I use Debian Wheezy.Yesterday I added a new HDD to the system and expanded the LVM using the system-config-lvm gui-tool.I have a logical LVM group for root, /, and one for home, /home.I also installed updates.Boot process:Windows 7 boots fineHow can I fix it?
Debian doesn't boot anymore
debian;boot;lvm
It's not clear exactly what you did when you expanded the LVM. It seems that what you did required updating some values that Grub needs to locate the root filesystem: one of the hard disks has changed its identification.While it is probably possible to boot your system by issuing the right commands at this prompt, this is pretty complex and difficult to explain without being in front of the machine. You'll have to locate the root device, mount it and run /init to switch to it.I recommend booting from a rescue CD/USB. SystemRescueCD is a good choice. Activate and mount your system's root volume, then run the following commands in a terminal (with the root volume mounted on /target):mount --rbind /dev /target/devmount --rbind /proc /target/procmount --rbind /sys /target/syschroot /targetupdate-grubWith your setup, I think this will result in a bootable system. If it doesn't, post the contents of /boot/grub/grub.cfg and /etc/fstab.