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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 a problem.Then I did with readfile() and WriteFile() instead of Copyfile() again speed is a problem.

How can I 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 .....?

I want to copy a hard disk partition into another partition. My source and destination partitions are of NTFs and same size. For that purpose first I did by copying all sectors and it is working, But I wanna copy only used sectors…

Then I find the used clusters by reading the FSCTL_VOLUME_BITMAP. But this one also a slow one ..I want to get better speed. And I tried to get the used clusters by using the FSCTL_GET_RETEIVAL_POINTER also. But it's a slow one.....



At last I tried the windows API CopyFile() also…But everything gives a slow performance…


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....

And I've taken snapshot (Volume shadow copy)of the Volume and copied the files using Hobo copy method...but everything gives the same speed.....





Any idea to help...

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


Any idea to help me...to get a good speed.......???

Any links to the white papers related to this section...???




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Thanking you
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netcat utility (nc command) considered as TCP/IP swiss army knife. It reads and writes data across network connections, using TCP or UDP protocol. It is designed to be a reliable "back-end" tool that can be used directly or easily driven by other programs and scripts. At the same time, it is a feature-rich network debugging and exploration tool, since it can create almost any kind of connection you would need and has several interesting built-in capabilities.

I also install the netcat package for administering a network and you'd like to use its debugging and network exploration capabilities.

One my favorite usage is to migrating data between two server hard drives using netcat over a network. It is very easy to copy complete drive image from one server to another.

You can also use ssh for the same purpose, but encryption adds its own overheads. This is tried and trusted method (hat tip to karl) .

Make sure you have backup of all important data.