$ sudo dd if=/dev/disk2 of=backup.my. bs=1m $ sudo dd if=/dev/disk2 of=backup.my. bs=512 Create the disk image with ddįinally create the disk image of the entire disk /dev/disk2: Here is what we see: Unmount of all volumes on disk2 was successful 3. In this example my SD card size is 4GB and located at /dev/disk2. Open the Terminal application and type the following command to list disks:įig.01: Insert in your SD card, or USB pen/HDD, and see /dev/diskN name To write the disk image: dd if=image.dd of=/dev/DISK.To create the disk image: dd if=/dev/DISK of=image.dd bs=512. How To Create Disk Image on Mac OS X With dd Command Always keep verified backups for your Mac. WARNING: Please be careful when running the following commands, as you might destroy essential data or disk. You also need to use diskutil command manipulates the structure of local disks including listing and unmouting disks before you create or write images to disk.
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