UDOO creating a bootable Micro SD card from precompiled image

Overview
The following paragraphs will guide to in the creation of a bootable micro SD card for UDOO board, starting from a precompiled image file containing the UDOO Operating system, which runs using the i.MX6 processor. Without the O.S., it is possible only to use UDOO like a normal Arduino Due (only SAM3X8E processor). The procedure is quite easy: simply unzip the image and write it on the SD card using the dd tool for UNIX/MAC users or Win32DiskImager for Windows users. It is not possible to create a bootable SD card with drag and drop. Please consider that the micro SD card size must be at least 8GB; higher capacity SD memory cards may be used but only 8GB will be available at the end of the procedure.

Step by step guide

 * 1) Download any SD images (Ubuntu or Yocto) from the image section of the website http://www.udoo.org/downloads/.
 * 2) Extract the .img file from the .zip file you downloaded into any folder (this path will be referred to as  in the guide).
 * 3) Follow the instructions below for the OS you use:

Write the image on micro SD card Using Linux
From the terminal run: df -h

If the computer used has a slot for SD cards (SD to micro SD adapter needed), insert the card. If not, insert the card into any SD card reader and then connect it to the computer. Note: the microSD card must be formatted using FAT32 File System!

Run again: df -h

The device that had not been listed before is the micro SD card just inserted. The left column will show the device name assigned to the micro SD card. It will have a name similar to “/dev/mmcblk0p1″ or “/dev/sdd1″. The last part of the name (“p1″ or “1″, respectively) is the partition number, but it is necessary to write on the whole micro SD card, not only on one partition. Therefore, it is necessary to remove that part from the name (for example “/dev/mmcblk0″ or “/dev/sdd”) in order to work with the whole micro SD card.

If the micro SD card contains more than one partition, it is necessary to unmount all of these partitions (using the correct name found previously, followed by the letters and numbers identifying the partitions) using the command: e.g. sudo umount /dev/sdd1

Now, write the image on the micro SD card with the command: sudo dd bs=1M if= of=/dev/

Please be sure that you replaced the argument of input file (if=) with the pathof the .img file, and that the device name specified in output file’s argument (of=/dev/) is correct. This is very important, since you could lose all data on the hard drive of the Host PC if  it is usedthe wrong device name. Please also be sure that the device name is that of the whole micro SD card, as described above, not just a partition. (e.g. sdd, not sdds1 or sddp1, or mmcblk0 not mmcblk0p1) e.g. sudo dd bs=1M if=/home//Download/2013-5-28-udoo-ubuntu.img of=/dev/sdd

Once dd completes, run the sync command as root or run sudo sync as a normal user (this will ensure that the write cache is flushed and that it is safe to unmount the micro SD card). Then run: sudo umount /media/

The micro SD card is now ready to be used. Simply, insert it in UDOO’s microSD Card slot and boot the system.

Write the image on micro SD card using Mac OSX
From the terminal run df -h

If the Mac has a slot for SD cards (SD to micro SD adapter needed), insert the card. If not, insert the card into any SD card reader and then connect it to the Mac. Note: the microSD card must be formatted usingFAT32 File System!

Run again df -h

The device that had not been listed before is the microSD card just inserted. The name shown will be that of the filesystem’s partition, for example, /dev/disk3s1. Now consider the raw device name for using the entire disk, by omitting the final “s1″ and replacing “disk” with “rdisk” (considering previous example, use rdisk3, not disk3 nor rdisk3s1). This is very important, since it could result in the loss of all data of the disk of the Mac used, when referring to the wrong device name. Since there could be other SD with different drive names/numbers, like rdisk2 or rdisk4, etc. check again the correct name of the microSD card by using the df -h command both before & after the insertion of the microSD card into the Mac used. e.g. /dev/disk3s1 => /dev/rdisk3

If the microSD card contains more partitions, unmount all of these partitions (use the correct name found previously, followed by letters and numbers that identify the partitions) with the command: sudo diskutil unmount /dev/disk3s1

Now write the image on the microSD card using the command: sudo dd bs=1m if=path_del_file_img of=/dev/

Please be sure that you replaced the argument of input file (if=) with the path to the .img file, and that the device name specified in output file’s argument (of=/dev/) is correct. This is very important, since it could result in the loss of all data of the disk of the Mac used, when referring to the wrong device name.). Please also be sure that the device name is that of the whole micro SD card as described above, not just a partition (for example, rdisk3, not disk3s1).   e.g. sudo dd bs=1m if=/home/user_name/Download/2013-5-28-udoo-ubuntu.img of=/dev/rdisk3

Once dd completes, run the sync command as root or run sudo sync as a normal user (this will ensure that the write cache is flushed and that it is safe to unmount the micro SD card). Then run: sudo diskutil eject /dev/rdisk3

The micro SD card is now ready to be used. Simply, insert it in UDOO’s microSD Card slot and boot the system.

Write the image on micro SD card Using Windows
Download the Win32DiskImager software here and unzip it.

If the PC used has a slot for SD cards (SD to microSD adapter needed), simply insert the card. If not, insert the card into any SD card reader and then connect it to the PC. Note: the microSD card must be formatted using FAT32 File System!

Run the file named Win32DiskImager.exe (with Windows Vista, 7 and 8 right-click the file and select “Run as administrator”).

If the micro SD card (Device) used is not detected automatically, click on the drop down box on the right and select the identifier of the micro SD card that has been plugged in (e.g. [H:\]). Note: the microSD card must be formatted using FAT32 File System!

Please be careful to select the correct drive identifier; if you use the wrong identifier, you can lose all data on the PC's hard disk!

In the Image File box, choose the downloaded .img file and click “Write”. Note: click YES in case it pops up a warning message.

The microSD card is now ready to be used. Simply insert it in UDOO’s microSD Card slot and boot the system.