[Sony Ericsson Xperia Neo, Pro] jarekgol:
So it's nothing new, but solutions like "Link2SD", "Folder Mount" seems to don't work.

When I install for example AcrobatReader, Link2SD tells me that about 100% is linked, but still internal storage was decreased about 20MB-30MB - so I think that doesn't work.

I make some tryings on my own, broke system on my phone, upload another, make another tryings and got some reboots etc...

I want to move whole data partition to SD. Maybe someone know ready to use ROM which have that? Maybe it's very bad idea, but why?

Here is some details about phone:

Xperia Neo V, cm-10-20131006-NIGHTLY-haida (but I'm not relevant to it), unlocked bootloader.

(I cant post pictures....)

mount

rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
/dev/block/mtdblock0 /system yaffs2 ro,relatime 0 0
/dev/block/mtdblock3 /data yaffs2 rw,nosuid,nodev,relatime 0 0
/dev/block/mtdblock2 /cache yaffs2 rw,nosuid,nodev,relatime 0 0
/dev/block/mmcblk0p2 /data/sdext2 ext2 rw,relatime,errors=continue 0 0
/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0
/dev/block/vold/179:1 /storage/sdcard0 vfat rw,dirsync,relatime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
/dev/block/vold/179:1 /mnt/secure/asec vfat rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
tmpfs /storage/sdcard0/.android_secure tmpfs ro,relatime,size=0k,mode=000 0 0

df

Filesystem Size Used Free Blksize
/dev 179.4M 48K 179.4M 4096
/mnt/asec 179.4M 0K 179.4M 4096
/mnt/obb 179.4M 0K 179.4M 4096
/system 400M 360.6M 39.4M 4096
/data 420M 132.1M 287.9M 4096
/cache 101.5M 73.7M 27.8M 4096
/data/sdext2 1.4G 135.5M 1.3G 4096
/storage/sdcard0 377.2M 93.9M 283.3M 4096
/mnt/secure/asec 377.2M 93.9M 283.3M 4096

mtd

dev: size erasesize name
mtd0: 19000000 00020000 "system"
mtd1: 00600000 00020000 "appslog"
mtd2: 06580000 00020000 "cache"
mtd3: 1a400000 00020000 "userdata"

vold.fstab

## Vold 2.0 fstab for Mogami
#
## - San Mehat (san@android.com)
##

#######################
## Regular device mount
##
## Format: dev_mount <label> <mount_point> <part> <sysfs_path1...>
## label - Label for the volume
## mount_point - Where the volume will be mounted
## part - Partition # (1 based), or 'auto' for first usable partition.
## <sysfs_path> - List of sysfs paths to source devices
######################

# Mounts the first usable partition of the specified device
dev_mount sdcard /storage/sdcard0 auto /devices/platform/msm_sdcc.4/mmc_host/mmc1

init.rc

# Copyright (C) 2012 The Android Open Source Project
#
# IMPORTANT: Do not create world writable files or directories.
# This is a common source of Android security bugs.
#

import /init.${ro.hardware}.rc
import /init.usb.rc
import /init.trace.rc

on early-init
# Set init and its forked children's oom_adj.
write /proc/1/oom_adj -16

start ueventd

# create mountpoints
mkdir /mnt 0775 root system

on init

sysclktz 0

loglevel 3

# setup the global environment
export PATH /sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin
export LD_LIBRARY_PATH /vendor/lib:/system/lib
export ANDROID_BOOTLOGO 1
export ANDROID_ROOT /system
export ANDROID_ASSETS /system/app
export ANDROID_DATA /data
export ASEC_MOUNTPOINT /mnt/asec
export LOOP_MOUNTPOINT /mnt/obb
export BOOTCLASSPATH /system/framework/core.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/framework2.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar

# Backward compatibility
symlink /system/etc /etc
symlink /sys/kernel/debug /d

# Right now vendor lives on the same filesystem as system,
# but someday that may change.
symlink /system/vendor /vendor

# Create cgroup mount point for cpu accounting
mkdir /acct
mount cgroup none /acct cpuacct
mkdir /acct/uid

mkdir /system
mkdir /data 0771 system system
mkdir /cache 0771 system cache
mkdir /config 0500 root root

# Directory for putting things only root should see.
mkdir /mnt/secure 0700 root root

# Directory for staging bindmounts
mkdir /mnt/secure/staging 0700 root root

# Directory-target for where the secure container
# imagefile directory will be bind-mounted
mkdir /mnt/secure/asec 0700 root root

# Secure container public mount points.
mkdir /mnt/asec 0700 root system
mount tmpfs tmpfs /mnt/asec mode=0755,gid=1000

# Filesystem image public mount points.
mkdir /mnt/obb 0700 root system
mount tmpfs tmpfs /mnt/obb mode=0755,gid=1000

write /proc/sys/kernel/panic_on_oops 1
write /proc/sys/kernel/hung_task_timeout_secs 0
write /proc/cpu/alignment 4
write /proc/sys/kernel/sched_latency_ns 10000000
write /proc/sys/kernel/sched_wakeup_granularity_ns 2000000
write /proc/sys/kernel/sched_compat_yield 1
write /proc/sys/kernel/sched_child_runs_first 0
write /proc/sys/kernel/randomize_va_space 2
write /proc/sys/kernel/kptr_restrict 2
write /proc/sys/kernel/dmesg_restrict 1
write /proc/sys/vm/mmap_min_addr 32768
write /proc/sys/kernel/sched_rt_runtime_us 950000
write /proc/sys/kernel/sched_rt_period_us 1000000

# Create cgroup mount points for process groups
mkdir /dev/cpuctl
mount cgroup none /dev/cpuctl cpu
chown system system /dev/cpuctl
chown system system /dev/cpuctl/tasks
chmod 0660 /dev/cpuctl/tasks
write /dev/cpuctl/cpu.shares 1024
write /dev/cpuctl/cpu.rt_runtime_us 950000
write /dev/cpuctl/cpu.rt_period_us 1000000

mkdir /dev/cpuctl/apps
chown system system /dev/cpuctl/apps/tasks
chmod 0666 /dev/cpuctl/apps/tasks
write /dev/cpuctl/apps/cpu.shares 1024
write /dev/cpuctl/apps/cpu.rt_runtime_us 800000
write /dev/cpuctl/apps/cpu.rt_period_us 1000000

mkdir /dev/cpuctl/apps/bg_non_interactive
chown system system /dev/cpuctl/apps/bg_non_interactive/tasks
chmod 0666 /dev/cpuctl/apps/bg_non_interactive/tasks
# 5.0 %
write /dev/cpuctl/apps/bg_non_interactive/cpu.shares 52
write /dev/cpuctl/apps/bg_non_interactive/cpu.rt_runtime_us 700000
write /dev/cpuctl/apps/bg_non_interactive/cpu.rt_period_us 1000000

# Allow everybody to read the xt_qtaguid resource tracking misc dev.
# This is needed by any process that uses socket tagging.
chmod 0644 /dev/xt_qtaguid

on fs
# mount mtd partitions
# Mount /system rw first to give the filesystem a chance to save a checkpoint
mount yaffs2 mtd@system /system
mount yaffs2 mtd@system /system ro remount
mount yaffs2 mtd@userdata /data nosuid nodev
mount yaffs2 mtd@cache /cache nosuid nodev

on post-fs
# once everything is setup, no need to modify /
mount rootfs rootfs / ro remount

# We chown/chmod /cache again so because mount is run as root + defaults
chown system cache /cache
chmod 0771 /cache

# This may have been created by the recovery system with odd permissions
chown system cache /cache/recovery
chmod 0770 /cache/recovery

#change permissions on vmallocinfo so we can grab it from bugreports
chown root log /proc/vmallocinfo
chmod 0440 /proc/vmallocinfo

#change permissions on kmsg & sysrq-trigger so bugreports can grab kthread stacks
chown root system /proc/kmsg
chmod 0440 /proc/kmsg
chown root system /proc/sysrq-trigger
chmod 0220 /proc/sysrq-trigger

# create the lost+found directories, so as to enforce our permissions
mkdir /cache/lost+found 0770 root root

on post-fs-data
# We chown/chmod /data again so because mount is run as root + defaults
chown system system /data
chmod 0771 /data

# Create dump dir and collect dumps.
# Do this before we mount cache so eventually we can use cache for
# storing dumps on platforms which do not have a dedicated dump partition.
mkdir /data/dontpanic 0750 root log

# Collect apanic data, free resources and re-arm trigger
copy /proc/apanic_console /data/dontpanic/apanic_console
chown root log /data/dontpanic/apanic_console
chmod 0640 /data/dontpanic/apanic_console

copy /proc/apanic_threads /data/dontpanic/apanic_threads
chown root log /data/dontpanic/apanic_threads
chmod 0640 /data/dontpanic/apanic_threads

write /proc/apanic_console 1

# create basic filesystem structure
mkdir /data/misc 01771 system misc
mkdir /data/misc/bluetoothd 0770 bluetooth bluetooth
mkdir /data/misc/bluetooth 0770 system system
mkdir /data/misc/keystore 0700 keystore keystore
mkdir /data/misc/keychain 0771 system system
mkdir /data/misc/vpn 0770 system vpn
mkdir /data/misc/systemkeys 0700 system system
# give system access to wpa_supplicant.conf for backup and restore
mkdir /data/misc/wifi 0770 wifi wifi
chmod 0660 /data/misc/wifi/wpa_supplicant.conf
mkdir /data/local 0751 root root

# For security reasons, /data/local/tmp should always be empty.
# Do not place files or directories in /data/local/tmp
mkdir /data/local/tmp 0771 shell shell
mkdir /data/data 0771 system system
mkdir /data/app-private 0771 system system
mkdir /data/app-asec 0700 root root
mkdir /data/app 0771 system system
mkdir /data/property 0700 root root
mkdir /data/ssh 0750 root shell
mkdir /data/ssh/empty 0700 root root
mkdir /data/radio 0770 radio radio

# create dalvik-cache and double-check the perms, so as to enforce our permissions
mkdir /data/dalvik-cache 0771 system system
chown system system /data/dalvik-cache
chmod 0771 /data/dalvik-cache

# create resource-cache and double-check the perms
mkdir /data/resource-cache 0771 system system
chown system system /data/resource-cache
chmod 0771 /data/resource-cache

# create the lost+found directories, so as to enforce our permissions
mkdir /data/lost+found 0770 root root

# create directory for DRM plug-ins - give drm the read/write access to
# the following directory.
mkdir /data/drm 0770 drm drm

# If there is no fs-post-data action in the init.<device>.rc file, you
# must uncomment this line, otherwise encrypted filesystems
# won't work.
# Set indication (checked by vold) that we have finished this action
#setprop vold.post_fs_data_done 1

# Include extra init file
import /init.cm.rc

on boot
# basic network init
ifup lo
hostname localhost
domainname localdomain

# set RLIMIT_NICE to allow priorities from 19 to -20
setrlimit 13 40 40

# Memory management. Basic kernel parameters, and allow the high
# level system server to be able to adjust the kernel OOM driver
# parameters to match how it is managing things.
write /proc/sys/vm/overcommit_memory 1
write /proc/sys/vm/min_free_order_shift 4
chown root system /sys/module/lowmemorykiller/parameters/adj
chmod 0664 /sys/module/lowmemorykiller/parameters/adj
chown root system /sys/module/lowmemorykiller/parameters/minfree
chmod 0664 /sys/module/lowmemorykiller/parameters/minfree

# Tweak background writeout
write /proc/sys/vm/dirty_expire_centisecs 200
write /proc/sys/vm/dirty_background_ratio 5

# Permissions for System Server and daemons.
chown radio system /sys/android_power/state
chown radio system /sys/android_power/request_state
chown radio system /sys/android_power/acquire_full_wake_lock
chown radio system /sys/android_power/acquire_partial_wake_lock
chown radio system /sys/android_power/release_wake_lock
chown system system /sys/power/state
chown system system /sys/power/wakeup_count
chown radio system /sys/power/wake_lock
chown radio system /sys/power/wake_unlock
chmod 0660 /sys/power/state
chmod 0660 /sys/power/wake_lock
chmod 0660 /sys/power/wake_unlock

chown system system /sys/devices/system/cpu/cpufreq/interactive/timer_rate
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/timer_rate
chown system system /sys/devices/system/cpu/cpufreq/interactive/min_sample_time
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/min_sample_time
chown system system /sys/devices/system/cpu/cpufreq/interactive/hispeed_freq
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/hispeed_freq
chown system system /sys/devices/system/cpu/cpufreq/interactive/go_hispeed_load
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/go_hispeed_load
chown system system /sys/devices/system/cpu/cpufreq/interactive/above_hispeed_delay
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/above_hispeed_delay
chown system system /sys/devices/system/cpu/cpufreq/interactive/boost
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/boost
chown system system /sys/devices/system/cpu/cpufreq/interactive/boostpulse
chown system system /sys/devices/system/cpu/cpufreq/interactive/input_boost
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/input_boost

# Assume SMP uses shared cpufreq policy for all CPUs
chown system system /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
chmod 0664 /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
chown system system /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
chmod 0664 /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
chown system system /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
chmod 0664 /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq

chown system system /sys/class/timed_output/vibrator/enable
chown system system /sys/class/leds/keyboard-backlight/brightness
chown system system /sys/class/leds/lcd-backlight/brightness
chown system system /sys/class/leds/button-backlight/brightness
chown system system /sys/class/leds/jogball-backlight/brightness
chown system system /sys/class/leds/red/brightness
chown system system /sys/class/leds/green/brightness
chown system system /sys/class/leds/blue/brightness
chown system system /sys/class/leds/red/device/grpfreq
chown system system /sys/class/leds/red/device/grppwm
chown system system /sys/class/leds/red/device/blink
chown system system /sys/class/leds/red/brightness
chown system system /sys/class/leds/green/brightness
chown system system /sys/class/leds/blue/brightness
chown system system /sys/class/leds/red/device/grpfreq
chown system system /sys/class/leds/red/device/grppwm
chown system system /sys/class/leds/red/device/blink
chown system system /sys/class/timed_output/vibrator/enable
chown system system /sys/module/sco/parameters/disable_esco
chown system system /sys/kernel/ipv4/tcp_wmem_min
chown system system /sys/kernel/ipv4/tcp_wmem_def
chown system system /sys/kernel/ipv4/tcp_wmem_max
chown system system /sys/kernel/ipv4/tcp_rmem_min
chown system system /sys/kernel/ipv4/tcp_rmem_def
chown system system /sys/kernel/ipv4/tcp_rmem_max
chown root radio /proc/cmdline

# Define TCP buffer sizes for various networks
# ReadMin, ReadInitial, ReadMax, WriteMin, WriteInitial, WriteMax,
setprop net.tcp.buffersize.default 4096,87380,704512,4096,16384,110208
setprop net.tcp.buffersize.wifi 524288,1048576,2097152,262144,524288,1048576
setprop net.tcp.buffersize.lte 4096,87380,1220608,4096,16384,563200
setprop net.tcp.buffersize.umts 4096,87380,563200,4096,16384,110208
setprop net.tcp.buffersize.hspa 4096,87380,704512,4096,16384,110208
setprop net.tcp.buffersize.hsupa 4096,87380,704512,4096,16384,262144
setprop net.tcp.buffersize.hsdpa 4096,87380,704512,4096,16384,262144
setprop net.tcp.buffersize.hspap 4096,87380,1220608,4096,16384,393216
setprop net.tcp.buffersize.edge 4096,26280,35040,4096,16384,35040
setprop net.tcp.buffersize.gprs 4096,8760,11680,4096,8760,11680
setprop net.tcp.buffersize.evdo 4096,87380,563200,4096,16384,262144
setprop net.tcp.buffersize.evdo_b 4096,87380,704512,4096,16384,262144

# Set this property so surfaceflinger is not started by system_init
setprop system_init.startsurfaceflinger 0

# Run sysinit
exec /system/bin/sysinit

class_start core
class_start main

on nonencrypted
class_start late_start

on charger
class_start charger

on property:vold.decrypt=trigger_reset_main
class_reset main

on property:vold.decrypt=trigger_load_persist_props
load_persist_props

on property:vold.decrypt=trigger_post_fs_data
trigger post-fs-data

on property:vold.decrypt=trigger_restart_min_framework
class_start main

on property:vold.decrypt=trigger_restart_framework
class_start main
class_start late_start

on property:vold.decrypt=trigger_shutdown_framework
class_reset late_start
class_reset main

## Daemon processes to be run by init.
##
service ueventd /sbin/ueventd
class core
critical

service console /system/bin/sh
class core
console
disabled
user shell
group log

on property:ro.debuggable=1
start console

# adbd is controlled via property triggers in init.<platform>.usb.rc
service adbd /sbin/adbd
class core
disabled

# adbd on at boot in emulator
on property:ro.kernel.qemu=1
start adbd

service servicemanager /system/bin/servicemanager
class core
user system
group system
critical
onrestart restart zygote
onrestart restart media
onrestart restart surfaceflinger
onrestart restart drm

service vold /system/bin/vold
class core
socket vold stream 0660 root mount
ioprio be 2

service netd /system/bin/netd
class main
socket netd stream 0660 root system
socket dnsproxyd stream 0660 root inet
socket mdns stream 0660 root system

service debuggerd /system/bin/debuggerd
class main

service ril-daemon /system/bin/rild
class main
socket rild stream 660 root radio
socket rild-debug stream 660 radio system
user root
group radio cache inet misc audio sdcard_r sdcard_rw qcom_oncrpc qcom_diag log

service surfaceflinger /system/bin/surfaceflinger
class main
user system
group graphics
onrestart restart zygote

service zygote /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server
class main
socket zygote stream 660 root system
onrestart write /sys/android_power/request_state wake
onrestart write /sys/power/state on
onrestart restart media
onrestart restart netd

service drm /system/bin/drmserver
class main
user drm
group drm system inet drmrpc sdcard_r

service media /system/bin/mediaserver
class main
user media
group audio camera inet net_bt net_bt_admin net_bw_acct drmrpc qcom_diag
ioprio rt 4

service bootanim /system/bin/bootanimation
class main
user graphics
group graphics
disabled
oneshot

service dbus /system/bin/dbus-daemon --system --nofork
class main
socket dbus stream 660 bluetooth bluetooth
user bluetooth
group bluetooth net_bt_admin

service bluetoothd /system/bin/bluetoothd -n
class main
socket bluetooth stream 660 bluetooth bluetooth
socket dbus_bluetooth stream 660 bluetooth bluetooth
# init.rc does not yet support applying capabilities, so run as root and
# let bluetoothd drop uid to bluetooth with the right linux capabilities
group bluetooth net_bt_admin misc
disabled

service installd /system/bin/installd
class main
socket installd stream 600 system system

service racoon /system/bin/racoon
class main
socket racoon stream 600 system system
# IKE uses UDP port 500. Racoon will setuid to vpn after binding the port.
group vpn net_admin inet
disabled
oneshot

service mtpd /system/bin/mtpd
class main
socket mtpd stream 600 system system
user vpn
group vpn net_admin inet net_raw
disabled
oneshot

service keystore /system/bin/keystore /data/misc/keystore
class main
user keystore
group keystore drmrpc
socket keystore stream 666

service dumpstate /system/bin/dumpstate -s
class main
socket dumpstate stream 0660 shell log
disabled
oneshot

service sshd /system/bin/start-ssh
class main
disabled

service mdnsd /system/bin/mdnsd
class main
user mdnsr
group inet net_raw
socket mdnsd stream 0660 mdnsr inet
disabled
oneshot

When I mount mmcblkp02 as /data "overwriting" existing one, there was much more free space in "storage" and in built-in application manager (bar at bottom of the screen), but most of apps crashes, or moment after that phone reboots.

mount -t ext2 -o rw,nosuid,nodev /dev/block/mmcblk0p2 /data

Also when I cd /data I was only seeing data from sd, and there wasn't data from internal memory. I try to copy internal data to sd cp /data/* /cache/jarek [jarek=mmcblk0p2 mount point]. but it still doesn't work after manual mount.

I read some posts and it's appear that I must change init.rc, which is overwrite on every shutdown, so to do that I need unpack recovery (boot.img), edit and repack, then upload. But than what? Probably there will problem with app's data that was in internal storage... ?

Questions:

1. is there any ready for use ROM with this feature?

2. is someone do something like this? is this work?

3. maybe it can't work and I shouldn't lose few more days on it, so tell me why? (technically only, I know I can just go buy new phone)

4. maybe I can extend existing /data with mmcblk0p2 instead swap this?

Jarek