Backup partition table

Copying Partition Tables with sfdisk
To backup or replicate a disk’s partition table, use sfdisk:
$ sudo sfdisk –d /dev/sda > sda-table Back up partition table to file
$ sudo sfdisk /dev/sda < sda-table Restore partition table from file
$ sudo sfdisk –d /dev/sda | sfdisk /dev/sdb Copy partition table from disk to disk