SD-Card-Documentation

Just a reminder about how to work with SD Cards

Locate SD Card

$ ls /dev/sd*

Output:

/dev/sda /dev/sda2 /dev/sda4 /dev/sda6 /dev/sda1 /dev/sda3 /dev/sda5 /dev/sda7

Insert the SD Card and type again the same command:

$ ls /dev/sd*

Output:

/dev/sda /dev/sda2 /dev/sda4 /dev/sda6 /dev/sdb /dev/sda1 /dev/sda3 /dev/sda5 /dev/sda7

The /dev/sdb was added to the output. Meaning thats our SD Card.

SD Card Formating

To format an SD Card using the terminal you must run the next command:

$ lsblk

Output:

sda      8:0    0 931.5G  0 disk 
├─sda1   8:1    0   512M  0 part /boot/efi
├─sda2   8:2    0     1K  0 part 
└─sda5   8:5    0   931G  0 part /
sdb      8:16   1  29.8G  0 disk 
├─sdb1   8:17   1   256M  0 part /media/user/boot
└─sdb2   8:18   1  29.6G  0 part /media/user/rootfs
sr0     11:0    1  1024M  0 rom 

Now that we alrady identified the SD Card partition we can proceed to wipe off the info with the following command:

$ sudo dd if=/dev/zero of=/dev/sdb bs=4096 status=progress

Output:

7815169+0 records in
7815168+0 records out
32010928128 bytes (32 GB, 30 GiB) copied, 4438.74 s, 7.2 MB/s

Now your SD Card its completely empty

Bruning an image into a SD Card

Once you have the image you want to burn into the SD Card you type the command:

$ sudo dd if=FreeBSD-13.0-RELEASE-arm64-aarch64-RPI.img-1 of=/dev/sdb bs=1 status=progress

Output: