dd if=/dev/sda of=image/sda_full.img bs=64k 244353+1 records in 244353+1 records out 16013942784 bytes (16 GB) copied, 577.159 s, 27.7 MB/s
Now what’s in that file:
file sda_full.img
results in my case in
sda_full_3_20120919.img: x86 boot sector; partition 1: ID=0x83, active, starthead 32, startsector 2048, 29870080 sectors; partition 2: ID=0x5, starthead 254, startsector 29874174, 1402882 sectors, code offset 0x63
This tells me /dev/sda contains 2 partitions.
Now I want tho mount the first partition, starting at sector 2048
now the offset of this partition must be calculated: 512 * 2048 = 1048576
Mounting is now be done by
sudo mount -o loop,offset=1048576 sda_full.img /tmp/tmp_mount
restore on other computer:
sudo dd if=image/sda_full.img of=/dev/sda bs=64k 244353+1 records in 244353+1 records out 16013942784 bytes (16 GB) copied, 523.89 s, 30.6 MB/s