Il giorno gio, 08/06/2006 alle 19.28 -0400, Neal Becker ha scritto: > I have 2 drives setup with lvm. They are basically raid 0 (striped). One > is dying. > > I wonder if could duplicate the partitions to a new drive using dd. I need > to copy the lvm identity as well. I'm guessing that is in the boot block > of the drive? > > So if I have sda, with partitions sda1, sda2, then if I use dd to > copy /dev/sda, /dev/sda1, /dev/sda2, then swap the drives and I'm good? You must pay attention to some things. For first, sda1 and sda2 are partitions. sda is the entire disk So, if you copy sda, automatically copy the boot record and partitions definitions, and data of sda1 and sda2. You copy also eventual free space. So if you do not have free unpartitioned space, and you have an equal or bigger disk on which copy data, you can use dd if=/dev/sda otherwise you can use sda1 and sda2 LVM Info are in partitions and not in disks. If you have LVM alreay configured, you can use also the /dev/vg/lv that is similar to partitions. So if you can reconfigure LVM on the other disc, you can copy only info about LV and not entire disk. I think it's best in your case, because of raid 0 used between sda1 and sda2. It's not usefull and performance is not good. About performance you have to be care about dd that is like a sequential block read. So you can choose a blocksize in dd options that is better for you and it depends on disk types, controllers (USB 1 or 2) and free RAM. Bye Ambrogio
