Note that you may not be able to simply copy and paste the above text because of the line breaks after the "\". To do this, type (remember to replace 'sdLX' with the particular 'sdLX' of your SD card, where L is a letter and X is the number): We need to first make sure our SD card is not mounted. Note that you could have multiple partitions on the disk that you have to unmount! So to follow along, swap out the 'b1' in /dev/sdb1 with whatever letter/numbers corresponds to yours. Which tells me that I have to unmount /dev/sdb1. To gather further information on which file descriptor corresponds to the partition I have to unmount, I type: Yours might show up at /dev/sdc, /dev/sdd, etc. So this means that my SD card is located at /dev/sdb. I/O size (minimum/optimal): 512 bytes / 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I inserted a 16 GB micro SD card into my UBS reader, and on my machine, I see an entry that looks like the following in the output:ĭisk /dev/sdb: 14.6 GiB, 15653142528 bytes, 30572544 sectors We have to figure out which file is associated with our micro SD card so that we can unmount it and perform the partioning operations on it.Īfter inserting your SD card into your reader, type: One of the first things that I learned about Linux when it comes to computer interfacing-something that I still have to remind myself of to this day-is that every device on your computer or processor is represented as a file in the /dev directory. We won't be entering any commands in the Raspberry Pi console yet.Ģ.1 Determining Which /dev File is Linked to Your SD Card Since it might not be entirely obvious, I should also mention that all of the following commands are to be carried out on the Ubuntu OS. Gparted is a great utility to do so, but I'm going to use the command line since we'll be going in that direction to do our embedded development anyway. There are plenty of ways to partition a disk. ROOT - this will contain the Linux root filesystem.
RASPBERRY PI SD CARD FORMATTER PLUS
BOOT - this will hold all of the bootloader files, the Linux kernel, plus files that deal with the kernel command line, the device tree, and device configuration.Here is a short description of what each is for: To follow along with the customary way that Raspberry Pi and many other Linux distributions slice things up, we'll make two partitions: a primary BOOT partition and a primary ROOT partition. There are multiple ways to partition an SD Card (or NAND/NOR flash) to accommodate an installation of Linux. After going through all the steps in this section, we should see our two partitions show up in Ubuntu like so. And even if you do have a pre-partitioned and formatted SD card, you might want to follow along with this just to learn how the partitioning and formatting works. Ok, so we've got the UART all connected and ready to go, but we don't have any files to boot from on our Micro SD Card. 2.0 Formatting a Micro SD Card with BOOT and ROOT Partitions
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