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* Partition the newly created disk image
* Partition the newly created disk image
<pre>
<pre>
parted -a optimal --script -- f20-minimal.disk unit MiB mklabel msdos mkpart primary 4 24 mkpart primary 24 152 mkpart primary 152 1552 print
parted -a optimal --script -- f20-minimal.disk       \
                              unit MiB               \
                              mklabel msdos           \
                              mkpart primary 4 24     \
                              mkpart primary 24 152   \
                              mkpart primary 152 1552 \
                              print
</pre>
</pre>



Revision as of 02:48, 14 July 2014



OMAP5 uEVM notes

Fedora 20 uENV.txt:

setenv bootm_size 0x20000000
setenv bootargs console=${console} vram=${vram} root=LABEL=_/ ro rootwait rhgb
ext4load mmc 0:3 0x82000000 /boot/vmlinuz-3.14.0-0.rc6.git4.1.fc21.armv7hl
ext4load mmc 0:3 0x88080000 /boot/uInitrd-3.14.0-0.rc6.git4.1.fc21.armv7hl
ext4load mmc 0:3 0x88000000 /boot/dtb-3.14.0-0.rc6.git4.1.fc21.armv7hl/omap5-uevm.dtb
bootz 0x82000000 0x88080000 0x88000000



Fedora 21/rawhide notes

Install MLO and u-boot on non-vfat image: WARNING: BETA NOTES


sudo dd if=MLO           \
        of=/dev/sdz      \
      conv=fsync,notrunc \
      seek=128k

sudo dd if=u-boot.img    \
        of=/dev/sdz      \
     count=2             \
      seek=1             \
      conv=notrunc,fsync \
        bs=384k


F20 notes

  • download the f20 minimal image
wget http://download.fedoraproject.org/pub/fedora/linux/releases/20/Images/armhfp/Fedora-Minimal-VFAT-armhfp-20-1-sda.raw.xz
  • Decompress
unxz -v Fedora-Minimal-VFAT-armhfp-20-1-sda.raw.xz


  • Map the partitions
kpartx -avp _fedora_  Fedora-Minimal-VFAT-armhfp-20-1-sda.raw


  • Extract the rootfs
dd if=/dev/mapper/loop0_fedora_3 \
   of=f20-minimal-rootfs.ext4    \
 conv=fsync


  • Shrink the rootfs image file
e2fsck    -f  f20-minimal-rootfs.ext4 &> /dev/null
resize2fs -M  f20-minimal-rootfs.ext4


  • Create a new f20 disk image file
truncate -s 4G f20-minimal.disk


  • Partition the newly created disk image
parted -a optimal --script -- f20-minimal.disk        \
                              unit MiB                \
                              mklabel msdos           \
                              mkpart primary 4 24     \
                              mkpart primary 24 152   \
                              mkpart primary 152 1552 \
                              print


  • Map the partitions to loop devices
kpartx -avp _remix_ f20-minimal.disk


  • Format the partitions accordingly to the output of the previous kpartx cmd.
mkfs.vfat -n uboot -F 16              /dev/mapper/loop0_remix_1

mkswap -L swap -U $(uuidgen)          /dev/mapper/loop0_remix_2

#mkfs.ext4 -L rootfs -U $(uuidgen) -m0 /dev/mapper/loop0_remix_3


  • Copy the Fedora-20 minimal rootfs to the appropriate partition
dd if=f20-minimal-rootfs.ext4   \
   of=/dev/mapper/loop0_remix_3 \
   bs=4M conv=fsync 


  • Unmap the partition loops devs
kpartx -dvp _remix_ f20-minimal.disk







Tips & Tricks

You can monitor the DD command in an easy one liner.

dd if=/dev/sdc3 of=f20-minimal-rootfs.ext4-ORIG &   while ps -p $! ; do kill -USR1 $! ; sleep 5 ; done

This signals the DD process to spew progress info every five seconds. Especially useful on very slow sdcard, or large data transfers.