRITE_DATA,
&ObjectAttributes,
&IoStatus,
NULL,
FILE_ATTRIBUTE_NORMAL,
//0, // ntStatus = 0xC0000043L =
STATUS_SHARING_VIOLATION
FILE_SHARE_READ | FILE_SHARE_WRITE, // ntStatus = 0,
FileHandle = 0x400 or 0x208 etc.
FILE_OPEN_IF,
FILE_NON_DIRECTORY_FILE,
NULL, 0);
return ntStatus;
}

----- Original Message -----

From: yuvraj rege mailto:xxxxx

To: Windows File Systems Devs Interest List
mailto:xxxxx

Sent: Friday, March 03, 2006 1:13 PM

Subject: [ntfsd] How to access the raw partition from filter
driver

Hi , this is mrunal from Pune Institute Of Computer Technology.

I m trying to access raw partition in windows2000 from my filter
driver which lies below NTFS drivers and above disk drivers. I tried
ZwCreateFile call but it is returning FILE_SUPERSEDED in IoStatus. Wht
does it mean?

Help me as soon as possible I need it in my Under Graduate
Project.

Regards

Mrunal Rege



Jiyo cricket on Yahoo! India cricket
http:ricket/>
Yahoo! Messenger Mobile
http:oo.com/new/messenger/> Stay in touch with your buddies all the time.
— Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17 You are currently subscribed
to ntfsd as: xxxxx@bellsouth.net To unsubscribe send a blank email to
xxxxx@lists.osr.com

—
Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument:
‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com



Jiyo cricket on Yahoo! India cricket
http:ricket/>
Yahoo! Messenger Mobile
http:oo.com/new/messenger/> Stay in touch with your buddies all the time.
— Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17 You are currently subscribed
to ntfsd as: xxxxx@osr.com To unsubscribe send a blank email to
xxxxx@lists.osr.com</http:></http:></http:></http:></mailto:xxxxx></mailto:xxxxx></file:></file:>

6

Is this true that ZwCreateFile or ZwReadFile/ZwWriteFile works only for the recognised/formatted partitions?
Can’t I use these functions with unformatted partitions?
Please tell me if there is any other way for accessing unformatted partitions?
I want to use unformatted partition as a nonvolatile buffer for I/O operations in my filter driver. Actually I want to avoid the overhead of seek and latencies
causes due to fragmentation of partitions.Thats why I want to use unformatted contiguous space in the harddisk.

Regards

Mrunal Rege

From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of yuvraj rege
Sent: Monday, March 06, 2006 12:37 PM
To: ntfsd redirect
Subject: Re: [ntfsd] How to access the raw partition from filter driver

Hello Sir,
Thank you for your kind help!
I have tried path name as “\Device\Harddisk0\Partition1”
but it is working only for formatted partitions. When I tried this on formatted
partition I got STATUS_SUCCESS but as soon as I made the patition unformatted using ‘Partition Magic’ software it returned me
STATUS_INVALID_PARAMETER . Why this is? If my driver is below file system
drivers where “DiskPerf” exists then it should not behave with the formatted and unformatted partition distinctly , I think.
Is ZwCreateFile suitable for only formatted partitions? Is there any other way to access unformatted partition?

Best Regards

Mrunal

“xxxxx@Home” wrote:
Mrunal,

if you are not done yet, here’s a working snippet.

Look at sharing flags.

HANDLE FileHandle = 0;
NTSTATUS OpenRaw() {
UNICODE_STRING FileName;
NTSTATUS ntStatus;
OBJECT_ATTRIBUTES ObjectAttributes;
WCHAR PathPrefix = L"\Device\Harddisk0\Partition1";
//ULONG FileNameLength;
IO_STATUS_BLOCK IoStatus;
RtlInitUnicodeString(&FileName, PathPrefix);
InitializeObjectAttributes(&ObjectAttributes, &FileName,
OBJ_CASE_INSENSITIVE, NULL, NULL);
ntStatus = ZwCreateFile(&FileHandle,
FILE_READ_DATA | FILE_WRITE_DATA,
&ObjectAttributes,
&IoStatus,
NULL,
FILE_ATTRIBUTE_NORMAL,
//0, // ntStatus = 0xC0000043L = STATUS_SHARING_VIOLATION
FILE_SHARE_READ | FILE_SHARE_WRITE, // ntStatus = 0, FileHandle = 0x400 or 0x208 etc.
FILE_OPEN_IF,
FILE_NON_DIRECTORY_FILE,
NULL, 0);
return ntStatus;
}

----- Original Message -----

From: yuvraj rege

To: Windows File Systems Devs Interest List

Sent: Friday, March 03, 2006 1:13 PM

Subject: [ntfsd] How to access the raw partition from filter driver

Hi , this is mrunal from Pune Institute Of Computer Technology.

I m trying to access raw partition in windows2000 from my filter driver which lies below NTFS drivers and above disk drivers. I tried ZwCreateFile call but it is returning FILE_SUPERSEDED in IoStatus. Wht does it mean?

Help me as soon as possible I need it in my Under Graduate Project.

Regards

Mrunal Rege

---------------------------------

Jiyo cricket on Yahoo! India cricket
Yahoo! Messenger Mobile Stay in touch with your buddies all the time. — Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17 You are currently subscribed to ntfsd as: xxxxx@bellsouth.net To unsubscribe send a blank email to xxxxx@lists.osr.com

—
Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com

---------------------------------

Jiyo cricket on Yahoo! India cricket
Yahoo! Messenger Mobile Stay in touch with your buddies all the time. — Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17 You are currently subscribed to ntfsd as: xxxxx@osr.com To unsubscribe send a blank email to xxxxx@lists.osr.com

—
Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com

---------------------------------
Jiyo cricket on Yahoo! India cricket
Yahoo! Messenger Mobile Stay in touch with your buddies all the time.

7

yuvraj,

Peter, OSR’s founder, has already asked you to stop cross posting. In
case you forgot what he told you, here it is again:

m.

yuvraj rege wrote:

Is this true that ZwCreateFile or ZwReadFile/ZwWriteFile works only
for the recognised/formatted partitions?
Can’t I use these functions with unformatted partitions?
Please tell me if there is any other way for accessing unformatted
partitions?
I want to use unformatted partition as a nonvolatile buffer for I/O
operations in my filter driver. Actually I want to avoid the overhead
of seek and latencies
causes due to fragmentation of partitions.Thats why I want to use
unformatted contiguous space in the harddisk.

Regards

Mrunal Rege

*From:* xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] *On Behalf Of *yuvraj rege
*Sent:* Monday, March 06, 2006 12:37 PM
*To:* ntfsd redirect
*Subject:* Re: [ntfsd] How to access the raw partition from filter
driver

Hello Sir,
Thank you for your kind help!
I have tried path name as “\Device\Harddisk0\Partition1
<file:></file:>”
but it is working only for formatted partitions. When I tried this
on formatted
partition I got STATUS_SUCCESS but as soon as I made the
patition unformatted using ‘Partition Magic’ software it returned me
STATUS_INVALID_PARAMETER . Why this is? If my driver is below file
system
drivers where “DiskPerf” exists then it should not behave with the
formatted and unformatted partition distinctly , I think.
Is ZwCreateFile suitable for only formatted partitions? Is
there any other way to access unformatted partition?

Best Regards

Mrunal

*/“xxxxx@Home” /* wrote:
> Mrunal,
>
> if you are not done yet, here’s a working snippet.
> Look at sharing flags.
>
> HANDLE FileHandle = 0;
> NTSTATUS OpenRaw() {
> UNICODE_STRING FileName;
> NTSTATUS ntStatus;
> OBJECT_ATTRIBUTES ObjectAttributes;
> WCHAR PathPrefix = L"\Device\Harddisk0\Partition1
> <file:></file:>";
> //ULONG FileNameLength;
> IO_STATUS_BLOCK IoStatus;
> RtlInitUnicodeString(&FileName, PathPrefix);
> InitializeObjectAttributes(&ObjectAttributes, &FileName,
> OBJ_CASE_INSENSITIVE, NULL, NULL);
> ntStatus = ZwCreateFile(&FileHandle,
> FILE_READ_DATA | FILE_WRITE_DATA,
> &ObjectAttributes,
> &IoStatus,
> NULL,
> FILE_ATTRIBUTE_NORMAL,
> //0, // ntStatus = 0xC0000043L =
> STATUS_SHARING_VIOLATION
> FILE_SHARE_READ | FILE_SHARE_WRITE, // ntStatus = 0,
> FileHandle = 0x400 or 0x208 etc.
> FILE_OPEN_IF,
> FILE_NON_DIRECTORY_FILE,
> NULL, 0);
> return ntStatus;
> }
>
> ----- Original Message -----
> From: yuvraj rege mailto:xxxxx
> To: Windows File Systems Devs Interest List
> mailto:xxxxx
> Sent: Friday, March 03, 2006 1:13 PM
> Subject: [ntfsd] How to access the raw partition from filter
> driver
>
> Hi , this is mrunal from Pune Institute Of Computer Technology.
> I m trying to access raw partition in windows2000 from my
> filter driver which lies below NTFS drivers and above disk
> drivers. I tried ZwCreateFile call but it is returning
> FILE_SUPERSEDED in IoStatus. Wht does it mean?
> Help me as soon as possible I need it in my Under Graduate
> Project.
>
>
> Regards
> Mrunal Rege
> ------------------------------------------------------------------------
> Jiyo cricket on Yahoo! India cricket
> http:</http:>
> Yahoo! Messenger Mobile
> http:</http:>
> Stay in touch with your buddies all the time. — Questions?
> First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17 You are currently
> subscribed to ntfsd as: xxxxx@bellsouth.net To unsubscribe
> send a blank email to xxxxx@lists.osr.com
>
>
> —
> Questions? First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: unknown lmsubst tag
> argument: ‘’
> To unsubscribe send a blank email to
> xxxxx@lists.osr.com
>
> ------------------------------------------------------------------------
> Jiyo cricket on Yahoo! India cricket
> http:</http:>
> Yahoo! Messenger Mobile
> http:</http:>
> Stay in touch with your buddies all the time. — Questions? First
> check the IFS FAQ at https://www.osronline.com/article.cfm?id=17
> You are currently subscribed to ntfsd as: xxxxx@osr.com To
> unsubscribe send a blank email to xxxxx@lists.osr.com
>
> —
> Questions? First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: unknown lmsubst tag
> argument: ‘’
> To unsubscribe send a blank email to
> xxxxx@lists.osr.com
>
>
> ------------------------------------------------------------------------
> Jiyo cricket on Yahoo! India cricket
> http:</http:>
> Yahoo! Messenger Mobile
> http:</http:>
> Stay in touch with your buddies all the time. — Questions? First
> check the IFS FAQ at https://www.osronline.com/article.cfm?id=17 You
> are currently subscribed to ntfsd as: xxxxx@comcast.net To
> unsubscribe send a blank email to xxxxx@lists.osr.com</mailto:xxxxx></mailto:xxxxx>

8

You can only access the unformatted partition in raw blockwise mode without
caching (with sector-aligned IO).

Surely you cannot create named disk files on it.

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

----- Original Message -----
From: “yuvraj rege”
To: “Windows File Systems Devs Interest List”
Sent: Tuesday, March 07, 2006 11:28 AM
Subject: RE: [ntfsd] How to access the raw partition from filter driver

> Is this true that ZwCreateFile or ZwReadFile/ZwWriteFile works only for the
recognised/formatted partitions?
> Can’t I use these functions with unformatted partitions?
> Please tell me if there is any other way for accessing unformatted
partitions?
> I want to use unformatted partition as a nonvolatile buffer for I/O
operations in my filter driver. Actually I want to avoid the overhead of seek
and latencies
> causes due to fragmentation of partitions.Thats why I want to use
unformatted contiguous space in the harddisk.
>
> Regards
>
> Mrunal Rege
>
>
>
>
>
>
> ---------------------------------
>
> From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com]
On Behalf Of yuvraj rege
> Sent: Monday, March 06, 2006 12:37 PM
> To: ntfsd redirect
> Subject: Re: [ntfsd] How to access the raw partition from filter driver
>
>
> Hello Sir,
> Thank you for your kind help!
> I have tried path name as “\Device\Harddisk0\Partition1”
> but it is working only for formatted partitions. When I tried this on
formatted
> partition I got STATUS_SUCCESS but as soon as I made the patition
unformatted using ‘Partition Magic’ software it returned me
> STATUS_INVALID_PARAMETER . Why this is? If my driver is below file system
> drivers where “DiskPerf” exists then it should not behave with the formatted
and unformatted partition distinctly , I think.
> Is ZwCreateFile suitable for only formatted partitions? Is there any
other way to access unformatted partition?
>
> Best Regards
>
> Mrunal
>
>
>
>
>
>
>
> “xxxxx@Home” wrote:
> Mrunal,
>
>
>
> if you are not done yet, here’s a working snippet.
>
> Look at sharing flags.
>
>
>
> HANDLE FileHandle = 0;
> NTSTATUS OpenRaw() {
> UNICODE_STRING FileName;
> NTSTATUS ntStatus;
> OBJECT_ATTRIBUTES ObjectAttributes;
> WCHAR PathPrefix = L"\Device\Harddisk0\Partition1";
> //ULONG FileNameLength;
> IO_STATUS_BLOCK IoStatus;
> RtlInitUnicodeString(&FileName, PathPrefix);
> InitializeObjectAttributes(&ObjectAttributes, &FileName,
> OBJ_CASE_INSENSITIVE, NULL, NULL);
> ntStatus = ZwCreateFile(&FileHandle,
> FILE_READ_DATA | FILE_WRITE_DATA,
> &ObjectAttributes,
> &IoStatus,
> NULL,
> FILE_ATTRIBUTE_NORMAL,
> //0, // ntStatus = 0xC0000043L =
STATUS_SHARING_VIOLATION
> FILE_SHARE_READ | FILE_SHARE_WRITE, // ntStatus = 0, FileHandle =
0x400 or 0x208 etc.
> FILE_OPEN_IF,
> FILE_NON_DIRECTORY_FILE,
> NULL, 0);
> return ntStatus;
> }
>
> ----- Original Message -----
>
> From: yuvraj rege
>
> To: Windows File Systems Devs Interest List
>
> Sent: Friday, March 03, 2006 1:13 PM
>
> Subject: [ntfsd] How to access the raw partition from filter driver
>
>
>
> Hi , this is mrunal from Pune Institute Of Computer Technology.
>
> I m trying to access raw partition in windows2000 from my filter driver
which lies below NTFS drivers and above disk drivers. I tried ZwCreateFile call
but it is returning FILE_SUPERSEDED in IoStatus. Wht does it mean?
>
> Help me as soon as possible I need it in my Under Graduate Project.
>
>
>
>
>
> Regards
>
> Mrunal Rege
>
>
> ---------------------------------
>
> Jiyo cricket on Yahoo! India cricket
> Yahoo! Messenger Mobile Stay in touch with your buddies all the time. —
Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17 You are currently subscribed to
ntfsd as: xxxxx@bellsouth.net To unsubscribe send a blank email to
xxxxx@lists.osr.com
>
> —
> Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
> To unsubscribe send a blank email to xxxxx@lists.osr.com
>
>
> ---------------------------------
>
> Jiyo cricket on Yahoo! India cricket
> Yahoo! Messenger Mobile Stay in touch with your buddies all the time. —
Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17 You are currently subscribed to
ntfsd as: xxxxx@osr.com To unsubscribe send a blank email to
xxxxx@lists.osr.com
>
>
> —
> Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
> To unsubscribe send a blank email to xxxxx@lists.osr.com
>
>
> ---------------------------------
> Jiyo cricket on Yahoo! India cricket
> Yahoo! Messenger Mobile Stay in touch with your buddies all the time.
> —
> Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com

9

I am sorry if I have done cross posting. I am thankfull to you for alerting me.
But I don’t understand what is crossposting . If you could tell me I will not repeat the same mistake.

Thank you!
MM wrote:
yuvraj,

Peter, OSR’s founder, has already asked you to stop cross posting. In
case you forgot what he told you, here it is again:

PLEASE DON’T CROSS POST.

If you’re gonna post to the list the first day you join (which is never a good idea), at least have the common decency to read the list FAQ before posting.

Arrrgh…

Peter
OSR

m.

yuvraj rege wrote:

> Is this true that ZwCreateFile or ZwReadFile/ZwWriteFile works only
> for the recognised/formatted partitions?
> Can’t I use these functions with unformatted partitions?
> Please tell me if there is any other way for accessing unformatted
> partitions?
> I want to use unformatted partition as a nonvolatile buffer for I/O
> operations in my filter driver. Actually I want to avoid the overhead
> of seek and latencies
> causes due to fragmentation of partitions.Thats why I want to use
> unformatted contiguous space in the harddisk.
>
> Regards
>
> Mrunal Rege
>
>
>
>
>
>
> ------------------------------------------------------------------------
> From: xxxxx@lists.osr.com
> [mailto:xxxxx@lists.osr.com] *On Behalf Of *yuvraj rege
> Sent: Monday, March 06, 2006 12:37 PM
> To: ntfsd redirect
> Subject: Re: [ntfsd] How to access the raw partition from filter
> driver
>
> Hello Sir,
> Thank you for your kind help!
> I have tried path name as "\Device\Harddisk0\Partition1
> “
> but it is working only for formatted partitions. When I tried this
> on formatted
> partition I got STATUS_SUCCESS but as soon as I made the
> patition unformatted using ‘Partition Magic’ software it returned me
> STATUS_INVALID_PARAMETER . Why this is? If my driver is below file
> system
> drivers where “DiskPerf” exists then it should not behave with the
> formatted and unformatted partition distinctly , I think.
> Is ZwCreateFile suitable for only formatted partitions? Is
> there any other way to access unformatted partition?
>
> Best Regards
>
> Mrunal
>
>
>
>
>
>
>
> /“xxxxx@Home” / wrote:
> Mrunal,
>
> if you are not done yet, here’s a working snippet.
> Look at sharing flags.
>
> HANDLE FileHandle = 0;
> NTSTATUS OpenRaw() {
> UNICODE_STRING FileName;
> NTSTATUS ntStatus;
> OBJECT_ATTRIBUTES ObjectAttributes;
> WCHAR PathPrefix = L”\Device\Harddisk0\Partition1
> ";
> //ULONG FileNameLength;
> IO_STATUS_BLOCK IoStatus;
> RtlInitUnicodeString(&FileName, PathPrefix);
> InitializeObjectAttributes(&ObjectAttributes, &FileName,
> OBJ_CASE_INSENSITIVE, NULL, NULL);
> ntStatus = ZwCreateFile(&FileHandle,
> FILE_READ_DATA | FILE_WRITE_DATA,
> &ObjectAttributes,
> &IoStatus,
> NULL,
> FILE_ATTRIBUTE_NORMAL,
> //0, // ntStatus = 0xC0000043L =
> STATUS_SHARING_VIOLATION
> FILE_SHARE_READ | FILE_SHARE_WRITE, // ntStatus = 0,
> FileHandle = 0x400 or 0x208 etc.
> FILE_OPEN_IF,
> FILE_NON_DIRECTORY_FILE,
> NULL, 0);
> return ntStatus;
> }
>
> ----- Original Message -----
> From: yuvraj rege
> To: Windows File Systems Devs Interest List
>
> Sent: Friday, March 03, 2006 1:13 PM
> Subject: [ntfsd] How to access the raw partition from filter
> driver
>
> Hi , this is mrunal from Pune Institute Of Computer Technology.
> I m trying to access raw partition in windows2000 from my
> filter driver which lies below NTFS drivers and above disk
> drivers. I tried ZwCreateFile call but it is returning
> FILE_SUPERSEDED in IoStatus. Wht does it mean?
> Help me as soon as possible I need it in my Under Graduate
> Project.
>
>
> Regards
> Mrunal Rege
> ------------------------------------------------------------------------
> Jiyo cricket on Yahoo! India cricket
>
> Yahoo! Messenger Mobile
>
> Stay in touch with your buddies all the time. — Questions?
> First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17 You are currently
> subscribed to ntfsd as: xxxxx@bellsouth.net To unsubscribe
> send a blank email to xxxxx@lists.osr.com
>
>
> —
> Questions? First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: unknown lmsubst tag
> argument: ‘’
> To unsubscribe send a blank email to
> xxxxx@lists.osr.com
>
> ------------------------------------------------------------------------
> Jiyo cricket on Yahoo! India cricket
>
> Yahoo! Messenger Mobile
>
> Stay in touch with your buddies all the time. — Questions? First
> check the IFS FAQ at https://www.osronline.com/article.cfm?id=17
> You are currently subscribed to ntfsd as: xxxxx@osr.com To
> unsubscribe send a blank email to xxxxx@lists.osr.com
>
> —
> Questions? First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: unknown lmsubst tag
> argument: ‘’
> To unsubscribe send a blank email to
> xxxxx@lists.osr.com
>
>
> ------------------------------------------------------------------------
> Jiyo cricket on Yahoo! India cricket
>
> Yahoo! Messenger Mobile
>
> Stay in touch with your buddies all the time. — Questions? First
> check the IFS FAQ at https://www.osronline.com/article.cfm?id=17 You
> are currently subscribed to ntfsd as: xxxxx@comcast.net To
> unsubscribe send a blank email to xxxxx@lists.osr.com

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---------------------------------
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10

Lol have you even heard of google http://en.wikipedia.org/wiki/Crossposting

“yuvraj rege” wrote in message news:xxxxx@ntfsd…
I am sorry if I have done cross posting. I am thankfull to you for alerting
me.
But I don’t understand what is crossposting . If you could tell me I will
not repeat the same mistake.

Thank you!
MM wrote:
yuvraj,

Peter, OSR’s founder, has already asked you to stop cross posting. In
case you forgot what he told you, here it is again:

PLEASE DON’T CROSS POST.

If you’re gonna post to the list the first day you join (which is never a
good idea), at least have the common decency to read the list FAQ before
posting.

Arrrgh…

Peter
OSR

m.

yuvraj rege wrote:

> Is this true that ZwCreateFile or ZwReadFile/ZwWriteFile works only
> for the recognised/formatted partitions?
> Can’t I use these functions with unformatted partitions?
> Please tell me if there is any other way for accessing unformatted
> partitions?
> I want to use unformatted partition as a nonvolatile buffer for I/O
> operations in my filter driver. Actually I want to avoid the overhead
> of seek and latencies
> causes due to fragmentation of partitions.Thats why I want to use
> unformatted contiguous space in the harddisk.
>
> Regards
>
> Mrunal Rege
>
>
>
>
>
>
> ------------------------------------------------------------------------
> From: xxxxx@lists.osr.com
> [mailto:xxxxx@lists.osr.com] *On Behalf Of *yuvraj rege
> Sent: Monday, March 06, 2006 12:37 PM
> To: ntfsd redirect
> Subject: Re: [ntfsd] How to access the raw partition from filter
> driver
>
> Hello Sir,
> Thank you for your kind help!
> I have tried path name as "\Device\Harddisk0\Partition1
> “
> but it is working only for formatted partitions. When I tried this
> on formatted
> partition I got STATUS_SUCCESS but as soon as I made the
> patition unformatted using ‘Partition Magic’ software it returned me
> STATUS_INVALID_PARAMETER . Why this is? If my driver is below file
> system
> drivers where “DiskPerf” exists then it should not behave with the
> formatted and unformatted partition distinctly , I think.
> Is ZwCreateFile suitable for only formatted partitions? Is
> there any other way to access unformatted partition?
>
> Best Regards
>
> Mrunal
>
>
>
>
>
>
>
> /“xxxxx@Home” / wrote:
> Mrunal,
>
> if you are not done yet, here’s a working snippet.
> Look at sharing flags.
>
> HANDLE FileHandle = 0;
> NTSTATUS OpenRaw() {
> UNICODE_STRING FileName;
> NTSTATUS ntStatus;
> OBJECT_ATTRIBUTES ObjectAttributes;
> WCHAR PathPrefix = L”\Device\Harddisk0\Partition1
> ";
> //ULONG FileNameLength;
> IO_STATUS_BLOCK IoStatus;
> RtlInitUnicodeString(&FileName, PathPrefix);
> InitializeObjectAttributes(&ObjectAttributes, &FileName,
> OBJ_CASE_INSENSITIVE, NULL, NULL);
> ntStatus = ZwCreateFile(&FileHandle,
> FILE_READ_DATA | FILE_WRITE_DATA,
> &ObjectAttributes,
> &IoStatus,
> NULL,
> FILE_ATTRIBUTE_NORMAL,
> //0, // ntStatus = 0xC0000043L =
> STATUS_SHARING_VIOLATION
> FILE_SHARE_READ | FILE_SHARE_WRITE, // ntStatus = 0,
> FileHandle = 0x400 or 0x208 etc.
> FILE_OPEN_IF,
> FILE_NON_DIRECTORY_FILE,
> NULL, 0);
> return ntStatus;
> }
>
> ----- Original Message -----
> From: yuvraj rege
> To: Windows File Systems Devs Interest List
>
> Sent: Friday, March 03, 2006 1:13 PM
> Subject: [ntfsd] How to access the raw partition from filter
> driver
>
> Hi , this is mrunal from Pune Institute Of Computer Technology.
> I m trying to access raw partition in windows2000 from my
> filter driver which lies below NTFS drivers and above disk
> drivers. I tried ZwCreateFile call but it is returning
> FILE_SUPERSEDED in IoStatus. Wht does it mean?
> Help me as soon as possible I need it in my Under Graduate
> Project.
>
>
> Regards
> Mrunal Rege
> ------------------------------------------------------------------------
> Jiyo cricket on Yahoo! India cricket
>
> Yahoo! Messenger Mobile
>
> Stay in touch with your buddies all the time. — Questions?
> First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17 You are currently
> subscribed to ntfsd as: xxxxx@bellsouth.net To unsubscribe
> send a blank email to xxxxx@lists.osr.com
>
>
> —
> Questions? First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: unknown lmsubst tag
> argument: ‘’
> To unsubscribe send a blank email to
> xxxxx@lists.osr.com
>
> ------------------------------------------------------------------------
> Jiyo cricket on Yahoo! India cricket
>
> Yahoo! Messenger Mobile
>
> Stay in touch with your buddies all the time. — Questions? First
> check the IFS FAQ at https://www.osronline.com/article.cfm?id=17
> You are currently subscribed to ntfsd as: xxxxx@osr.com To
> unsubscribe send a blank email to xxxxx@lists.osr.com
>
> —
> Questions? First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: unknown lmsubst tag
> argument: ‘’
> To unsubscribe send a blank email to
> xxxxx@lists.osr.com
>
>
> ------------------------------------------------------------------------
> Jiyo cricket on Yahoo! India cricket
>
> Yahoo! Messenger Mobile
>
> Stay in touch with your buddies all the time. — Questions? First
> check the IFS FAQ at https://www.osronline.com/article.cfm?id=17 You
> are currently subscribed to ntfsd as: xxxxx@comcast.net To
> unsubscribe send a blank email to xxxxx@lists.osr.com

—
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https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: xxxxx@yahoo.co.in
To unsubscribe send a blank email to xxxxx@lists.osr.com

Jiyo cricket on Yahoo! India cricket
Yahoo! Messenger Mobile Stay in touch with your buddies all the time.