Backup microSD Card image

Backing up microSD Cards is good practice. This is how I do it. But backup is the wrong term. I am actually creating an image that can be loaded on a new microSD Card.

To create a backup, use rsync. I think it would be great backup a Raspberry Pi to a USB Drive without shutting down the Raspberry Pi or removing the microSD Card, and have this done periodically via crontab.

PyMyLifeUp: See instructions with this header: Backing up your Raspberry Pi to a USB Drive

Parts:

Raspberry Pi

USB microSD Card Reader

Step 1. Get the microSD Card

Shutdown the Raspberry Pi

$ sudo shutdown -h 0

Remove the microSD Card

Put the microSD Card into a USB reader

Step 2. Make a copy

Put the USB device in a MacBook and make a copy of the image

On a MacBook, open a terminal window and run the command

$ diskutil list

/dev/disk5 (disk external):

Identify the USB device. It should be marked as external.

I keep backups in my Downloads directory on my MacBook

Run a command similar to the following. rdisk is important on a MacBook:

$ sudo dd if=/dev/rdisk♣your-usb-disk-#♣ of=/Users/♣your-account♣/Downloads/♣image-filename♣

Step 3. Put the microSD Card back

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