raspberry Pi SD card formatting and image copying

rPi-SD-imaging.md

SD CARD IMAGE COPY AND RESTORE

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great for RaspberryPi disk imaging and copying.

LOCATE AND UNMOUNT DISK

insert SD card into computer. to see all volumes mounted to machine:

$ diskutil list

locate your SD card. going forward, change {N} to your disk number.

unmount (but don't eject) the disk you’re speaking to

$ diskutil unmountDisk /dev/disk{N}

CREATE AN IMAGE OF EXISTING SD CARD

$ sudo dd bs=1m if=/dev/rdisk{N} of=/Users/Desired/Path/To/Image/rpi_image_new.dmg

FORMAT YOUR EXTERNAL VOLUME

format the disk to FAT32

$ sudo newfs_msdos -F 32 /dev/disk{N}

FLASH PRE-EXISTING IMAGE

execute the dd utility.

• change the if (infile) path to the path of your image.
• for the of (outfile) make sure you use the disk number with r in front (rawdisk).

    $ sudo dd bs=1m if=/Users/Path/To/Existing/Image/rpi_image.dmg of=/dev/rdisk{N}

note: you can check the progress of the by hitting ctrl + t. be careful to not accidentally quit the process (ctrl + c) or you will need to execute the command again.

EJECT THE DISK

after imaging or writing any external volume, you'll want to safely eject the disk.

$ diskutil eject /dev/disk{N}

credit: chris piuggi