DD not working--SUCCESS!

[Karl Larsen]

Les Mikesell wrote:
> Karl Larsen wrote:
>>
>>    If you want to copy something big from one partition to another 
>> the old dd method is for you. You have to do it right. This means that:
>>
>> 1. The destination partition MUST be at least a byte larger than the  
>> source partition where the data is coming from. This is essential!
>
> This isn't true.  Can you explain why you think it is?
    Yes I can. My first try with dd I tried to put a 40GB partition into 
a 20GB partition and dd errored out. Then I read man dd.
>
>> 3. Be ready to check the file system of the copy with fsck.
>
> If your source partition is cleanly unmounted, the destination will be 
> clean as well. Perhaps so but I like to run fsck just to be sure 
> nothing is wrong.
>
>> 8. Think of how dd works this way, dd see's the source partition as 
>> just a pile of bytes. It takes a few bytes each cycle and puts those 
>> bytes on the destination partition. When done dd reports how many 
>> bytes it found and how many it put on destination. They are the same 
>> large number.
>
> This means it is important for the source to not change during the 
> copy so it should be unmounted.
>
    It does and the method using the Rescue mode allows this.


-- 

	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.