From
man 7zr:
Code:
Backup and limitations
DO NOT USE the 7-zip format for backup purpose on Linux/Unix because :
- 7-zip does not store the owner/group of the file.
See:
I would say that you should extract that image file. Then use dd to write it to device node.
Code:
dd if=myfile-operating-system-sda.img of=/dev/sda bs=1M
Everything on sda will be overwritten.