Hardware Reference
In-Depth Information
Win32 Disk Imager is also used to write the operating system images
available for download at
http://www.raspberrypi.org/
downloads
directly to the SD card without using NOOBS.
Complete SD card backup in MAC OS X
We'll be making a complete mirror image of your SD card. The data will be stored in
a single compressed file, which should result in a smaller size than that of your SD
card. The steps to be followed for a data backup are:
1. Power off your Pi safely and move the SD card to your computer's
card reader.
2. Open up a terminal (located in
/Applications/Utilities
on the Mac).
3. Type
diskutil list
to obtain a readout of all connected storage devices.
4. To correctly identify your SD card, we're looking for a disk that has at least
one Windows and one Linux entry under
TYPE
(there will be two of each
type if we installed Raspbian through NOOBS).
5. Take note of that disk's first
IDENTIFIER
field (
disk1
in the screenshot).
6. As a security precaution, we will first unmount the SD card so that no
applications running in the background can change data as we make
our backup. Use the following command, but replace
[disk]
with the
IDENTIFIER
field of your SD card:
$ diskutil unmountdisk [disk]
7.
Now we'll do a complete copy of the SD card and store it in a file called
agent_sdcard.img.gz
on your desktop. Type the following command, but
replace
[disk]
with the
IDENTIFIER
field of your SD card (note the letter
r
in front of
disk
):
$ sudo dd if=/dev/r[disk] bs=4m | gzip > ~/Desktop/agent_sdcard.
img.gz
