Cyanogenmod: Encryption unsuccessful

Question

I encrypted my phone. That worked fine. Then I installed another version of Cyanogenmod. This cannot decrypt the data (which is OK: There is no important data on the phone). It tells me to perform a factory reset, but even after the factory reset the phone is stuck at the "Encryption unsuccessful".

The error I get is the same as on: Samsung Galaxy encryption failed

How do I convince Cyanogenmod that all encrypted data is deleted?

I have tried:

Factory reset
Installing the version of Cyanogenmod that encrypted the phone

score 1 · Accepted Answer · edited Mar 13 '14 at 15:48

1

The factory reset failed to format /data (and thus most likely left the old encryption in place).

Having formatted /data manually, the factory reset finally could complete successfully, and the new version of Cyanogenmod showed up.

edited Mar 13 '14 at 15:48

Izzy

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answered Mar 12 '14 at 09:30

Ole Tange

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@Downvoters: This perfectly makes sense to me, so I re-phrased it to make it easier to grasp: it could well be that CM did not know the "old" encryption key, and thus was unable to access the (existing) file system. Formatting the partition created a "virgin" file system without encryption, and thus made it accessible again (to my understanding). – Izzy Mar 13 '14 at 15:54

score 0 · Answer 2 · answered Aug 15 '16 at 09:35

0

You have to enter recovery mode, (mine is TWRP 2.8.1), than from recovery change data system type to etx4.

answered Aug 15 '16 at 09:35

Sargis Sargsyan

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score -1 · Answer 3 · edited Dec 08 '15 at 04:21

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Format sdcard0 (internal storage) to ext3 file-system format and it is going to be OK!

edited Dec 08 '15 at 04:21

Manu

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answered Dec 07 '15 at 19:47

Sergey

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Cyanogenmod: Encryption unsuccessful

3 Answers3

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