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Subject: Re: [linux-lvm] How Can I modify the mapping PE to LE??
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To: jowkju@postech.ac.kr, LVM general discussion and development <linux-lvm@redhat.com>

조완근 wrote:
> Hello, I'm at the beginning to use LVM in my machine.
>
> Could you give any information on the implementation details of LVM and 
> device mapper?? More specifically, I want to change the "mapping between 
> PE and LE" for some purposes, however I'm just finished to read the 
> manual of LVM-HowTO. This means that I'm totally a newbie in LVM and 
> device-mapper. I just read some codes on data 
> ...
> I'll use LVM for this purpose - I would like to make a program to change the 
> mapping relationship between PE and LE in my own. In fact, the program's goal
> is to move an extent in a bad disk to a disk with good performance. The movement 
> is done by the extent. In order to do it, I definitely, have to know how I can 
> modify the mapping and maybe, the entire structure of LVM and device mapper.

Hmm, are you realy finished to read the manual :-)

Sounds to me like you reinvent the "pvmove" command.
This is not "some purpose" but a central task
LVM performs for you on demand!

regards, Dieter.