[Bug 1568889] Re: OTA and u-d-f fail if image is too big for the system partition

[Alan Bell]

I have 27MB of stuff in /var/log
there is a dpkg.log.1 showing stuff installed on 2016-02-17 showing stuff being unpacked and configured, I think that is first boot stuff from when I wiped it, no packages installed after that.
looking at where the space is used

phablet at ubuntu-phablet:/$ sudo du -sh *
315M	android
6.7M	bin
4.0K	boot
0	cache
295M	custom
0	data
4.0K	dev
8.6M	etc
0	factory
0	firmware
501M	home
33M	lib
16K	lost+found
788M	media
4.0K	mnt
191M	opt
0	persist
du: cannot access ‘proc/21112/task/21112/fd/4’: No such file or directory
du: cannot access ‘proc/21112/task/21112/fdinfo/4’: No such file or directory
du: cannot access ‘proc/21112/fd/4’: No such file or directory
du: cannot access ‘proc/21112/fdinfo/4’: No such file or directory
0	proc
12K	root
488K	run
7.2M	sbin
4.0K	srv
0	sys
0	system
28K	tmp
72M	userdata
1.2G	usr
461M	var
0	vendor


/usr /var and /custom seem to account for the space used

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Title:
  OTA and u-d-f fail if image is too big for the system partition

Status in Canonical System Image:
  Confirmed
Status in android package in Ubuntu:
  New
Status in system-image package in Ubuntu:
  Confirmed
Status in ubuntu-download-manager package in Ubuntu:
  Invalid
Status in ubuntu-system-settings package in Ubuntu:
  New

Bug description:
  On Meizu MX4 upgrade from OTA-9.1 to OTA-10 fails.
  Upgrade downloads normally, phone restarts and starts system upgrade and after a while it freezes with strange icon (small microchip with red sign on it)

  When you turn off the phone and start it again it still presents itself as OTA-9.1 and again it founds and offer upgrade.
  Anyway some changes from OTA-10 seems to be applied, because I can see design changes, copy function in web browser etc.

  It's reproducible on my phone any time I try to upgrade. If I can help
  with output of some log, or anything else, please let me know.

  Well described here by Lars Kristian Wichmann Hansen:
  http://askubuntu.com/questions/754963/upgrade-meizu-mx4-ubuntu-edition-to-ota-10-fails

  * u-d-f case described in bug 1582325

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