DD Rules
Karl Larsen
k5di at zianet.com
Fri Aug 31 18:44:23 UTC 2007
Matthew J. Roth wrote:
> Karl,
>
> For the sake of new users who are routinely instructed to research the
> list archives prior to asking a question, please explain the following
> points:
>
> Karl Larsen wrote:
>> 1. The destination partition MUST be at least a byte larger than the
>> source partition where the data is coming from. This is essential!
> Why must the destination partition be larger than the source
> partition? It is my understanding that the ideal situation is for
> both partitions to be the same size.
It is hard to be sure of partition size. I was using two Hard Drives
with exactly the same number of total cylinders to make the same 160 GB.
I made the destination partition 7 cylinders larger than the source with
fdisk. That is a lot of bytes bigger. But yes identical is better if you
know how to do that :-)
>> 4. If you are making a copy of an entire working Fedora system make
>> sure you change all the entries in /etc/grub.conf and /etc/fstab
>> files to the new partitions of the copy before you try to run it.
> This needs to be elaborated upon. Both "grub.conf" and "fstab" are
> critical files that may cause severe problems if misconfigured. Since
> this is a new thread, you must assume a reader is unaware of the
> changes you are referencing.
It is beyond the scope of this short paper.
>> 6. Always run dd in the source computer.
> Is it really wise to copy a mounted partition with a live file
> system? What if the file system is being written to during the copy?
> The advice to use a live CD (given in one of the other myriad threads
> on this topic) seems more prudent.
It didn't seem to make any problem. I was getting emails and sending
them. They were all working normal on this computer and the destination
copy runs just great.
>
> Thank you,
>
> Matthew Roth
> InterMedia Marketing Solutions
> Software Engineer and Systems Developer
>
--
Karl F. Larsen, AKA K5DI
Linux User
#450462 http://counter.li.org.
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