LVM data copy to different disk
 

hello all!
i've got a CentOS 5.4 box and the following disks connected:

# parted /dev/sda print

Model: ATA WDC WD1600BEKT-0 (scsi)
Disk /dev/sda: 160GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 32.3kB 107MB 107MB primary ext3 boot
2 107MB 160GB 160GB primary lvm


# parted /dev/sdb print

Model: ATA WDC WD1200BEVT-0 (scsi)
Disk /dev/sdb: 120GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 32.3kB 107MB 107MB primary ext3 boot
2 107MB 120GB 120GB primary ext3 lvm




the OS, data and programs are on /dev/sda.
I'd like to copy the full directories and files to the newly added /dev/sdb wich has, as you can see, less space.
Also note that /dev/sda has only about 3.6Gigs uses, so it will no doubt easily go into /dev/sdb.
How can i do the full copy, and yet make /dev/sdb bootable just like /dev/sda (just as if it was cloned by Ghost) ?
I've checked dd, but AFAIK, it needs that both source and target devices be the same in size.

TIA

SCC

use dd to copy the mbr and copy the rest with cp.