How to copy an NTFs partition?

[krishnampkkm]

Hii

I wanna copy an NTFs partition to another partition of same type and same size.And I tried with windows function
Copyfile() and it worked but slow speed is problem.then I did with readfile() and WriteFile() instead of Copyfile() again speed is a problem.

How can Get a better speed...??

I did the same operation in kernel mode and getting slow performance using zwCreatefile() ,zwReadfile() & zwWriteFile()...

How can I get a better speed .....

Any idea to help me...

I know fundamentally Kernel mode(ring 0) is slower than User mode in speed ,(even if ring 0 can access Hardware directly).....


Apart them these I tried also Asynchronous operation by setting OVERLAPPED flag in CreateFile.... getting small improvement....


But that one does not give reasonable speed......


Any idea to help...

I have used the Acronis Disk director suite.I exclaimed after finding it's speed......???


Any idea to help me...???



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Thanking you
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[WingedPanther]

Wait, are you trying to copy files between partitions, or an entire partition? They are two very different tasks.

[krishnampkkm]

Actually I wanna copy the entire partition...

But only the used data from the source partition....


So to take the used data.....( i try to copy filessss...)

And apart from that I tried to copy used clusters...

[krishnampkkm]

Thanks for the reply.....


Can you give me any links to the "white papers related to this section""

Any body know Any new algorithms......for the fast copy operation...

I searched but no way to get........



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Thanking you
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[WingedPanther]

OK, you keep saying contradictory things. You can do one of two things:
1) copy the ENTIRE partition. This is a pretty low-level operation and is NOT trivial.
2) copy selected files from one partition to another. This is a completely different activity, and really has nothing to do with whether the partition is NTFS, FAT32, etc.

[krishnampkkm]

First thanks for reply from your side...



Okkk.....I wanna do the first thing..... "copy the ENTIRE partition."

How to do that one....??




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Thanking you
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[WingedPanther]

You will have to write a program that can be run while you are NOT in the OS on the host partition. I would recommend using one of the freely available tools rather than try to write your own.