3.4 KiB
layout, title
| layout | title |
|---|---|
| post | Automatic SD Card Backer Upper |
Automatic SD Card Backer Upper
I play on my DSi a lot, and i have all of my cartridges dumped to an SD card so I don't need to carry them with me to switch games. All my saves are stored on the SD card too, and sometimes I worry about the card getting corrupted or lost. So I used my Raspberry Pi to easily back it up. All I have to do is plug the card into the Pi, and it copies the files into a new folder and toggles a light when its done.
What I used:
- SD Card adapter
- USB mouse that I didn't care about (any usb device that can light up will work)
- Raspberry Pi 3 (any raspberry pi with a USB connection and 3.5mm jack will work)
I did this on Ubuntu, but the instructions should work for Raspbian as well.
Files
I made a few files for this to work: a udev rule file, a systemd unit, and a shell script.
Udev Rule
# /etc/udev/rules.d/999-automount.rules
ACTION=="add", SUBSYSTEM=="block", ENV{ID_SERIAL_SHORT}=="000000000828", RUN+="/usr/bin/systemctl start DSi.service"
You'll have to modify the 000000000828 to match the serial of your device,
which you can get by plugging in the device, finding its /dev file, and running
udevadm info /dev/sdx | grep ID_SERIAL_SHORT.
Systemd Service
# /etc/systemd/system/DSi.service
[Unit]
Description=back up dsi sd
[Service]
ExecStart=/home/ubuntu/autocopy.sh
[Install]
There's nothing in the [Install] section because this isn't made to be enabled
with systemctl enable, just executed with systemctl start, which the udev
rule will do automatically. You'll want to modify the ExecStart line to point
to your shell script.
Shell Script
#!/bin/sh
# /home/ubuntu/autocopy.sh
TIME=$(TZ=EST date +%F_%T) # used for folder name
LABEL=DSi # the label of the SD cards filesystem
MNT=/home/ubuntu/dsimnt # mount point of the sd card
BACKUPDIR=/home/ubuntu/DSi # main directory all backups go to
USBDEV=/sys/bus/usb/devices/1-1.5 # the sysfs entry for the usb device to use as a light
# turn on the "led indicator" thats really a usb mouse torn apart
echo 1 > ${USBDEV}/authorized
mount "/dev/disk/by-label/${LABEL}" ${MNT}
mkdir "${BACKUPDIR}/${TIME}"
cp -r ${MNT}/* ${BACKUPDIR}/${TIME}/
umount ${MNT}
echo "done! you can remove the card."
# turn that mouse back off
echo 0 > ${USBDEV}/authorized
You'll want to change the LABEL variable to whatever the label of your SD card
filesystem is.
You will probably want to change the TZ=EST inside the TIME variable unless
you happen to live on the eastern coast of the United States.
The mount point in the MNT variable is where the SD card should mount, which
can be anywhere.
The BACKUPDIR variable should be on a separate drive unless you have a
decently sized microSD inside your Pi that you don't mind filling up.
The USBDEV variable is the path to your USB "light" inside
/sys/bus/usb/devices. You can run lsusb to get the ID of the usb device,
then cat the idProduct and idVendor files inside each usb device folder
until you find the one that matches your usb device.
Final Product
What you'll have is something you can plug your SD card into and have a backup taken automagically. The light turns on when it's copying files, and turns off and unmounts the card when its done. You can see a video of it working here. Excuse the mess :) To access these backups, just go to the backup directory.
