yashsingh1/xdaforums huggingface dataset:
[Nexus 9 Original Android Development] muhsli:
I googled it for you:

"That is indeed what a .DS_Store file does, but that's not the ones Bogies is referring to.

There are various other items that start with a period, such as .Trashes. Every drive gets a trash folder, just as Windows does to each of its drives. While it hides its own trash folders from view, Windows doesn't recognize OS X's version of the trash folder, so you see it.

But you're likely talking about these. Every file you copy from OS X to a DOS/Windows formatted drive gets a ._ file. The Mac OS has a twin file system; the data fork, and the resource fork. Windows has only a data fork.

In order for OS X to maintain the resource fork data on a Windows drive, it has to write the resource data as a separate data fork file. So a file named foo.tif will also get a ._foo.tif file on the drive. Mac users don't see them since UNIX automatically hides anything that starts with a period. When you copy the file back to OS X, the data and resource fork info is combined again into a normal Mac file.

Most of the time, removing these are no big deal. They hold simple data like Type and Creator codes, modification dates, icons, etc. Others, like Mac Type 1 PostScript or Mac legacy TrueType fonts have all of the font data in the resource fork. Delete the ._ files for those types of fonts, and you're left with nothing."

Source
[Nexus 9 Original Android Development] myisf08:
Muhsli,

Thanks for the insight on the .DS_Store files. You are spot on! I have been moving files to/from my Mac and Nexus devices. I thought something was wrong with my tablet or TWRP. You just saved me from a lot of butt pain (unrooting/reconfiguring). Thanks again!

Cheers,

Rachael
[Nexus 9 Original Android Development] Pure Drive GT:
Dalvik Cache

I see that even with the N9 TWRP still has the Dalvik Cache wipe feature. I thought (correct me if I'm wrong) that since ART this does not exist anymore? So does wiping Dalvik Cache do simply nothing on a N9 or does it do something else? In case it is obsolete, would it be possible to hide/remove that option ?
[Nexus 9 Original Android Development] guyd:
I believe it wipes the ART equivalent of Dalvik on the N9
[Nexus 9 Original Android Development] iamelton:
i have the same problem when restoring a backup residing in my twrp folder in internal storage..

restoration failed with unable to mount vendor partition..

if vendor partition is unchecked then restoration completed without issue..

if vendor partition cannot be restored, is there any point to back it up then?

and whats the purpose of providing this option during backup?

im on latest twrp 2.8.6.0..
[Nexus 9 Original Android Development] jmdearras:
Android "M" TWRP?

Is there a TWRP available for the Nexus 9 WiFi with Android "M" preview? :D
[Nexus 9 Original Android Development] USBhost:
it still works with M

just dont be encrypted
[Nexus 9 Original Android Development] maxtcee:
anybody have a working link
[Nexus 9 Original Android Development] mrshades812:
Really?

The link in the OP works just fine.
[Nexus 9 Original Android Development] cam30era:
https://dl.twrp.me/flounder/
[Nexus 9 Original Android Development] Rydah:
New to the nexus line, how do I do that? I'm not rooted, that's what I'm trying to do.
[Nexus 9 Original Android Development] oRAirwolf:
You could use the Wugfresh Nexus Root Toolkit to flash back to stock and install a bootloader that doesn't have force encrypt enabled.
[Nexus 9 Original Android Development] Nasty64:
The latest I see on there is 2.8.6.0. Poked around quite a bit and haven't found .7.0 What am I missing? Same with the TWRP app.
[Nexus 9 Original Android Development] cam30era:
Good question. I don't know the answer. Maybe we caught the OP between update to XDA and the download links not yet updated???
[Nexus 9 Original Android Development] jd1639:
It's on it's way, http://www.xda-developers.com/xda-external-link/twrp-version-2-8-7-0-released/

Edit, I have 2.8.7.1 on my n5 and 2.8.7.0 on my i727. The n9 with it's 64 bit processor is probable taking more time to develop.
[Nexus 9 Original Android Development] jskup:
100% failure rate on the build server for us with the last attempt being three days ago - https://jenkins.twrp.me/

Unless they get around to us, we're not seeing a copy in the short term by the looks.
[Nexus 9 Original Android Development] WhammyDroid:
[MENTION=912474]Dees_Troy[/MENTION], any update on TWRP 2.8.7.0 / 2.8.7.1 for N9?
[Nexus 9 Original Android Development] Hashbang173:
I think they might need a kernel patch to fix those errors.
[Nexus 9 Original Android Development] cam30era:
2.8.7.0 is up on TWRP website for flounder.
[Nexus 9 Original Android Development] USBhost:
thanks man!
[Nexus 9 Original Android Development] cam30era:
Welcome. ;)
[Nexus 9 Original Android Development] adrok76:
Any ideas why I get this message on backup?

E: unable to locate '/and-sec' partition for backup calculations
[Nexus 9 Original Android Development] cam30era:
Are you on the latest, official version of TWRP? If not, I would give that a try.
[Nexus 9 Original Android Development] adrok76:
That would be 2.8.7.0? That's what I'm on currently
[Nexus 9 Original Android Development] cam30era:
Well, I'm grasping for straws here, but you might want to try flashing back to 2.8.6.0. While I've had no trouble with the latest, some users have reported problems restoring backups.
[Nexus 9 Original Android Development] VermontKindBud:
Default TWRP password

I just flashed Nexus 9 M preview MPA44G and am trying to root but TWRP asks for a password. I've tried default_password and also the same with quotation marks to no avail. What am I doing wrong? I set my screen lock to password and tried that password as well. No luck. Anyone know what's up?
[Nexus 9 Original Android Development] USBhost:
twrp does not support M yet

to root you will have to sideload or decrypt your storage
[Nexus 9 Original Android Development] VermontKindBud:
Thanks. Could you send me a link to a sideload tutorial?
[Nexus 9 Original Android Development] USBhost:
https://twrp.me/faq/ADBSideload.html

http://xdaforums.com/showthread.php?t=2588979
[Nexus 9 Original Android Development] xfullmetal17:
(sorry if this has been answered, but it's been a bit irksome)

Why is TWRP using the phone-style UI on a tablet? Or is there some option I missed to change it to tablet?
[Nexus 9 Original Android Development] Nikki1993:
Hey everyone!

Cannot boot into TWRP for some reason on my Nexus 9. Running stock ROM, USBhost Fire and Ice kernel. Stock recovery works without a hiccup, but TWRP is just stuck at the bootlogo. Any guesses?

It worked yesterday, perfectly fine. I haven't made any changes to the system since yesterday, so I am out of guesses why this is happening now.

Tried:

1. fastboot erase recovery and flash twrp on top = failed

2. fastboot erase recovery and flash stock recovery = success

3. flashing twrp on top of solution 2 = fail

deleted TWRP folder with all the settings, still fails.
[Nexus 9 Original Android Development] demkantor:
Best guess is a bad download of twrp, check md5sum

Otherwise post all input/output from cmd/terminal
[Nexus 9 Original Android Development] ericplatham:
I've got the same issue (stuck on Teamwin boot logo)... Same setup too. Stock Rom, Fire/Ice 9.7

It worked fine before I loaded up 9.7

Haven't had a chance to troubleshoot this though since I am at the office
[Nexus 9 Original Android Development] Nikki1993:
I haven't updated TWRP since 2.8.7.0, so it's not a bad download. It just stopped working out of the blue. Presumably, have something to do with the kernel, maybe? I'll poke USBhost.

---------- Post added at 07:56 PM ---------- Previous post was at 07:10 PM ----------

Went ahead and wiped everything:

System

Cache

Boot

Vendor

Recovery

reflashed bootloader and flashed twrp alongside, boot, cache and vendor, still loops at TWRP logo... what in the world has happened...

---------- Post added at 08:03 PM ---------- Previous post was at 07:56 PM ----------

Went ahead and flashed twrp 2.8.6 instead of 2.8.7 and after a while (nearly a minute) it booted into TWRP recovery... flashing twrp 2.8.7 and stuck at logo again... what happened? I swear everything worked just yesterday and I haven't done anything to my system other than flashing custom kernel update from Fire/Ice which has never caused any recovery shenanigans...

---------- Post added at 08:10 PM ---------- Previous post was at 08:03 PM ----------

I have no idea what happened but fastboot -w fixed it. Can now properly boot into twrp 2.8.7.0 which is again weird cause I haven't touched anything regarding TWRP or system files.
[Nexus 9 Original Android Development] jupppo:
I have the same issue. I am running CM 12.1. Sometimes I get the fallen Android and sometimes it boots into TWRP. But it takes ages then.
[Nexus 9 Original Android Development] brotbuexe:
Anyone tried 6.0? My boot encryption pin does not work in TWRP 2.8.7.0, so no /data mount.

Aside this it works for flashing kernel or supersu to /system...
[Nexus 9 Original Android Development] v12xke:
Same here... LTE version, I have no boot pin set (or swipe) and the default TWRP password is not working, so I can't use install to see or run any files I've put on the root. Probably will have to unencrypt and try again.
[Nexus 9 Original Android Development] brotbuexe:
you can still use adb sideload in TWRP (its in advanced, start it there when connected, and then "adb sideload update.zip" on the pc).

If it shows "waiting for device" check the device on the pc in device manager (if using windows), it's possible that you have to select the google usb driver again for this type of connection.

And I guess USB OTG should work too.
[Nexus 9 Original Android Development] brotbuexe:
using format data in twrp and reboot recovery works, but after booting in system and going back to recovery it is the same.
[Nexus 9 Original Android Development] Sviborg2241:
Think we should wait for the updated TWRP. Tried to flash it over fresh Marshmallow and got that damn password encryption on start. Formatted data and ended up in bootloop - further attempts to re-flash everything led to the warning screen about corrupted device and I started getting bootloops after almost every reboot. Flashing M image even without TWRP did nothing, had to re-flash latest Lollipop first and then download an OTA to get Marshmallow working. Ugh the only thing I need is to upload the adaway-modified hosts file, and it seems like the only way to get /system mounted on full stock is to get a custom recovery.
[Nexus 9 Original Android Development] v12xke:
Well, I am up and running on the N9 LTE. Wug Fresh came out with a modified boot.img making unencrypting very easy using the flash-stock and no-force encrypt. As soon as it booted I installed TWRP and flashed Elemental X 4.0 and then SU 2.49 Beta. Once rooted I used Titanium Backup to restore all my apps. Even used the backup of the Google App to restore all my shortcuts so all my icons are where they used to be in 5.1.1. Only problem is upon booting I get the weird boot msg below "Your Device Is Corrupt...." others have been getting. TWRP is working normally and allowed me to make a full backup. Other than a 10 sec. delay in boot, the tablet is working perfectly.

https://support.google.com/nexus/answer/6185381?hl=en
[Nexus 9 Original Android Development] brotbuexe:
I made a comment on the github issue page: https://github.com/TeamWin/Team-Win-Recovery-Project/issues/500

If anyone finds interesting stuff about the encrpytion issue, maybe report it there too.
[Nexus 9 Original Android Development] v12xke:
Running 6.0 unencrypted on N9 until sorted. No TWRP issues including flashing, backup/restore, etc. Focusing on the more popular Nexus forums (6,5) for an emerging fix, but nothing yet.

wut?
[Nexus 9 Original Android Development] Ltdrev:
Issue here too with being unable to mount anything but eh if sideload works! :o

wtfn

*edit*

No encryption in my case just "blank" at twrp boot prompt and then adb sideload & ignore errors...

Yeah sideloaded elementalx 4.01 and supersu beta 2.52, works.
[Nexus 9 Original Android Development] Manu270891:
I can't use ADB Sideload. It gets stuck at "Starting ADB sideload feature..." and I can't install TWRP and SuperSU on Android 6 because of the encryption bug. How can I get the ADB Sideload feature working? Thanks!
[Nexus 9 Original Android Development] Ltdrev:
I got into fastboot flashed recovery (twrp in my case) then booted into it> advanced> adb sideload, the errors and "starting adb sideload" .

We're there! Yes yes!

From your desktop terminal window then;

adb sideload "path to file" ,

Command should work!

Assuming you have adb and working properly.
[Nexus 9 Original Android Development] fhem:
Probably need to update your adb version Need v1.0.32
[Nexus 9 Original Android Development] adrok76:
\hi, could someone advise me what I should do, I have fresh M images installed and have flashed twrp, should I hit cancel when it asks for a password? last time I entered default_password and data corrupted, had to reflash stock
[Nexus 9 Original Android Development] WhammyDroid:
I am seeing the same thing. I have even tried a factory reset and re-encrypting the data partition.

TWRP still will not decrypt the partition.

Edit: BTW, who's the developer supporting the device? [MENTION=912474]Dees_Troy[/MENTION], is this you?
[Nexus 9 Original Android Development] Captain_Throwback:
Then [MENTION=5501864]USBhost[/MENTION] should submit the changes to gerrit so we can all benefit ;).

---------- Post added at 09:39 AM ---------- Previous post was at 09:38 AM ----------

It is [MENTION=912474]Dees_Troy[/MENTION], who I know has been diligently working on trying to figure this out. In the meantime, patience is in order. That, or don't encrypt the device.
[Nexus 9 Original Android Development] v12xke:
While waiting for the M compatible version of TWRP to come out, I noticed TWRP backups using compression have tripled or quadrupled in time on the N9 since running M vs. L. I'm unencrypted and a backup with compression takes 35-40 minutes. (2.9 GB), while uncompressed takes about 10 minutes (5.76 GB). Looking in the recovery log file the only thing I found unusual was the line TW_INCLUDE_Crypto :=true (which I am not). By contrast the N6 takes about 7 minutes to backup a similar size image compressed. Average backup rate for files systems is 2 MB/sec for the N9 vs. 12 MB/sec on the N6. I don't know why this is but I thought it was important to note, and I haven't read of anyone else testing backup times. Next time you run a compressed backup report back and let's compare times.
[Nexus 9 Original Android Development] USBhost:
3.50m compression 12MB/s

1.44m uncompressed 31MB/s
[Nexus 9 Original Android Development] v12xke:
Hi and thanks for the reply, and ....well you certainly are smoking me in file system write speed. I do see you are backing up only one partition (data?) while I back up boot, data and system, but that doesn't explain the change in file write speed (for me) between L&M. I'm fairly certain it is not a formatting or partition error on my end. May I ask if you are running a modified version of TWRP for the N9, and if so, would you mind sharing your modded version? Cheers.
[Nexus 9 Original Android Development] USBhost:
http://xdaforums.com/showpost.php?p=56537095&postcount=4
[Nexus 9 Original Android Development] v12xke:
Wow. Went from 2 MB/sec to 11 MB/sec, finishing 6,138MB backup (3,048 MB compressed) in 9 minutes. Nice interface as well. Very impressed. Thank you sir!
[Nexus 9 Original Android Development] Captain_Throwback:
Can you submit your changes to Gerrit, please?
[Nexus 9 Original Android Development] USBhost:
and where do I find it.

https://gerrit.omnirom.org ?
[Nexus 9 Original Android Development] Captain_Throwback:
http://gerrit.twrp.me

P.S. It's in the OP ;)
[Nexus 9 Original Android Development] USBhost:
o right I guess I never fully read OP lol
[Nexus 9 Original Android Development] Captain_Throwback:
Gerrit is actually http://gerrit.twrp.me (no "s") - the secure site takes you to Jenkins instead of gerrit for some reason :confused:
[Nexus 9 Original Android Development] Dees_Troy:
Updated to fix / support decrypt on 6.0 Marshmallow. Sorry for the delay. Took me a bit to figure out what was missing.
[Nexus 9 Original Android Development] corkiejp:
Thank you,

Just flashed on my device and can confirm TWRP now works on an encrypted device!
[Nexus 9 Original Android Development] brotbuexe:
Thanks for the updated version.

On the second post the link goes to "volantis", not to "flounder". And it goes to some old version of the downloadserver.
[Nexus 9 Original Android Development] corkiejp:
It can be got from here!

"volantis" and "flounder" or both names for the Nexus 9
[Nexus 9 Original Android Development] Taomyn:
Works for me also, great job [emoji106]
[Nexus 9 Original Android Development] fhem:
Working for me also :good::good::good:
[Nexus 9 Original Android Development] WhammyDroid:
[MENTION=912474]Dees_Troy[/MENTION], TWRP Recovery is looking at the wrong folder for themes.

Currently it is looking at /data/media/TWRP/theme.

What it should be looking at: /data/media/0/TWRP/theme

On the Nexus 6, it is: /data/media/0/TWRP/theme

Why is the Nexus 9 different?
[Nexus 9 Original Android Development] rhai:
Hi Bro,

Why does this have MicroSD on advaced wipe. :)
[Nexus 9 Original Android Development] bteljuice:
Something is wrong with my N9 tablet and need help please. All of a sudden, i can no longer access TWRP 2.8.7.1 on my 5.1.1 rooted N9.

I've used fastboot flash recovery twrp.img to flash TWRP again as I was worried it is correct and i have yet to succeed to access TWRP.

I', also trying to factory reset and my tablet isn't resetting. No matter how many times i click on the icon.

Any advice?
[Nexus 9 Original Android Development] USBhost:
try mine

http://xdaforums.com/showpost.php?p=56537095&postcount=4
[Nexus 9 Original Android Development] bteljuice:
YESSSSSSSSSSSSSSSSSSSSS!!!!!!!!!!!!!!!!!!!

Thanks loads. Yes I was using Fire ICE. How did I not read post 4. Sorry for the noob move....
[Nexus 9 Original Android Development] Captain_Throwback:
Where are those gerrit patches?

It'd be nice if everyone could benefit from your optimizations :).
[Nexus 9 Original Android Development] USBhost:
Yeah yeah I just been busy or lazy or both lol
[Nexus 9 Original Android Development] dermann:
I've been searching for the past hour and ½ (mobile), still not finding my answer. So I give up...

When making a backup on the nexus 9, do I need to tick the vendor box as well? When I backup just the boot, system and data and try to restore, I don't even get the boot animation. It just hangs. Please, ends this for me.
[Nexus 9 Original Android Development] enriquejones666:
You only need to backup vendor if you are going between different versions of Android, or if you are using Layers or Viper4Android and have manually altered the vendor partition.
[Nexus 9 Original Android Development] dermann:
Thank you!

But unfortunately I haven't switched versions, any idea why my backup hangs then, with just those 3 backup?
[Nexus 9 Original Android Development] Lw00d:
with the latest 2.8.7.1 ,

reboot system hangs. will not reboot my system. just lock up twrp.. if i hold the power buttom , that works.. is this a known issue.. i try reflashing twrp.. still same issue..
[Nexus 9 Original Android Development] SirMatin:
hi every one

happy new year :D

can any one upload the latest .img file??

there is a dead nexus 9 lte here and i can't boot it up too install recovery from the app ... actually it's not even rooted =))

but nevermind .... someone just pls upload the img file 4 me, i know how to take care of the rest :D

tnx in advance
[Nexus 9 Original Android Development] demkantor:
https://dl.twrp.me/flounder/
[Nexus 9 Original Android Development] dmantilal:
Did you verify the checksum?
[Nexus 9 Original Android Development] Gold Ribbed:
New to Nexus but not Twrp. I have use Twrp for some time on my ONO to back up I use Boot, System and Data. I have not flashed Twrp yet just wondered what the eqwuivalant was on the nexus? Or what I need to back up to restore from a different ROM.
[Nexus 9 Original Android Development] madbat99:
Same stuff. System, data, boot.
[Nexus 9 Original Android Development] Gold Ribbed:
OK I took the plunnge and unlocked my Nexus. Went into fast boot and flashed recvery twrp recovery .img. Reboot recovery and ended up with stock recovery. Tried again but no joy.

This was on stock from no root. I did read that some ROMs load stock recovery on first boot. Any suggestions where I went wrong?
[Nexus 9 Original Android Development] dictionary:
What exact commands did you use?

fastboot flash recovery twrprecovery.img

Or whatever you named it
[Nexus 9 Original Android Development] madbat99:
Boot directly to recovery after flash. Do not boot system first
[Nexus 9 Original Android Development] Gold Ribbed:
Thanks for the replies. This was the process I used:-

Unlocked boot loader.

booted tablet and and had working stock ROM

Ticked OEM unlocking and USB debugging.

Powered down.

Went into fast boot on tablet.

Opened a command prompt.(on Mac)

CD to folder were ADB, Fastboot and recovery image are saved.

Typed command fastboot flash recovery recovery.img ( I had renamed image to recovery)

Process completed.

I then booted tablet (this may be were I went wrong)

Used command ADB reboot recovery

No tarp.

How do I boot straight into recovery before I boot the system? Do I select recovery on the fast boot screen on the tablet and press the power button.

TA

---------- Post added at 10:55 AM ---------- Previous post was at 10:55 AM ----------

Yes.
[Nexus 9 Original Android Development] madbat99:
Yes, select boot recovery in fastboot screen.
[Nexus 9 Original Android Development] dictionary:
Go through the process again. Once it shows completed, hit the volume down key on the tablet until you get to recovery, then press power. If recovery isn't down, go down to bootloader, then press power. Then go down to recovery and press power.

Alternately, I think you can fastboot reboot recovery. Or fastboot reboot-recovery
[Nexus 9 Original Android Development] Gold Ribbed:
Thanks for the advice and I have now got TWRP installed. Just backing up then hope to try a few different ROMs. Resurrection Remix first as I have this on my phone and it is very good.
[Nexus 9 Original Android Development] Gold Ribbed:
How come TWRP will backup Vedor but fails to restore? Version 2.8.7.1
[Nexus 9 Original Android Development] madbat99:
Restoring an old vendor causes bootloop anyways. No need to ever do it. Once you update it, you never want to go backwards.

I think it has the option because it works on some devices.
[Nexus 9 Original Android Development] NYCHitman1:
I have zero issues restoring vendor AND never once have I had a bootloop because of it.. sooo yeaaaaaah :laugh:
[Nexus 9 Original Android Development] Ferenczy68:
Dirty Unicorns strikes again!
[Nexus 9 Original Android Development] madbat99:
It's temp bootlooped my n9 every time. Restored it on accident once, on purpose twice. So, different experience. Laugh all you want, facts are facts.

Has anyone else successfully restored vendor on n9? (Curiosity)

Maybe on a different device it works?

I haven't tried since lollipop though.
[Nexus 9 Original Android Development] NYCHitman1:
To be fair, just because something is happening to you -- doesn't make it a fact. You're probably having bootloops because whatever vendor you have backed up is older than what is required to run whatever ROM you're on. THAT is what can cause bootloops, but that has nothing to do with TWRP.

Don't spread misinformation because you aren't doing anyone favors here by doing so.