<style></style> <body leftmargin=1 topmargin=1> <P>Hello, I'm at the beginning to use LVM in my machine.</P> <P> </P> <P>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 structures in LVM2/lib/metadata/metadata.h, but I can't get more information anymore on how they are mapped.</P> <P> </P> <P>I was hanging around the codes in LVM2 source to find the part related with the "mapping", I just got to know the mapping information is stored in device mapper, not in the LVM. </P> <P> </P> <P>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.</P> <P> </P> <P>Could you give me some information on LVM & device-mapper details that help me??</P> <P>- exactly all about the mapping between LE & PE..</P> <P>I'm totally at the beginning, I'm well prepared to dig in the codes from now on, does anyone can help me to run faster??</P> </body> <img src="http://mail.postech.ac.kr:80/receiveMDNResponse.do?from=jowkju@postech.ac.kr&to=linux-lvm@redhat.com&mid=14668645.1149686019055.JavaMail.root%40mail1&store=%2Fstore01%2Fmindex%2F837%2Fjowkju&host=mail.postech.ac.kr" height=1 width=1>