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====== Migrating Debian GNU/Linux 4.0 (etch) or later to an AoE target ====== You can either work witha an installation - that is running off a physical disk on a client machine or - a loopback-mounted disk image running as a ''chroot(8)'' environment Install the ''aoetools'' package and a kernel image that includes the ''aoe'' driver, i.e. one of the ''linux-image-2.6.18-*'' drivers that ship with Debian/etch. Create two scripts as shown below * ''/etc/initramfs-tools/hooks/aoetools'' will copy the ''aoe'' kernel module and ''/sbin/aoe-discover'' to the initial ramdisk. * ''/etc/initramfs-tools/scripts/local-top/aoetools'' is copied to the ram disk and run at boot-time, just before the root filesystem is mounted. If the root device string looks like an AoE target, it brings up all recognized Ethernet interfaces and activates the AoE driver. After you have made sure that ''/etc/initramfs-tools/initramfs.conf'' contains the line BUSYBOX=y you can update the initial ramdisk: # update-initramfs -u -k all FIXME Create/update ''/etc/fstab'' FIXME Create/update ''/boot/grub/menu.lst'' If the modifications were applied to a physical disk on the client machine, you can now [[santransfer|transfer]] the contents of your physical disk to the SAN target. If the image you wish to export to client systems was modified directly,, just make the contents of that image [[sanexport|available]]. ==== Hints ==== * If the system hangs before the root device has been mounted, passing ''break=mount'' on the command line will spawn a shell before `scripts/local-top/aoetools' is run. This should allow for further debugging. ===== Configuration files ===== ==== /etc/initramfs-tools/hooks/aoetools ==== <code bash> #!/bin/sh set -e PREREQ="" prereqs() { echo "$PREREQ" } case $1 in prereqs) prereqs exit 0 ;; esac . /usr/share/initramfs-tools/hook-functions [ -x /sbin/aoe-discover ] && copy_exec /sbin/aoe-discover /sbin manual_add_modules aoe </code> ==== /etc/initramfs-tools/scripts/local-top/aoetools ==== <code bash> #!/bin/sh set -e PREREQ="" prereqs() { echo "$PREREQ" } case $1 in prereqs) prereqs exit 0 ;; esac case $ROOT in /dev/etherd/e*) INTERFACES=`awk -F: '/eth[0-9]*:/ { print $1 }' < /proc/net/dev` for i in $INTERFACES; do echo Bringing up interface $i for AoE ifconfig $i up done sleep 5 modprobe aoe aoe-discover ;; esac </code>

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