sfdisk

• http://radagast.ca/partition%20tables/partition%20tables%20backup%20and%20recovery.html

sfdisk -d "/dev/sda" | tee "logical.sfdisk"

# partition table of /dev/sda
unit: sectors

/dev/sda1 : start=     2048, size=  1048576, Id=83, bootable
/dev/sda2 : start=  1050624, size=975722544, Id=83
/dev/sda3 : start=        0, size=        0, Id= 0
/dev/sda4 : start=        0, size=        0, Id= 0

sfdisk "/dev/sda" < "logical.sfdisk"