= Installation on external media (USB drive, SD card) =
[[TOC]]
In this section, it is shown how the installation can be performed on external storage and in a manual fashion. If you plan to install on a SD card, be sure to have read the [wiki:AM/SheevaPlug/PreInstallation preinstallation page] to get the plug booting from there.

== Preparing the external storage ==
Partition the SD card or USB stick. For following this manual we need to create a boot partition of few megabytes size (partition 1, let's say at least 16 mb), a partition for root (partition 2) and a swap partition (if you wish, partition 3). Make sure the first two partitions are of type 83 (Linux) and the swap partition is of type 82 (Swap). Check with
{{{
# fdisk -l /dev/mmcblk0
}}}
Then create filesystems (use ext2 for boot partition!)
{{{
# mkfs.ext2 /dev/mmcblk0p1
# mkfs.ext3 /dev/mmcblk0p2
# mkswap /dev/mmcblk0p3
}}}
Extract the archmobile snapshot on the root partition and move the contents of the /boot directory to the boot partition. Update the /etc/inittab, /etc/securetty, /etc/rc.conf accordingly as seen in the [wiki:AM/SheevaPlug/PostInstallation postinstallation wiki page]. Additionally change the /etc/fstab:
{{{
#
# /etc/fstab: static file system information
#
# <file system>        <dir>         <type>    <options>          <dump> <pass>
none                   /dev/pts      devpts    defaults            0      0
none                   /dev/shm      tmpfs     defaults            0      0
tmpfs                  /var/lock     tmpfs     defaults,size=50m,mode=0755 0 0
#tmpfs                  /var/log      tmpfs     defaults,size=50m,mode=0755 0 0
tmpfs                  /var/run      tmpfs     defaults,size=50m,mode=0755 0 0
tmpfs                  /tmp          tmpfs     defaults,size=100m,mode=1777 0 0
/tmp                   /var/tmp      bind      defaults,bind       0      0
}}}
and add either the SD card devices
{{{
/dev/mmcblk0p2         /             ext3      defaults,noatime    0      1
/dev/mmcblk0p1         /boot         ext2      defaults,noatime,errors=remount-ro 0 1
/dev/mmcblk0p3         swap          swap      defaults            0      0
}}}
or the USB drive devices
{{{
/dev/sda2              /             ext3      defaults,noatime    0      1
/dev/sda1              /boot         ext2      defaults,noatime,errors=remount-ro 0 1
/dev/sda3              swap          swap      defaults            0      0
}}}

== Configure the boot loader ==
Reboot the sheevaplug and press a key in the serial console to interrupt the booting process. Now change the settings for using a mainline kernels:
{{{
setenv mainlineLinux yes
setenv arcNumber 2097
saveenv
}}}
For booting the sheevaplug, you have to configure U-Boot to use the SD card (load the kernel from to boot partition, use root partition as root).
{{{
setenv bootargs_console console=ttyS0,115200
setenv bootargs_root 'root=/dev/mmcblk0p2 rootdelay=10'
setenv bootcmd_mmc 'mmcinit; ext2load mmc 0 0x800000 /uImage'
setenv bootcmd 'setenv bootargs $(bootargs_console) $(bootargs_root); run bootcmd_mmc; bootm 0x00800000'
saveenv
}}}
To use an initial ramdisk, you have to let U-Boot load and execute it. Change the bootcmd_mmc and bootcmd to
{{{
setenv bootcmd_mmc 'mmcinit; ext2load mmc 0 0x0800000 /uInitrd; ext2load mmc 0 0x800000 /uImage'
setenv bootcmd 'setenv bootargs $(bootargs_console) $(bootargs_root); run bootcmd_mmc; bootm 0x800000 0x01200000'
}}}
Please notice that the path to the kernel is /uImage in this case. If you use an USB drive, you need to let U-Boot load the files to memory differently:
{{{
setenv bootargs_console console=ttyS0,115200
setenv bootargs_root 'root=/dev/sda2 rootdelay=10'
setenv bootcmd_usb 'usb start; ext2load usb 0:1 0x800000 /uImage'
setenv bootcmd 'setenv bootargs $(bootargs_console) $(bootargs_root); run bootcmd_usb; bootm 0x800000'
saveenv
}}}

== Booting to archmobile ==
You can then boot by
{{{
run bootcmd
}}}
For the default root password please refer to the description of the snapshot.