Matt Smollinger just replied to this with greater precision than me. I 
use the 'copydisk' command exclusively because that is what I want to 
do, clone an entire disk to another disk. I don't copy partitions. So I 
stand corrected on that (thanks Matt!)

Bob

Robert L Cochran wrote:
> Well you are wrong. I've cloned, and booted to the cloned versions, of 
> NTFS systems (Windows XP et al) so many times that I know it works. I 
> don't need to use purchased software to do my cloning. I can 
> confidently clone any NTFS system from an existing hard drive, to a 
> larger hard drive, swap the drives, and boot to that larger drive 
> without the slightest problem. I've also cloned Linux systems and 
> those too boot just fine. The trick is to make sure that the cloned 
> drive is at least as big or bigger (in actual bytes) than the source 
> drive.
>
> You can also clone any NTFS filesystem which has been created as a 
> virtual machine, as in VMWare. You just copy the virual machine from 
> disk A to disk B, all you need is enough space. You may have to do a 
> bit of fine tuning and debugging but it works. when run under VMware.
>
> Bob Cochran
>
>
>
> David Balazic wrote:
>> Hi!
>>  
>> At http://www.feyrer.de/g4u/#filesystems it says :
>>
>> 5.1 Supported filesystems
>>
>> One of the questions arising a lot is "what filesystems does g4u 
>> support". The answer is: "all of them". g4u reads the disk bit by 
>> bit, starting from byte #0 to the end. It includes any MBR, boot 
>> record, partition table and the partitions themselves without further 
>> investigating the structure of the data stored in these partitions.
>>
>> For NTFS and Windows, this contradicts itself ;-)
>>  
>> Problem 1 :
>> If you copy a ntfs partition to another partition (let say on the 
>> same disk) bit by bit, it wont work (at all, or will report errors; 
>> in Windows).
>> Namely, ntfs stores some data related to its position on the disk. 
>> After days of debugging this problem, I found a web site explaining 
>> the background and also how to fix it. Unfortunately, I don't 
>> remember the address of that site. Basically, the start postion of 
>> the partition must be stored somewhere in the ntfs system data 
>> sectors, expressed as bytes from the beginning of the disk (warning, 
>> writing from memory).
>>  
>> Problem 2:
>> If you clone bit by bit a disk to another and it contains Windows, 
>> the clone will probably not work (fail right in the boot loader). 
>> This is again, because the Windows boot system has a dependency on 
>> certain crap that you surely know, called "geometry". Which can be 
>> different for different disks. In this moment, I have no idea how to 
>> fix this.
>>
>> I believe this info would clear up a few things for users cloning 
>> Windows related disks and/or partitions.
>>  
>> Regards,
>> David
>>  
>> PS: I would be great if you propagate this info to other implementors 
>> of free disk cloning programs, so they can inform they users. (and by 
>> that reduce traffix on their mailing lists; this of course should 
>> hold also for this list)
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