[Ubuntu Touch General] mrplowdan:
No problem, Ubuntu must have meant app data, because /data/media is untouched after the install

mrplow@mrplow-desktop:~$ adb shell ls /sdcard/
Alarms
Android
Cyandelta
DCIM
Download
Movies
Music
NFC ReTAG
Notifications
PicSay
Pictures
Podcasts
ROMs
Ringtones
SmartVoiceRecorder
TWRP
Tasker
TitaniumBackup
catlog
clockworkmod
cmupdater
com.fongo.dellvoice
com.google.android.apps.listen
data
goomanager
iwcache
panoramas
mrplow@mrplow-desktop:~$ adb shell cat /system/build.prop|head
# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=JDQ39
ro.build.display.id=cm_maguro-userdebug 4.2.2 JDQ39 eng..20130219.014313 test-keys
ro.build.version.incremental=eng..20130219.014313
ro.build.version.sdk=17
ro.build.version.codename=REL
ro.build.version.release=4.2.2
ro.build.date=Tue Feb 19 01:43:50 PST 2013
ro.build.date.utc=1361267030
mrplow@mrplow-desktop:~$ phablet-flash -b
"Touch Developer Preview for Ubuntu" is released for free
non-commercial use. It is provided without warranty, even the implied
warranty of merchantability, satisfaction or fitness for a particular
use. See the licence included with each program for details.

Some licences may grant additional rights; this notice shall not limit
your rights under each program's licence. Licences for each program
are available in the usr/share/doc directory. Source code for Ubuntu
can be downloaded from archive.ubuntu.com. Ubuntu, the Ubuntu logo
and Canonical are registered trademarks of Canonical Ltd. All other
trademarks are the property of their respective owners.

"Touch Preview for Ubuntu" is released for limited use due to the
inclusion of binary hardware support files. The original components
and licenses can be found at:
https://developers.google.com/android/nexus/drivers.

Do you accept? [yes|no]
yes
Starting new HTTP connection (1): cdimage.ubuntu.com
Download directory set to /home/mrplow/Downloads/phablet-flash/95
Device detected as maguro
Downloading http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-system-armel+maguro.img
--2013-02-21 15:09:50-- http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-system-armel+maguro.img
Resolving cdimage.ubuntu.com (cdimage.ubuntu.com)... 91.189.92.174
Connecting to cdimage.ubuntu.com (cdimage.ubuntu.com)|91.189.92.174|:80... connected.
HTTP request sent, awaiting response... 416 Requested Range Not Satisfiable

The file is already fully retrieved; nothing to do.

Downloading http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-system-armel+maguro.img.md5sum
--2013-02-21 15:09:50-- http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-system-armel+maguro.img.md5sum
Resolving cdimage.ubuntu.com (cdimage.ubuntu.com)... 91.189.92.174
Connecting to cdimage.ubuntu.com (cdimage.ubuntu.com)|91.189.92.174|:80... connected.
HTTP request sent, awaiting response... 416 Requested Range Not Satisfiable

The file is already fully retrieved; nothing to do.

quantal-preinstalled-system-armel+maguro.img: OK
Downloading http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-phablet-armhf.zip
--2013-02-21 15:09:52-- http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-phablet-armhf.zip
Resolving cdimage.ubuntu.com (cdimage.ubuntu.com)... 91.189.92.174
Connecting to cdimage.ubuntu.com (cdimage.ubuntu.com)|91.189.92.174|:80... connected.
HTTP request sent, awaiting response... 416 Requested Range Not Satisfiable

The file is already fully retrieved; nothing to do.

Downloading http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-phablet-armhf.zip.md5sum
--2013-02-21 15:09:52-- http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-phablet-armhf.zip.md5sum
Resolving cdimage.ubuntu.com (cdimage.ubuntu.com)... 91.189.92.174
Connecting to cdimage.ubuntu.com (cdimage.ubuntu.com)|91.189.92.174|:80... connected.
HTTP request sent, awaiting response... 416 Requested Range Not Satisfiable

The file is already fully retrieved; nothing to do.

quantal-preinstalled-phablet-armhf.zip: OK
Downloading http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-recovery-armel+maguro.img
--2013-02-21 15:09:59-- http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-recovery-armel+maguro.img
Resolving cdimage.ubuntu.com (cdimage.ubuntu.com)... 91.189.92.174
Connecting to cdimage.ubuntu.com (cdimage.ubuntu.com)|91.189.92.174|:80... connected.
HTTP request sent, awaiting response... 416 Requested Range Not Satisfiable

The file is already fully retrieved; nothing to do.

Downloading http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-recovery-armel+maguro.img.md5sum
--2013-02-21 15:09:59-- http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-recovery-armel+maguro.img.md5sum
Resolving cdimage.ubuntu.com (cdimage.ubuntu.com)... 91.189.92.174
Connecting to cdimage.ubuntu.com (cdimage.ubuntu.com)|91.189.92.174|:80... connected.
HTTP request sent, awaiting response... 416 Requested Range Not Satisfiable

The file is already fully retrieved; nothing to do.

quantal-preinstalled-recovery-armel+maguro.img: OK
Downloading http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-boot-armel+maguro.img
--2013-02-21 15:10:00-- http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-boot-armel+maguro.img
Resolving cdimage.ubuntu.com (cdimage.ubuntu.com)... 91.189.92.174
Connecting to cdimage.ubuntu.com (cdimage.ubuntu.com)|91.189.92.174|:80... connected.
HTTP request sent, awaiting response... 416 Requested Range Not Satisfiable

The file is already fully retrieved; nothing to do.

Downloading http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-boot-armel+maguro.img.md5sum
--2013-02-21 15:10:00-- http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo/quantal-preinstalled-boot-armel+maguro.img.md5sum
Resolving cdimage.ubuntu.com (cdimage.ubuntu.com)... 91.189.92.174
Connecting to cdimage.ubuntu.com (cdimage.ubuntu.com)|91.189.92.174|:80... connected.
HTTP request sent, awaiting response... 416 Requested Range Not Satisfiable

The file is already fully retrieved; nothing to do.

quantal-preinstalled-boot-armel+maguro.img: OK
Pushing /home/mrplow/Downloads/phablet-flash/95/quantal-preinstalled-phablet-armhf.zip to /sdcard/autodeploy.zip
3520 KB/s (504219641 bytes in 139.857s)
The device needs to be unlocked for the following to work
[sudo] password for mrplow:
erasing 'system'...
OKAY [ 0.022s]
sending 'system' (83042 KB)...
OKAY [ 9.120s]
writing 'system'...
OKAY [ 12.811s]
finished. total time: 21.953s
sending 'boot' (4450 KB)...
OKAY [ 0.489s]
writing 'boot'...
OKAY [ 1.065s]
finished. total time: 1.555s
sending 'recovery' (6066 KB)...
OKAY [ 0.677s]
writing 'recovery'...
OKAY [ 0.871s]
finished. total time: 1.549s
Booting into recovery
downloading 'boot.img'...
OKAY [ 0.679s]
booting...
OKAY [ 0.358s]
finished. total time: 1.037s
Once completed the device should reboot into Ubuntu

5 min later...

mrplow@mrplow-desktop:~$ adb shell ls /data/media/0
Alarms SmartVoiceRecorder
Android TWRP
Cyandelta Tasker
DCIM TitaniumBackup
Download autodeploy.zip
Movies catlog
Music clockworkmod
NFC ReTAG cmupdater
Notifications com.fongo.dellvoice
PicSay com.google.android.apps.listen
Pictures data
Podcasts goomanager
ROMs iwcache
Ringtones panoramas
mrplow@mrplow-desktop:~$ adb shell cat /default.prop|head
#
# ADDITIONAL_DEFAULT_PROPERTIES
#
ro.secure=1
ro.allow.mock.location=0
ro.debuggable=1
persist.sys.usb.config=mtp,adb
# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=JOP40D
mrplow@mrplow-desktop:~$ adb reboot bootloader
mrplow@mrplow-desktop:~$