How to create a virtual drive of a non bootable drive ?

I just want to know that which command or apple script is used to create a virtual drive of a drive ?

I have a disk which have 6 partitions , and I don't know how but one partition is get corrupted and I am trying to correct it programmatically, without using any software.

But I am not sure that the operation I performed on the drive is feasible or not i.e it make the drive correct or not.

So I want to generate a virtual drive of that drive through which I can can see the changes made in the actual drive is correct or not.

And the virtual drive which I'm trying to create must be able to mount i.e shown in the 'Disk Utility'.

The purpose behind creating the virtiual drive is to see the changes that we made in the original drive is correct or not, if they are correct then we save the changes of original drive otherwise performred more operations and saw them through the preview of virtual drive.

Hope you understand now.

If you ever saw the working of 'subst' command in windows, then you will easily understand what I'm trying to explain.

The 'subst' command is used to create the virtual drive of a drive, we just provide the alphabet for the virtual drive.

This creates the entity of the drive having another name.

So the same work i'd like to do in Mac i.e to create a virtual drive of a drive whether it is a external drive.

Daemon tool do the same thing, it creates the virtual drive.

So you please help me for this.

Is ther any command in Mac or any apple script to create the virtual drive, please tell.

Important thing is that the drive is non bootable.

This is not the solution of problem, this creates the dmg of the drive but we need to create the virtual drive i.e a kind of mirror image having same data , same size , same attributes etc.

Use Disk Utility > New > Disk Image from ... (folder or device)

This only create the dmg of the drive having different size capacity and attributes not same as the original drive.

So is there any comand or script to create virtual drive ?????

Alias can never be mount, but the virtual drive I want to create must be able to mount and unmount.

Desktop having both original and virtual drive.

My system is booted from 'Snow leopard' and I've an another drive, name 'Disk Testing' so by using a software I create the virtual drivre of 'Disk Testing' as you can see in the image. Both the drives are identical to each other and both are able to mount and unmount, they are having same data and attributes.

So I want to create exactly this kind of virtual drive by using any apple script or command.i.e without using any software.

Please rply....

Okay leave it...

just tell me..

Is there any command to copy all files and folders (including hidden files and folders) of a drive into another drive.