Hello, I wanted to perform a live clone of a remote server main drive . The constraint would be to do that while the system is still running (without booting from a LiveCD). In case of crash or damage to the OS or applications settings, the idea would be to be back with minimal intervention: just remove the bad drive and boot from the clone. I thought it could be easy but I am encountering some problems with LVM configuration duplication. Below are the steps I followed: 1- Main OS The OS is installed on the main drive: /hda1 = /boot ext3 /hda2 = LVM The LVM is itself split in three: VolGroup00/LogVol00 = / ext3 VolGroup00/LogVol01 = swap VolGroup00/LogVol02 = /data 2- Clone preparation I added a second drive for the cloning. Manually configured the partitions and LVM to look like the main drive. /hdb1 = /boot ext3 (fdisk then mkfs.ext3 and e2label) /hdb2 = LVM (fdisk then LVM created with Fedora core 6 LVM GUI) The LVM is itself split in three: VolGroup01/LogVol00 = / ext3 VolGroup01/LogVol01 = swap (+mkswap /dev/VolGroup01/LogVol01) VolGroup01/LogVol02 = /data (In my current configuration the two drives are not the same brand/size. Also I am not trying to clone the /data volume. So everything is the same size but the */LogVol02 volumes). 3- Copy I created a snapshot of VolGroup00/LogVol00 and dd it to VolGroup01/LogVol00 Of course the above is taking VolGroup00 references to the VolGroup01 The /boot was copied with cp -av 4- Modification of LVM references. I booted from a knoppic CD to mount hdb and modify few LVM references (changed VolGroup00 to VolGroup01). /boot/grub/grub.conf /etc/fstab /boot/initrd-xyz.fc6.img (with gzip, cpio,..) 5- MBR Still under knoppic CD, I also created an MBR (mounted proc and dev, then chroot to the clone drive, then grub root and setup). Now if I boot from the clone, the MBR seems to work. Grub starts. But just after the 'Uncompressing kernel' message, I get an error about allocating Ram0 (grow_buffer: requested out of range block ... for device Ram0). I am guessing the a reference of the VolGroup00 is left somewhere. Or maybe a swap definition issue? Any suggestions on what to clean on the clone to make it working? Somehow I was hoping that the LVM information would be dynamically read. But there must be some hidden references left. Thanks Thierry _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
