[all] Unreliable Backup/restore from device to device

REPRODUCIBILITY (% or how often): ?
BUILD ID = OS VERSION (Settings > About product): all
HARDWARE (XA2, X10, X10 II, …): all
UI LANGUAGE: -
REGRESSION: (compared to previous public release: Yes, No, ?): -

DESCRIPTION:

The internal backup / restore funtionality is unreliable.

PRECONDITIONS:

take a backup
try to restore on other device, same device with other firmware, …

STEPS TO REPRODUCE:

  1. take backup (e.g. 3.2.1)
  2. flash device with 4.x.x)
  3. restore backup
  1. take backup old device old firmware
  2. have new device new firmware
  3. restore backup

EXPECTED RESULT:

backup is restored with all information

ACTUAL RESULT:

sometimes it works
often backup stops, some info may be restored or not

ADDITIONAL INFORMATION:

(Please ALWAYS attach relevant data
such as logs, screenshots, etc…)

nemo / defaultuser
bash
tar

wikified, anyone may edit

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