Document how to fix a Tails device that got broken for too many automatic updates

Several users complain about not being able to boot after incremental update from Tails 1.5.1 to Tails 1.6

Tails gets stuck at boot in the message:

“Loading Please Wait …”

And another user reported seeing when in Failsafe:

“/scripts/init-premount”

as last message.

After speaking with anonym there is a suspicion:

If you have installed Tails 1.2.2 and incrementally upgraded since then, the IUKs until now total at 1577 MB, which may be too much

The Upgrader should notice when there’s too little space, and give an appropriate error => abort, but it seems it installs a corrupted IUK, then it’s no surprise if it fails at /scripts/init-premount

Feature Branch: emmapeel:tails/bugfix/10235

Related issues

• Related to #9972 (closed)
• Related to #10239 (closed)

Original created by @emmapeel on 10235 (Redmine)