DD not working--SUCCESS!
Karl Larsen
k5di at zianet.com
Sat Sep 1 15:12:02 UTC 2007
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.
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