Test whether partitions seem correct:
sfdisk -V /dev/sda
Copy the entire partition table from one disk to another:
sfdisk -d /dev/sda | sfdisk /dev/sdb
Dump the partitions of a device in a format useful as input to sfdisk:
sfdisk -d /dev/sda > partition.table.dump
Write a devices partition table from file:
sfdisk /dev/sdb < partition.table.dump