topic Re: Android 5.1.1: Broken encryption of exFAT SD cards in Z Series

Android 5.1.1: Broken encryption of exFAT SD cards

avolkov — Tue, 03 Nov 2015 23:27:44 GMT

Hello,

After upgrading of my phone to the 5.1.1 I've tried to (re)encrypt my phone and card, but without any success: card become unreadable and all data on it disappeared. Card's reformatting doesn't helpful since card became unencrypted and any following reencryption lead to the same result: unreadable card. If someone have solution for this regression (except downgrade) please tell me.

Thank you
Andrey

Upd: As I've answered below, internal phone's memory has been encrypted successfully, problem only with SD. Also before wrote this post I've tried to do next things:
- factory reset couple times
- reinstall firmware by Companion
- install AOSP
And probably Cyanogen has not problems with encryption, but I need for the worked camera.

Re: Android 5.1.1: Broken encryption of exFAT SD cards

Uliwooly — Tue, 03 Nov 2015 23:51:48 GMT

@avolkov

use the search bar, you might find similar posts

/t5/Xperia-Z3-Compact/What-s-about-Lollipop-encryption/td-p/1031934

/t5/Xperia-Z3-Compact/More-5-1-1-Problems-Sony-Google-come-on-sort-this-out/td-p/1019344

Re: Android 5.1.1: Broken encryption of exFAT SD cards

avolkov — Wed, 04 Nov 2015 00:28:19 GMT

Maybe I did not describe the problem clearly: the phone is properly encrypted, but the card doesn't. Nothing common with Z3 case.

Re: Android 5.1.1: Broken encryption of exFAT SD cards

Uliwooly — Wed, 04 Nov 2015 00:33:57 GMT

@avolkov

The phone its encrypted but not the SD card, is that what you are saying?

Re: Android 5.1.1: Broken encryption of exFAT SD cards

avolkov — Wed, 04 Nov 2015 00:38:12 GMT

@uliwooly wrote:
@avolkov
The phone its encrypted but not the SD card, is that what you are saying?

Yes, exactly.

Re: Android 5.1.1: Broken encryption of exFAT SD cards

avolkov — Wed, 04 Nov 2015 00:41:56 GMT

And, as far as I can see (due to empty search results), this problem appeared only with exFAT cards.

Re: Android 5.1.1: Broken encryption of exFAT SD cards

Uliwooly — Wed, 04 Nov 2015 00:42:52 GMT

@avolkov

If I recalled it was an Android issue but I'll keep looking

Re: Android 5.1.1: Broken encryption of exFAT SD cards

avolkov — Wed, 04 Nov 2015 00:53:43 GMT

I'm afraid that it's Sony creation. Half of year is more then enough to bump and publish such problem.

Re: Android 5.1.1: Broken encryption of exFAT SD cards

Uliwooly — Wed, 04 Nov 2015 00:56:47 GMT

@avolkov

I'll escalate this, perhaps we'll get an official answer.

Re: Android 5.1.1: Broken encryption of exFAT SD cards

avolkov — Wed, 04 Nov 2015 01:06:45 GMT

Thank you

Re: Android 5.1.1: Broken encryption of exFAT SD cards

Rickard — Fri, 06 Nov 2015 08:03:31 GMT

I'm sorry to hear that.

What SD card do you have (brand/size)?

You mentioned this only happens when card is formatted with exFAT. Does this mean that you've tested the same card formatted with FAT32 and then it works?

Were you able to encrypt the card (while formatted with exFAT) on AOSP?

Re: Android 5.1.1: Broken encryption of exFAT SD cards

avolkov — Sun, 08 Nov 2015 18:29:39 GMT

Hi Rickard,

Yes I've checked with other card, and may confirm that:
- "standard" (up to 32 Gb) SDxx card is encrypted without issues. I've checked it with SanDisk 4GB SDHC card

- SanDisk Ultra 64 GB SDXC is encrypted, but Sony's driver in the 5.1.1 could not read it after. This card work fine with previous

Android 5.0. So, I'm afraid you may congratulate the QA.

I installed AOSP just to be sure that file system is really clean, since I've a problems with audio firmware update in time of previous upgrade.

Btw I've created error ticket #1-22299737556, but received usual "check the power cord/RTFM" reply

Re: Android 5.1.1: Broken encryption of exFAT SD cards

Rickard — Mon, 09 Nov 2015 11:43:01 GMT

Would it be possible for you to test this card using a PC, a card reader and a test software like h2testw with write+verify test to make sure the 64GB card you have is still fully working?

Re: Android 5.1.1: Broken encryption of exFAT SD cards

Rickard — Thu, 12 Nov 2015 13:37:18 GMT

We have now tested this with a Sandisk Ultra 64GB SDXC formatted with exFAT but we can't replicate this on the latest firmware so please test your card with the software i mentioned. Damaged blocks on the SD card could cause something like this.

Re: Android 5.1.1: Broken encryption of exFAT SD cards

Uliwooly — Tue, 08 Dec 2015 18:39:06 GMT

@avolkov

Were you able to solve your issue?