diff --git a/board/bananapim1/uInitrd b/board/bananapim1/uInitrd
index d84507ef47..191d4b5f3c 100644
Binary files a/board/bananapim1/uInitrd and b/board/bananapim1/uInitrd differ
diff --git a/board/common/overlay-initramfs/init b/board/common/overlay-initramfs/init
index 5869745d88..301697a9e7 100755
--- a/board/common/overlay-initramfs/init
+++ b/board/common/overlay-initramfs/init
@@ -1,18 +1,20 @@
 #!/bin/sh
 
 PATH=/bin:/sbin:/usr/bin:/usr/sbin
-DISK_TIMEOUT="10"
+DISK_TIMEOUT=10
 
 msg() {
     echo " * $1"
 }
 
+sh
+
 msg "Mounting pseudo filesystems"
 mount -t devtmpfs devtmpfs /dev
 mount -t proc proc /proc
 
 ROOT_DEV=$(cat /proc/cmdline | grep -oE 'root=[/a-z0-9]+' | cut -d '=' -f 2)
-if echo ${ROOT_DEV: -2} | grep -E 'p[0-9]' &>/dev/null; then  # e.g. /dev/mmcblk0p2
+if echo ${ROOT_DEV:-2} | grep -E 'p[0-9]' &>/dev/null; then  # e.g. /dev/mmcblk0p2
     DISK_DEV=${ROOT_DEV:0:$((${#ROOT_DEV}-2))}
     BOOT_DEV=${DISK_DEV}p1
     DATA_DEV=${DISK_DEV}p3
@@ -28,10 +30,10 @@ while true; do
     if [ ${count} -ge ${DISK_TIMEOUT} ]; then
         break
     fi
-    if [ -b ${ROOT_DEV} ]; then
+    if [[ -b ${ROOT_DEV} ]]; then
         break
     fi
-    count=$((${count} + 1))
+    count=$((count + 1))
     sleep 1
 done
 
@@ -41,15 +43,12 @@ msg "Root device is ${ROOT_DEV}"
 msg "Data device is ${DATA_DEV}"
 
 FW_DIR=/data/.fwupdate
-FW_FILE=firmware.img.gz
-FW_FILE_EXTR=firmware.img
+FW_FILE=${FW_DIR}/firmware.img.gz
+FW_FILE_EXTR=${FW_DIR}/firmware.img
 
-LEGACY_FW_DIR=/data/.firmware_update
-LEGACY_FW_FILE_EXTR=firmware
+ROOT_INFO_FILE=${FW_DIR}/root_info
 
-ROOT_INFO_FILE=root_info
-
-on_exit() {
+cleanup_on_exit() {
     msg "Switching to normal boot"
     /remove_initramfs
 
@@ -66,7 +65,7 @@ on_exit() {
     echo 'b' > /proc/sysrq-trigger
 }
 
-trap on_exit EXIT
+trap cleanup_on_exit EXIT
 
 if [ -x /prepare_initramfs ]; then
     msg "Preparing initramfs"
@@ -79,35 +78,39 @@ mount ${BOOT_DEV} /boot
 msg "Mounting data partition"
 mount ${DATA_DEV} /data
 
-if ! [ -r ${FW_DIR}/${FW_FILE_EXTR} ]; then
-    if [ -r ${LEGACY_FW_DIR}/${LEGACY_FW_FILE_EXTR} ]; then
-        msg "Detected legacy firmware path"
-        mkdir -p ${FW_DIR}
-        mv ${LEGACY_FW_DIR}/${LEGACY_FW_FILE_EXTR} ${FW_DIR}/${FW_FILE_EXTR}
-        
-        msg "Computing root partition info"
-        root_start=$(fdisk -l ${FW_DIR}/${FW_FILE_EXTR} | grep ${FW_FILE_EXTR}2 | tr -s ' ' | cut -d ' ' -f 4)
-        root_start=$((${root_start} / 2048))
-        root_size=$(fdisk -l ${FW_DIR}/${FW_FILE_EXTR} | grep ${FW_FILE_EXTR}2 | tr -s ' ' | cut -d ' ' -f 6)
-        root_size=$((${root_size} / 2048))
-        
-        echo ${root_start} ${root_size} > ${FW_DIR}/${ROOT_INFO_FILE}
-    else
-        msg "No firmware found, aborting"
-        exit 1
-    fi
+if ! [[ -r ${FW_FILE_EXTR} ]]; then
+    msg "No firmware found, aborting"
+    exit 1
 fi
 
-if ! [ -r ${FW_DIR}/${ROOT_INFO_FILE} ]; then
+if ! [[ -r ${ROOT_INFO_FILE} ]]; then
     msg "No root partition info, aborting"
     exit 1
 fi
 
 msg "Copying root image"
-root_start=$(cat ${FW_DIR}/${ROOT_INFO_FILE} | cut -d ' ' -f 1)
-root_size=$(cat ${FW_DIR}/${ROOT_INFO_FILE} | cut -d ' ' -f 2)
+root_info=$(cat ${ROOT_INFO_FILE})
+count=0
 
-dd if=${FW_DIR}/${FW_FILE_EXTR} skip=${root_start} of=${ROOT_DEV} bs=1048576 count=${root_size} || exit 1
+for i in ${root_info}; do count=$((count + 1)); done
+
+if [[ ${count} == 3 ]]; then
+    root_start=$(echo ${root_info} | cut -d ' ' -f 1)
+    root_size=$(echo ${root_info} | cut -d ' ' -f 3)
+    root_start=$((root_start / 2048))
+    root_size=$((root_size / 2048))
+
+elif [[ ${count} == 2 ]]; then
+    # compatibility with old info file format
+    root_start=$(echo ${root_info} | cut -d ' ' -f 1)
+    root_size=$(echo ${root_info} | cut -d ' ' -f 2)
+
+else
+    msg "Unrecognized root partition info file format"
+    exit 1
+fi
+
+dd if=${FW_FILE_EXTR} skip=${root_start} of=${ROOT_DEV} bs=1048576 count=${root_size} || exit 1
 
 msg "Cleaning up"
 rm -rf ${FW_DIR}
diff --git a/board/common/overlay/etc/init.d/S72postgresql b/board/common/overlay/etc/init.d/S72postgresql
index b6b61b82ce..b081d457ad 100755
--- a/board/common/overlay/etc/init.d/S72postgresql
+++ b/board/common/overlay/etc/init.d/S72postgresql
@@ -35,7 +35,7 @@ start() {
 	    run_pg_ctl initdb -s -D ${DB_DIR} &>> ${LOG}
 	    test $? == 0 && msg_done || msg_fail
 	    
-        echo "include_if_exists = '/data/etc/postgresql.conf'" >> ${DB_DIR}/postgresql.conf
+        echo "include_if_exists = '${CONF}'" >> ${DB_DIR}/postgresql.conf
     fi
 
     msg_begin "Starting postgresql"
diff --git a/board/common/overlay/etc/modprobe.d/boot-modprobe.conf b/board/common/overlay/etc/modprobe.d/boot-modprobe.conf
new file mode 120000
index 0000000000..581315cf7e
--- /dev/null
+++ b/board/common/overlay/etc/modprobe.d/boot-modprobe.conf
@@ -0,0 +1 @@
+/boot/etc/modprobe.conf
\ No newline at end of file
diff --git a/board/common/overlay/etc/modprobe.d/user-modprobe.conf b/board/common/overlay/etc/modprobe.d/data-modprobe.conf
similarity index 100%
rename from board/common/overlay/etc/modprobe.d/user-modprobe.conf
rename to board/common/overlay/etc/modprobe.d/data-modprobe.conf
diff --git a/board/common/overlay/sbin/fwupdate b/board/common/overlay/sbin/fwupdate
index d9097227eb..ad79d1998a 100755
--- a/board/common/overlay/sbin/fwupdate
+++ b/board/common/overlay/sbin/fwupdate
@@ -5,8 +5,8 @@
 
 function exit_usage() {
     echo "Usage: fwupdate versions [-j]                     (lists available versions, optionally outputting json)"
-    echo "       fwupdate current                           (shows the current version"
-    echo "       fwupdate download <version|url|file>       (downloads a firmware version)"
+    echo "       fwupdate current                           (shows the current version)"
+    echo "       fwupdate download <version|url|file>       (downloads a firmware OS image)"
     echo "       fwupdate extract                           (extracts the downloaded firmware archive)"
     echo "       fwupdate flashboot                         (flashes the boot partition from extracted image)"
     echo "       fwupdate flashreboot                       (prepares for reboot + root partititon flash)"
@@ -26,7 +26,7 @@ function exit_usage() {
     exit 1
 }
 
-if [ -z "$1" ]; then
+if [[ -z "$1" ]]; then
     exit_usage
 fi
 
@@ -40,32 +40,60 @@ SYS_VERSION_FILE=/etc/version
 SYS_BOARD_FILE=/etc/board
 OS_CONF_FILE=/etc/init.d/os_conf
 
-MIN_FREE_DISK=$((500*1024))  # 500 MB
-VER_FILE=version
-ROOT_INFO_FILE=root_info
-BOOT_READY_FILE=boot_flash_ready
-
+MIN_FREE_DISK=500  # MB
 FW_DIR=/data/.fwupdate
-FW_FILE_GZ=firmware.img.gz
-FW_FILE_XZ=firmware.img.xz
-FW_FILE_EXTR=firmware.img
 
-CURL_LOG_FILE=curl.log
-CURL_PID_FILE=curl.pid
+FW_FILE_GZ=${FW_DIR}/firmware.img.gz
+FW_FILE_XZ=${FW_DIR}/firmware.img.xz
+FW_FILE_EXTR=${FW_DIR}/firmware.img
 
-GUNZIP_LOG_FILE=gunzip.log
-GUNZIP_PID_FILE=gunzip.pid
+VER_FILE=${FW_DIR}/version
 
-XZCAT_LOG_FILE=xzcat.log
-XZCAT_PID_FILE=xzcat.pid
+BOOT_INFO_FILE=${FW_DIR}/boot_info
+ROOT_INFO_FILE=${FW_DIR}/root_info
+BOOT_READY_FILE=${FW_DIR}/boot_flash_ready
 
-DD_LOG_FILE=dd.log
-DD_PID_FILE=dd.pid
+TMP_BOOT_DIR=/tmp/fwupdate_boot
+TMP_ROOT_DIR=/tmp/fwupdate_root
+
+CURL_LOG_FILE=${FW_DIR}/curl.log
+CURL_PID_FILE=${FW_DIR}/curl.pid
+
+GUNZIP_LOG_FILE=${FW_DIR}/gunzip.log
+GUNZIP_PID_FILE=${FW_DIR}/gunzip.pid
+
+XZCAT_LOG_FILE=${FW_DIR}/xzcat.log
+XZCAT_PID_FILE=${FW_DIR}/xzcat.pid
+
+DD_LOG_FILE=${FW_DIR}/dd.log
+DD_PID_FILE=${FW_DIR}/dd.pid
+
+BOOT_LOOP="/dev/loop3"
+ROOT_LOOP="/dev/loop4"
 
 source ${OS_CONF_FILE}
 source ${SYS_VERSION_FILE}
 
 
+#### cleanup on exit ####
+
+function cleanup_on_exit() {
+    set +e
+
+    if [[ -f /sbin/reboot.bak ]]; then
+        rm -f /sbin/reboot
+        mv /sbin/reboot.bak /sbin/reboot
+    fi
+    
+    umount ${TMP_BOOT_DIR} 2>/dev/null
+    umount ${TMP_ROOT_DIR} 2>/dev/null
+    losetup -d ${BOOT_LOOP} 2>/dev/null
+    losetup -d ${ROOT_LOOP} 2>/dev/null
+
+    mount -T /etc/fstab.disk -o ro /boot 2>/dev/null
+}
+
+
 #### disk & partition devices ####
 
 BOOT_DEV=$(mount | grep /boot | cut -d ' ' -f 1)
@@ -81,6 +109,84 @@ else
     exit 1
 fi
 
+function reallocate_boot_part() {
+    current_boot_info=$(fdisk --bytes -l -o device,start,end,size ${DISK_DEV} | grep "${BOOT_DEV}")
+    current_boot_info=(${current_boot_info})
+
+    current_root_info=$(fdisk --bytes -l -o device,start,end,size ${DISK_DEV} | grep "${ROOT_DEV}")
+    current_root_info=(${current_root_info})
+
+    boot_info=($(cat ${BOOT_INFO_FILE}))
+
+    if [[ ${current_boot_info[1]} == ${boot_info[0]} ]] && 
+       [[ ${current_boot_info[2]} == ${boot_info[1]} ]]; then
+
+        return  # all good
+    fi
+    
+    echo "reallocating boot partition..."
+    
+    # check overlapping with root partition
+    if [[ ${boot_info[1]} -ge ${current_root_info[1]} ]]; then
+        echo "cannot reallocate boot partition: will overlap with root"
+        return 1
+    fi
+
+    fdisk -w auto ${DISK_DEV} >/dev/null <<END
+d
+1
+n
+p
+1
+${boot_info[0]}
+${boot_info[1]}
+t
+1
+c
+w
+END
+    sync
+}
+
+function reallocate_root_part() {
+    current_root_info=$(fdisk --bytes -l -o device,start,end,size ${DISK_DEV} | grep "${ROOT_DEV}")
+    current_root_info=(${current_root_info})
+
+    current_data_info=$(fdisk --bytes -l -o device,start,end,size ${DISK_DEV} | grep "${DATA_DEV}")
+    current_data_info=(${current_data_info})
+
+    root_info=($(cat ${ROOT_INFO_FILE}))
+
+    if [[ ${current_root_info[1]} == ${root_info[0]} ]] && 
+       [[ ${current_root_info[2]} == ${root_info[1]} ]]; then
+
+        return  # all good
+    fi
+    
+    echo "reallocating root partition..."
+    
+    # check overlapping with data partition
+    if [[ ${root_info[1]} -ge ${current_data_info[1]} ]]; then
+        echo "cannot reallocate root partition: will overlap with data"
+        return 1
+    fi
+
+    fdisk -w auto ${DISK_DEV} >/dev/null <<END
+d
+2
+n
+p
+2
+${root_info[0]}
+${root_info[1]}
+t
+2
+83
+w
+END
+    sync
+}
+
 
 #### versions ####
 
@@ -98,14 +204,14 @@ function show_versions() {
         IFS="|"
         varr=(${version})
         IFS=${OIFS}
-        if [ "${OS_PRERELEASES}" == "false" ] && [ "${varr[1]}" == "true" ]; then
+        if [[ "${OS_PRERELEASES}" == "false" && "${varr[1]}" == "true" ]]; then
             continue  # skip prereleases
         fi
-        if [ "${board}" != "${varr[2]}" ]; then
+        if [[ "${board}" != "${varr[2]}" ]]; then
             continue  # skip other boards
         fi
 
-        if [ "${show_json}" == "true" ]; then
+        if [[ "${show_json}" == "true" ]]; then
             echo "{\"version\": \"${varr[0]}\"," \
                   "\"url\": \"${varr[3]}\"," \
                   "\"board\": \"${varr[2]}\"," \
@@ -131,23 +237,23 @@ function do_download() {
     mkdir -p ${FW_DIR}
 
     # Look for local file first
-    if [ -f "$1" ]; then
+    if [[ -f "$1" ]]; then
         version="custom"
         FNAME=`basename $1`
         FILEEXT=${FNAME##*.}
         DST_FNAME=""
-        if [ "${FILEEXT}" == "xz" ]; then
-            DST_FNAME="${FW_DIR}/${FW_FILE_XZ}"
-        elif [ "${FILEEXT}" == "gz" ]; then
-            DST_FNAME="${FW_DIR}/${FW_FILE_GZ}"
+        if [[ "${FILEEXT}" == "xz" ]]; then
+            DST_FNAME=${FW_FILE_XZ}
+        elif [[ "${FILEEXT}" == "gz" ]]; then
+            DST_FNAME=${FW_FILE_GZ}
         fi
-        if [ -n "${DST_FNAME}" ]; then
+        if [[ -n "${DST_FNAME}" ]]; then
             cp -f $1 ${DST_FNAME}
-            echo ${version} > ${FW_DIR}/${VER_FILE}
+            echo ${version} > ${VER_FILE}
             return
         fi
     fi
-
+    
     board=$(cat ${SYS_BOARD_FILE})
     url=$1
     version=$1
@@ -158,51 +264,51 @@ function do_download() {
         version="custom"
     fi
 
-    if [ -z "${url}" ]; then
+    if [[ -z "${url}" ]]; then
         echo "no such version" 1>&2
         exit 1
     fi
 
     free_disk=$(df /data | tail -n 1 | tr -s ' ' | cut -d ' ' -f 4)
-    if [ "${free_disk}" -lt ${MIN_FREE_DISK} ]; then
+    if [[ "${free_disk}" -lt $((MIN_FREE_DISK * 1024)) ]]; then
         echo "not enough disk space" 1>&2
         exit 1
     fi
 
-    outfile=${FW_DIR}/${FW_FILE_GZ}
+    outfile=${FW_FILE_GZ}
     format=$(echo ${url} | sed -rn 's/.*\.img\.([a-z]+)$/\1/ p')
-    if [ "${format}" == "xz" ]; then
-        outfile=${FW_DIR}/${FW_FILE_XZ}
+    if [[ "${format}" == "xz" ]]; then
+        outfile=${FW_FILE_XZ}
     fi
 
-    echo ${version} > ${FW_DIR}/${VER_FILE}
+    echo ${version} > ${VER_FILE}
 
     curl_opts="-S -f -L"
-    if [ -n "${OS_FIRMWARE_USERNAME}" ]; then
+    if [[ -n "${OS_FIRMWARE_USERNAME}" ]]; then
         curl_opts+=" --user ${OS_FIRMWARE_USERNAME}:${OS_FIRMWARE_PASSWORD}"
     fi
 
-    curl ${curl_opts} -o ${outfile} "${url}" &> ${FW_DIR}/${CURL_LOG_FILE} &
+    curl ${curl_opts} -o ${outfile} "${url}" &> ${CURL_LOG_FILE} &
     pid=$!
-    echo ${pid} > ${FW_DIR}/${CURL_PID_FILE}
+    echo ${pid} > ${CURL_PID_FILE}
     wait ${pid}
     
-    if [ "$?" != 0 ]; then
-        cat ${FW_DIR}/${CURL_LOG_FILE}
+    if [[ "$?" != 0 ]]; then
+        cat ${CURL_LOG_FILE}
         exit 1
     fi
 }
 
 function download_status() {
-    if [ -f ${FW_DIR}/${CURL_PID_FILE} ]; then
-        pid=$(cat ${FW_DIR}/${CURL_PID_FILE})
+    if [[ -f ${CURL_PID_FILE} ]]; then
+        pid=$(cat ${CURL_PID_FILE})
         if kill -0 ${pid} &>/dev/null; then
             echo "running"
             return
         fi
     fi
 
-    if [ -f ${FW_DIR}/${FW_FILE_GZ} -o -f ${FW_DIR}/${FW_FILE_XZ} ]; then
+    if [[ -f ${FW_FILE_GZ} || -f ${FW_FILE_XZ} ]]; then
         echo "done"
     fi
 }
@@ -213,14 +319,17 @@ function download_status() {
 function run_pre_upgrade() {
     which losetup &>/dev/null || return 0
 
-    root_start=$(cat ${FW_DIR}/${ROOT_INFO_FILE} | cut -d ' ' -f 1)
-    tmp_mnt="/tmp/fwupdate_root"
-    loop="/dev/loop4"
-    pre_upgrade="${tmp_mnt}/usr/share/pre-upgrade/*"
+    boot_info=($(cat ${BOOT_INFO_FILE}))
+    root_info=($(cat ${ROOT_INFO_FILE}))
+    pre_upgrade="${TMP_ROOT_DIR}/usr/share/pre-upgrade/*"
+    
+    mkdir -p ${TMP_BOOT_DIR}
+    mkdir -p ${TMP_ROOT_DIR}
+    losetup -o $((boot_info[0] * 512)) ${BOOT_LOOP} ${FW_FILE_EXTR}
+    losetup -o $((root_info[0] * 512)) ${ROOT_LOOP} ${FW_FILE_EXTR}
+    mount ${BOOT_LOOP} ${TMP_BOOT_DIR}
+    mount ${ROOT_LOOP} ${TMP_ROOT_DIR}
     
-    mkdir -p ${tmp_mnt}
-    losetup -o $((root_start * 1024 * 1024)) ${loop} ${FW_DIR}/${FW_FILE_EXTR}
-    mount ${loop} ${tmp_mnt}
     if [[ -d ${pre_upgrade} ]]; then
         for script in ${pre_upgrade}/*.sh; do
             echo "running pre-upgrade script $(basename ${script})"
@@ -234,37 +343,41 @@ function run_pre_upgrade() {
         done
     fi
 
-    umount ${tmp_mnt}
-    losetup -d ${loop}
+    umount ${TMP_BOOT_DIR}
+    umount ${TMP_ROOT_DIR}
+    losetup -d ${BOOT_LOOP}
+    losetup -d ${ROOT_LOOP}
 }
 
 function do_extract() {
-    echo "extracting..."
-    
-    rm -f ${FW_DIR}/${FW_FILE_EXTR}
-    rm -f ${FW_DIR}/${BOOT_READY_FILE}
-
-    if ! [ -f ${FW_DIR}/${FW_FILE_GZ} -o -f ${FW_DIR}/${FW_FILE_XZ} ]; then
+    if ! [[ -f ${FW_FILE_GZ} || -f ${FW_FILE_XZ} ]]; then
         echo "firmware file not downloaded" 1>&2
         exit 1
     fi
+    
+    rm -f ${FW_FILE_EXTR}
+    rm -f ${BOOT_READY_FILE}
+
+    echo "extracting..."
+    
+    trap cleanup_on_exit EXIT
 
     format="gz"
-    if [ -f ${FW_DIR}/${FW_FILE_XZ} ]; then
+    if [[ -f ${FW_FILE_XZ} ]]; then
         format="xz"
     fi
 
-    rm -f ${FW_DIR}/${FW_FILE_EXTR}
-    rm -f ${FW_DIR}/${GUNZIP_PID_FILE} ${FW_DIR}/${XZCAT_PID_FILE}
+    rm -f ${FW_FILE_EXTR}
+    rm -f ${GUNZIP_PID_FILE} ${XZCAT_PID_FILE}
 
-    if [ "${format}" == "xz" ]; then
-        DECOMPRESS_LOG_FILE=${FW_DIR}/${XZCAT_LOG_FILE}
-        DECOMPRESS_PID_FILE=${FW_DIR}/${XZCAT_PID_FILE}
-        xzcat ${FW_DIR}/${FW_FILE_XZ} > ${FW_DIR}/${FW_FILE_EXTR} 2>${FW_DIR}/${XZCAT_LOG_FILE} &
-    elif [ "${format}" == "gz" ]; then
-        DECOMPRESS_LOG_FILE=${FW_DIR}/${GUNZIP_LOG_FILE}
-        DECOMPRESS_PID_FILE=${FW_DIR}/${GUNZIP_PID_FILE}
-        gunzip -k -c ${FW_DIR}/${FW_FILE_GZ} > ${FW_DIR}/${FW_FILE_EXTR} 2>${FW_DIR}/${GUNZIP_LOG_FILE} &
+    if [[ "${format}" == "xz" ]]; then
+        DECOMPRESS_LOG_FILE=${XZCAT_LOG_FILE}
+        DECOMPRESS_PID_FILE=${XZCAT_PID_FILE}
+        xzcat ${FW_FILE_XZ} > ${FW_FILE_EXTR} 2>${XZCAT_LOG_FILE} &
+    elif [[ "${format}" == "gz" ]]; then
+        DECOMPRESS_LOG_FILE=${GUNZIP_LOG_FILE}
+        DECOMPRESS_PID_FILE=${GUNZIP_PID_FILE}
+        gunzip -k -c ${FW_FILE_GZ} > ${FW_FILE_EXTR} 2>${GUNZIP_LOG_FILE} &
     else
         echo "firmware compression format ${format} not supported" 1>&2
         exit 1
@@ -274,32 +387,47 @@ function do_extract() {
     echo ${pid} > ${DECOMPRESS_PID_FILE}
     wait ${pid}
 
-    if [ "$?" != 0 ]; then
+    if [[ "$?" != 0 ]]; then
         cat ${DECOMPRESS_LOG_FILE}
         exit 1
     fi
     
     # TODO verify hash
     
+    boot_info=$(fdisk --bytes -l -o device,start,end,size ${FW_FILE_EXTR} | grep "${FW_FILE_EXTR}1")
+    boot_info=(${boot_info})
+    boot_start=${boot_info[1]}
+    boot_end=${boot_info[2]}
+    boot_size=$((boot_info[3] / 512))
+
+    root_info=$(fdisk --bytes -l -o device,start,end,size ${FW_FILE_EXTR} | grep "${FW_FILE_EXTR}2")
+    root_info=(${root_info})
+    root_start=${root_info[1]}
+    root_end=${root_info[2]}
+    root_size=$((root_info[3] / 512))
+    
+    echo ${boot_start} ${boot_end} ${boot_size} > ${BOOT_INFO_FILE}
+    echo ${root_start} ${root_end} ${root_size} > ${ROOT_INFO_FILE}
+
     run_pre_upgrade
 }
 
 function extract_status() {
-    if [ -f ${FW_DIR}/${XZCAT_PID_FILE} ]; then
-        pid=$(cat ${FW_DIR}/${XZCAT_PID_FILE})
+    if [[ -f ${XZCAT_PID_FILE} ]]; then
+        pid=$(cat ${XZCAT_PID_FILE})
         if kill -0 ${pid} &>/dev/null; then
             echo "running"
             return
         fi
-    elif [ -f ${FW_DIR}/${GUNZIP_PID_FILE} ]; then
-        pid=$(cat ${FW_DIR}/${GUNZIP_PID_FILE})
+    elif [[ -f ${GUNZIP_PID_FILE} ]]; then
+        pid=$(cat ${GUNZIP_PID_FILE})
         if kill -0 ${pid} &>/dev/null; then
             echo "running"
             return
         fi
     fi
 
-    if [ -f ${FW_DIR}/${FW_FILE_EXTR} ]; then
+    if [[ -f ${FW_FILE_EXTR} && -f ${ROOT_INFO_FILE} ]]; then
         echo "done"
     fi
 }
@@ -307,76 +435,34 @@ function extract_status() {
 
 #### flash boot ####
 
-function reallocate_boot_part() {
-    boot_info=$(fdisk --bytes -l -o device,start,end,size ${DISK_DEV} | grep "${BOOT_DEV}")
-    boot_info=(${boot_info})
-
-    root_info=$(fdisk --bytes -l -o device,start,end,size ${DISK_DEV} | grep "${ROOT_DEV}")
-    root_info=(${root_info})
-
-    fw_boot_info=$(fdisk --bytes -l -o device,start,end,size ${FW_DIR}/${FW_FILE_EXTR} | grep "${FW_FILE_EXTR}1")
-    fw_boot_info=(${fw_boot_info})
-
-    if [[ ${boot_info[1]} == ${fw_boot_info[1]} ]] && 
-       [[ ${boot_info[2]} == ${fw_boot_info[2]} ]]; then
-
-        return  # all good
-    fi
-    
-    echo "reallocating boot partition..."
-    
-    # check overlapping with root partition
-    if [[ ${fw_boot_info[2]} -ge ${root_info[1]} ]]; then
-        echo "cannot reallocate boot partition: will overlap with root"
+function do_flash_boot() {
+    if [[ ! -f ${FW_FILE_EXTR} ]]; then
+        echo "extracted firmware not present"
         return 1
     fi
 
-    fdisk -w auto ${DISK_DEV} >/dev/null <<END
-d
-1
-n
-p
-1
-${fw_boot_info[1]}
-${fw_boot_info[2]}
-w
-END
-    sync
-}
-
-function do_flash_boot() {
     echo "flashing boot..."
     
-    rm -f ${FW_DIR}/${BOOT_READY_FILE}
+    trap cleanup_on_exit EXIT
+    
+    rm -f ${BOOT_READY_FILE}
 
     board=$(cat ${SYS_BOARD_FILE})
+    boot_info=($(cat ${BOOT_INFO_FILE}))
 
     cp -r /boot ${FW_DIR}/old_boot
     umount /boot
-    trap flash_cleanup EXIT
 
     # prevent unwanted reboots during upgrade
     mount -o remount,rw /
     mv /sbin/reboot /sbin/reboot.bak
     ln -s /bin/true /sbin/reboot
     
-    boot_info=$(fdisk --bytes -l -o device,start,end,size ${FW_DIR}/${FW_FILE_EXTR} | grep "${FW_FILE_EXTR}1")
-    boot_info=(${boot_info})
-    boot_start=$((${boot_info[1]} / 2048))  # in MB
-    boot_size=$((${boot_info[3]} / 1048576))  # in MB
-
-    root_info=$(fdisk --bytes -l -o device,start,end,size ${FW_DIR}/${FW_FILE_EXTR} | grep "${FW_FILE_EXTR}2")
-    root_info=(${root_info})
-    root_start=$((${root_info[1]} / 2048))  # in MB
-    root_size=$((${root_info[3]} / 1048576))  # in MB
-    
-    echo ${root_start} ${root_size} > ${FW_DIR}/${ROOT_INFO_FILE}
-    
     reallocate_boot_part
 
-    dd if=${FW_DIR}/${FW_FILE_EXTR} skip=${boot_start} of=${BOOT_DEV} bs=1048576 count=${boot_size} &>${FW_DIR}/${DD_LOG_FILE} &
+    dd if=${FW_FILE_EXTR} skip=$((boot_info[0] / 2048)) of=${BOOT_DEV} bs=1048576 count=$((boot_info[2] / 2048)) &>${DD_LOG_FILE} &
     pid=$!
-    echo ${pid} > ${FW_DIR}/${DD_PID_FILE}
+    echo ${pid} > ${DD_PID_FILE}
     wait ${pid}
 
     mount -T /etc/fstab.disk -o rw /boot
@@ -384,92 +470,48 @@ function do_flash_boot() {
     # the /usr/libexec/fw-restore-boot-cfg script, if present, takes the old (backup) boot dir as argument
     # and should restore any /boot configuration that needs to be preserved across updates
     # from the old boot dir to the current (new) /boot dir
-    if [ -x /usr/libexec/fw-restore-boot-cfg ]; then
+    if [[ -x /usr/libexec/fw-restore-boot-cfg ]]; then
         /usr/libexec/fw-restore-boot-cfg ${FW_DIR}/old_boot 2>/dev/null || true
     fi
-    touch ${FW_DIR}/${BOOT_READY_FILE}
+    touch ${BOOT_READY_FILE}
 }
 
 function flash_boot_status() {
-    if [ -f ${FW_DIR}/${DD_PID_FILE} ]; then
-        pid=$(cat ${FW_DIR}/${DD_PID_FILE})
+    if [[ -f ${DD_PID_FILE} ]]; then
+        pid=$(cat ${DD_PID_FILE})
         if kill -0 ${pid} &>/dev/null; then
             echo "running"
             return
         fi
     fi
 
-    if [ -f ${FW_DIR}/${BOOT_READY_FILE} ]; then
+    if [[ -f ${BOOT_READY_FILE} ]]; then
         echo "done"
     fi
 }
 
-function flash_cleanup() {
-    if [ -f /sbin/reboot.bak ]; then
-        rm -f /sbin/reboot
-        mv /sbin/reboot.bak /sbin/reboot
-    fi
-    
-    mount /boot 2>/dev/null
-}
-
 
 #### flash reboot ####
 
-function reallocate_root_part() {
-    root_info=$(fdisk --bytes -l -o device,start,end,size ${DISK_DEV} | grep "${ROOT_DEV}")
-    root_info=(${root_info})
-
-    data_info=$(fdisk --bytes -l -o device,start,end,size ${DISK_DEV} | grep "${DATA_DEV}")
-    data_info=(${data_info})
-
-    fw_root_info=$(fdisk --bytes -l -o device,start,end,size ${FW_DIR}/${FW_FILE_EXTR} | grep "${FW_FILE_EXTR}2")
-    fw_root_info=(${fw_root_info})
-
-    if [[ ${root_info[1]} == ${fw_root_info[1]} ]] && 
-       [[ ${root_info[2]} == ${fw_root_info[2]} ]]; then
-
-        return  # all good
-    fi
-    
-    echo "reallocating root partition..."
-    
-    # check overlapping with data partition
-    if [[ ${fw_root_info[2]} -ge ${data_info[1]} ]]; then
-        echo "cannot reallocate root partition: will overlap with data"
-        return 1
-    fi
-
-    fdisk -w auto ${DISK_DEV} >/dev/null <<END
-d
-2
-n
-p
-2
-${fw_root_info[1]}
-${fw_root_info[2]}
-w
-END
-    sync
-}
-
 function do_flash_reboot() {
-    if [[ ! -f ${FW_DIR}/${ROOT_INFO_FILE} ]]; then
-        echo "extracted firmware not present"
+    if [[ ! -f ${ROOT_INFO_FILE} ]]; then
+        echo "root partition info file not present"
         return 1
     fi
     
+    echo "preparing for reboot..."
+    
+    trap cleanup_on_exit EXIT
+    
     reallocate_root_part
 
-    echo "preparing for reboot..."
-
     board=$(cat ${SYS_BOARD_FILE})
     
     # the /usr/libexec/fw-prepare-boot script should be present and should
     # make the necessary changes to the current boot configuration so that
     # the firmware update initramfs will be used by the next boot
     mount -o remount,rw /boot
-    if [ -x /usr/libexec/fw-prepare-boot ]; then
+    if [[ -x /usr/libexec/fw-prepare-boot ]]; then
         /usr/libexec/fw-prepare-boot
     fi
 
@@ -485,7 +527,7 @@ function do_flash_reboot() {
 #### status ####
 
 function new_version() {
-    cat ${FW_DIR}/${VER_FILE}
+    cat ${VER_FILE}
 }
 
 function backup_conf() {
@@ -495,28 +537,28 @@ function backup_conf() {
 
 function show_status() {
     status=$(flash_boot_status)
-    if [ "${status}" == "running" ]; then
+    if [[ "${status}" == "running" ]]; then
         echo "flashing boot $(new_version)"
         return
-    elif [ "${status}" == "done" ]; then
+    elif [[ "${status}" == "done" ]]; then
         echo "boot ready $(new_version)"
         return
     fi
 
     status=$(extract_status)
-    if [ "${status}" == "running" ]; then
+    if [[ "${status}" == "running" ]]; then
         echo "extracting $(new_version)"
         return
-    elif [ "${status}" == "done" ]; then
+    elif [[ "${status}" == "done" ]]; then
         echo "extracted $(new_version)"
         return
     fi
     
     status=$(download_status)
-    if [ "${status}" == "running" ]; then
+    if [[ "${status}" == "running" ]]; then
         echo "downloading $(new_version)"
         return
-    elif [ -n "${status}" ]; then
+    elif [[ -n "${status}" ]]; then
         echo "downloaded $(new_version)"
         return
     fi
@@ -557,7 +599,7 @@ case "$1" in
         ;;
 
     download)
-        if [ -z "$2" ]; then
+        if [[ -z "$2" ]]; then
             exit_usage
         fi
 
@@ -584,7 +626,7 @@ case "$1" in
         ;;
 
     upgrade)
-        if [ -z "$2" ]; then
+        if [[ -z "$2" ]]; then
             exit_usage
         fi
 
diff --git a/board/nanopineo/uInitrd b/board/nanopineo/uInitrd
index 780d359b73..dcb87d65f4 100644
Binary files a/board/nanopineo/uInitrd and b/board/nanopineo/uInitrd differ
diff --git a/board/nanopineo2/uInitrd b/board/nanopineo2/uInitrd
index 13a7fa3c37..33ac23c3ce 100644
Binary files a/board/nanopineo2/uInitrd and b/board/nanopineo2/uInitrd differ
diff --git a/board/odroidc1/uInitrd b/board/odroidc1/uInitrd
index b884bec830..594485d7b4 100644
Binary files a/board/odroidc1/uInitrd and b/board/odroidc1/uInitrd differ
diff --git a/board/odroidc2/uInitrd b/board/odroidc2/uInitrd
index b4733001a5..17b5ea1f72 100644
Binary files a/board/odroidc2/uInitrd and b/board/odroidc2/uInitrd differ
diff --git a/board/odroidxu4/uInitrd b/board/odroidxu4/uInitrd
index 84637eb7fa..e4e6eb1120 100644
Binary files a/board/odroidxu4/uInitrd and b/board/odroidxu4/uInitrd differ
diff --git a/board/orangepione/uInitrd b/board/orangepione/uInitrd
index 4110d1bad8..fa6123ff3a 100644
Binary files a/board/orangepione/uInitrd and b/board/orangepione/uInitrd differ
diff --git a/board/pine64/uInitrd b/board/pine64/uInitrd
index 09cb6be55c..baf11a00fc 100644
Binary files a/board/pine64/uInitrd and b/board/pine64/uInitrd differ
diff --git a/board/raspberrypi/cpinitramfs.sh b/board/raspberrypi/cpinitramfs.sh
index 165ff01703..9965c2aaa6 100755
--- a/board/raspberrypi/cpinitramfs.sh
+++ b/board/raspberrypi/cpinitramfs.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
 
-cp ${IMG_DIR}/rootfs.cpio.gz ${BOARD_DIR}/fwupdater.gz
+cp ${IMG_DIR}/rootfs.cpio.gz ${BOARD_DIR}/initrd.gz
+cp ${IMG_DIR}/rootfs.cpio.gz ${BOARD_DIR}/fwupdater.gz  # for compatibility
 
diff --git a/board/raspberrypi/fwupdater.gz b/board/raspberrypi/fwupdater.gz
index ebd0c3d649..5392dabf2b 100644
Binary files a/board/raspberrypi/fwupdater.gz and b/board/raspberrypi/fwupdater.gz differ
diff --git a/board/raspberrypi/initrd.gz b/board/raspberrypi/initrd.gz
new file mode 100644
index 0000000000..5392dabf2b
Binary files /dev/null and b/board/raspberrypi/initrd.gz differ
diff --git a/board/raspberrypi/overlay/usr/libexec/fw-prepare-boot b/board/raspberrypi/overlay/usr/libexec/fw-prepare-boot
index e930649d1c..e372abdb87 100755
--- a/board/raspberrypi/overlay/usr/libexec/fw-prepare-boot
+++ b/board/raspberrypi/overlay/usr/libexec/fw-prepare-boot
@@ -1,5 +1,5 @@
 #!/bin/bash
 
 echo >> /boot/config.txt
-echo "initramfs fwupdater.gz" >> /boot/config.txt
+echo "initramfs initrd.gz" >> /boot/config.txt
 
diff --git a/board/raspberrypi2/fwupdater.gz b/board/raspberrypi2/fwupdater.gz
index 5cc053dcd8..78f3ccf01e 100644
Binary files a/board/raspberrypi2/fwupdater.gz and b/board/raspberrypi2/fwupdater.gz differ
diff --git a/board/raspberrypi2/initrd.gz b/board/raspberrypi2/initrd.gz
new file mode 100644
index 0000000000..78f3ccf01e
Binary files /dev/null and b/board/raspberrypi2/initrd.gz differ
diff --git a/board/raspberrypi2/overlay/usr/libexec/fw-prepare-boot b/board/raspberrypi2/overlay/usr/libexec/fw-prepare-boot
index e930649d1c..e372abdb87 100755
--- a/board/raspberrypi2/overlay/usr/libexec/fw-prepare-boot
+++ b/board/raspberrypi2/overlay/usr/libexec/fw-prepare-boot
@@ -1,5 +1,5 @@
 #!/bin/bash
 
 echo >> /boot/config.txt
-echo "initramfs fwupdater.gz" >> /boot/config.txt
+echo "initramfs initrd.gz" >> /boot/config.txt
 
diff --git a/board/raspberrypi3/fwupdater.gz b/board/raspberrypi3/fwupdater.gz
index ac47e69edf..36ddbb3b57 100644
Binary files a/board/raspberrypi3/fwupdater.gz and b/board/raspberrypi3/fwupdater.gz differ
diff --git a/board/raspberrypi3/initrd.gz b/board/raspberrypi3/initrd.gz
new file mode 100644
index 0000000000..36ddbb3b57
Binary files /dev/null and b/board/raspberrypi3/initrd.gz differ
diff --git a/board/raspberrypi3/overlay/usr/libexec/fw-prepare-boot b/board/raspberrypi3/overlay/usr/libexec/fw-prepare-boot
index e930649d1c..e372abdb87 100755
--- a/board/raspberrypi3/overlay/usr/libexec/fw-prepare-boot
+++ b/board/raspberrypi3/overlay/usr/libexec/fw-prepare-boot
@@ -1,5 +1,5 @@
 #!/bin/bash
 
 echo >> /boot/config.txt
-echo "initramfs fwupdater.gz" >> /boot/config.txt
+echo "initramfs initrd.gz" >> /boot/config.txt
 
diff --git a/board/tinkerboard/initrd.gz b/board/tinkerboard/initrd.gz
index 1c7648c8a5..a8b440bdae 100644
Binary files a/board/tinkerboard/initrd.gz and b/board/tinkerboard/initrd.gz differ
diff --git a/configs/raspberrypi2_initramfs_defconfig b/configs/raspberrypi2_initramfs_defconfig
index 4bb8992d15..5f6512aed9 100644
--- a/configs/raspberrypi2_initramfs_defconfig
+++ b/configs/raspberrypi2_initramfs_defconfig
@@ -1,14 +1,10 @@
 BR2_arm=y
-BR2_arm1176jzf_s=y
+BR2_cortex_a7=y
+BR2_ARM_FPU_NEON_VFPV4=y
 BR2_CCACHE=y
-BR2_CCACHE_DIR="$(TOPDIR)/.buildroot-ccache-raspberrypi-initramfs"
+BR2_CCACHE_DIR="$(TOPDIR)/.buildroot-ccache-raspberrypi2-initramfs"
 BR2_OPTIMIZE_2=y
-BR2_STATIC_LIBS=y
-BR2_KERNEL_HEADERS_4_4=y
-# BR2_UCLIBC_INSTALL_UTILS is not set
-BR2_BINUTILS_VERSION_2_31_X=y
-BR2_GCC_VERSION_5_X=y
-BR2_TOOLCHAIN_BUILDROOT_CXX=y
+BR2_TOOLCHAIN_EXTERNAL=y
 BR2_TARGET_OPTIMIZATION="-pipe"
 BR2_TARGET_GENERIC_HOSTNAME=""
 BR2_TARGET_GENERIC_ISSUE=""
diff --git a/configs/raspberrypi3_initramfs_defconfig b/configs/raspberrypi3_initramfs_defconfig
index 4bb8992d15..7f50bf393e 100644
--- a/configs/raspberrypi3_initramfs_defconfig
+++ b/configs/raspberrypi3_initramfs_defconfig
@@ -1,14 +1,10 @@
 BR2_arm=y
-BR2_arm1176jzf_s=y
+BR2_cortex_a7=y
+BR2_ARM_FPU_NEON_VFPV4=y
 BR2_CCACHE=y
-BR2_CCACHE_DIR="$(TOPDIR)/.buildroot-ccache-raspberrypi-initramfs"
+BR2_CCACHE_DIR="$(TOPDIR)/.buildroot-ccache-raspberrypi3-initramfs"
 BR2_OPTIMIZE_2=y
-BR2_STATIC_LIBS=y
-BR2_KERNEL_HEADERS_4_4=y
-# BR2_UCLIBC_INSTALL_UTILS is not set
-BR2_BINUTILS_VERSION_2_31_X=y
-BR2_GCC_VERSION_5_X=y
-BR2_TOOLCHAIN_BUILDROOT_CXX=y
+BR2_TOOLCHAIN_EXTERNAL=y
 BR2_TARGET_OPTIMIZATION="-pipe"
 BR2_TARGET_GENERIC_HOSTNAME=""
 BR2_TARGET_GENERIC_ISSUE=""