yashsingh1/xdaforums huggingface dataset:
[Android Q&A, Help & Troubleshooting] thanks_my_pal:
here is some thing to ask......................

here is some thing to ask......................i have got the ota update but when i try to install after downloading it reboot in recovery and doesnt get install ............i have rooted my phone by bootloader...................it is not getting installed manually too............... ...i m onstock recovery .............if i can install it with any other procedure or if i m just doing mistake pls just tell me.............................thanks in advance to all of u............

---------- Post added at 10:09 AM ---------- Previous post was at 10:06 AM ----------

same problem
[Android Q&A, Help & Troubleshooting] veenit:
soft brick yuphoria

i have soft brickd my yuphoria please help!!!!:crying:
[Android Q&A, Help & Troubleshooting] V3T_N:
Hmmm k
[Android Q&A, Help & Troubleshooting] aakashmaji16:
After the update of YUphoria COS 12.1,

Using any of the apps for a longer time, suddenly it restarts the app.

This happens very frequently

Please do reply and help me

Thanks in advance.
[Galaxy Tab S General] ashyx:
T800 kernel added. Not tested as I don't have the T800, so can someone confirm it works?
[Galaxy Tab S General] godsfilth:
thanks loved f2fs on my N7 i'm making a backup now not sure if I'll be able to test before work or if I'll have to wait till tomorrow
[Galaxy Tab S General] godsfilth:
so it seems the T800 doesn't boot.

after a minute or two logcat starts running but seems to my untrained eye to loop to the same things every few minutes.

i can still force a reboot into recovery so no harm done, if you have any ideas ill test them out, ill try again sometime tomorrow maybe my sleep deprived brain missed something
[Galaxy Tab S General] ashyx:
How far does it boot and how long did you wait, do you see the second multicoloured Samsung logo?

It does boot on my t805 fine as do all t800 kernels, so seems strange it doesn't on your t800.

I will post another boot.img for you to try.

Can you try booting again then send me the kernel log.

cat /proc/last_kmsg > /sdcard/last_kmsg.txt
[Galaxy Tab S General] godsfilth:
boots to the "samsung galaxy tab s" splash screen then dims a little and stays there left it for 10 minutes while i figured out where adb pull and windows 10 had decided the kmsg file should go as well as while i typed this.

i did see an error in recovery when formatting data as f2fs it said something along the line of "mount -o bind /data/media/sdcar0 error=255" pretty sure it was longer than that ill get the whole message if you want.

kmsg should be attached let me know if you need anything else
[Galaxy Tab S General] ashyx:
That error message is normal because you've formatted the data partition, it's just a warning it can't mount sdcard/0.

Did you make sure that you formatted both cache and data to f2fs?

Also the kernel log you posted is from recovery not boot. To get the boot kernel log, boot as normal, give it a minute then immediately restart to recovery. Then run the command in the twrp terminal or adb.
[Galaxy Tab S General] godsfilth:
ok so now that the kernel is working and i've played with it for a little while its definitely snappier at startup compared to ext4, noticeably so also apps seem to be a quicker as well ill play around with it some more and see but definitly plan on keeping it f2fs and swapping my girlfriends over as well
[Galaxy Tab S General] TheGoD:
Any idea if apps like FolderMount that mount internal storage folders (like OBB) to the external card?
[Galaxy Tab S General] Monster212:
i am going to install the T700 and see how it goes...
[Galaxy Tab S General] freaksamael:
All good on T805 (T805XXU1BOE3) (using other f2fs enabled kernel). Thank you!
[Galaxy Tab S General] SkOrPn:
I would like to tell [MENTION=4899305]ashyx[/MENTION] a very enthusiastic THANK YOU for taking the time to put this guide and F2FS kernel together. We need more developers like you man. I'm happy I do not have to give up F2FS just because I got a new device, so thank you for this.

I would like to ask anyone who has not thanked ashyx, to please take the time and hit his thanks button. He deserves it :good:
[Galaxy Tab S General] ashyx:
Much appreciated, thanks for the feedback. :thumbup:
[Galaxy Tab S General] SkOrPn:
Your most welcome. Going to test this on stock 5.0.2 on my T700 here soon.
[Galaxy Tab S General] ashyx:
Updated the kernel sources in op.
[Galaxy Tab S General] SkOrPn:
After flashing the new T700 kernel it does not boot for me. Saw the Samsung logo as usual for about 5 minutes maybe, but then the logo disappeared and then nothing. Seems to have shut down. The power button no longer worked to boot up either. However, it goes into Download Mode just fine.

Going to flash it again. BRB with some news. Thanks

EDIT: Flashed a second time and still the same, ROM will not boot on the BOE6 kernel. Thanks again
[Galaxy Tab S General] ashyx:
Which firmware base are you running?
[Galaxy Tab S General] SkOrPn:
I was running CarbonROM 5.1.1.

I can no longer boot system, and it wont boot to recovery either. What is the button combo for recovery again? Maybe I have it wrong.

I thought I had downloaded a zip for stock 5.0.2, but I cant find the darn thing now, lol. I have a TWRP backup of 4.4.2 and 5.0.2 (I think), but I'm on 5.0.2 Bootloader. Plus I need TWRP mode in order to even restore the backups.

is there a ODIN tar of 5.0.2, preferably rooted? I found TWDetox, but its a zip for TWRP to install. Damn it, lol I know for fact I found a tar for 5.0.2 but now I can't find it. I need to find a RedBull maybe that will help me locate it. LOL
[Galaxy Tab S General] ashyx:
POWER + VOL DOWN + HOME as soon as it restarts quickly change to VOL UP whilst still holding the other buttons.
[Galaxy Tab S General] SkOrPn:
Hmm, thanks I have not seen that combo mentioned anywhere on the internet yet. You rock dude, it worked... :good:
[Galaxy Tab S General] ashyx:
Does Carbonrom even boot with a stock kernel, it's CM based?

The kernels are intended for stock based roms.
[Galaxy Tab S General] SkOrPn:
Yeah, I flashed stock about 20 minutes ago. Just waiting for it to restore my apps etc before I proceed any further. Will try again here in a bit. Thanks again ashyx :good:
[Galaxy Tab S General] Monster212:
instead of restoring data and cache folders can i just flash a new rom instead of moving the data and cache folders back?? or will i lose the f2fs??
[Galaxy Tab S General] SkOrPn:
OK, just flashed the new BOE6 Kernel and it booted really fast, kinda even surprised me. However, I forgot to backup /data and flashed the kernel first. So its running just fine using ext4 :good:

Now I have to backup /data (probably the rom actually), then format to f2fs and give it another test. I'm not really seeing f2fs as much better on this device like it was on my N7 and reports around these forums seem to suggest. What is strange is that on my N7 it showed twice as good storage IO, but everything else is FAR behind, lol. I tested it on a CM based ROM though. Now time to test this stock 5.0.2 ROM with f2fs, and then decide if I want to keep it.

[MENTION=4899305]ashyx[/MENTION], thanks for the updated kernels and recovery. Now I know why I waited so long to get this device.. I was waiting for you to make it better :D
[Galaxy Tab S General] ashyx:
Once you have formatted to f2fs you don't need to restore your data (no need to backup or restore cache)

If you don't restore you will basically boot to a fresh system.

You can flash any Rom you want as long as it only flashes the system partition or if it also has a boot.img it supports f2fs.
[Galaxy Tab S General] ashyx:
Good stuff, keep me updated with your tests.
[Galaxy Tab S General] SkOrPn:
Yay, I got it all restored and sorted finally. F2FS is now the file system of choice on cache and data. However, its now getting late here so I will settle in for the evening, and do the tests later on Monday. So, yes the BOE6 kernel is running great so far for T700. :good:

Some people must be real sensitive because I cant "feel" the difference by just using the device, so I will definitely need to use a storage benchmark to see what we are really dealing with. This is very fun and I almost forgot how wonderful it is to work with a new device, lol. :D
[Galaxy Tab S General] samwheat:
Much faster/snappier/smoother with F2FS !

Tested with IronRom 2.2 T800

Thank you for this!
[Galaxy Tab S General] Monster212:
i installed the SM-T700 BOE6 KERNEL with stock rom and wow i must say running in F2FS the system seems to run smoother and is very very stable no issues have popped up for me yet.. if they do i will report here with logs.. great work ashyx!!!
[Galaxy Tab S General] SkOrPn:
Well guys i did some tests and not seeing f2fs as an improvement here. Sure like to see some proof if you guys can. The benchmarks show its a slowdown at almost everything. So idk now...

I will post some screenshots later in the general forum later. And yes its nice and smooth here to, but was so on ext4 as well.
[Galaxy Tab S General] Monster212:
not sure what rom you are using but i am running stock rom, plus the kernal from this post.. and it runs smooth fast no lag, and apps and games open up fast... i will look for a app i can download on my phone to check the speeds...
[Galaxy Tab S General] samwheat:
Yes in tests ... But in real life its something else ... I was having Nexus 10 before and finnaly founded the sweet spot using f2fs. Same seems to happen here. And this is just the beginning thanks to this smart developers here on Tab s forum.

Few weeks ago, Nexus 10 f2fs faster/smoother/lag free than T800 stock, no root, ext4. Now things started to change dramatically ... And remember, Samsung its not stupid, they will continue to bring more close to maturity this different view of them, trying to close the gap on Apple. I think
[Galaxy Tab S General] SkOrPn:
What I would like to see is Samsung get a move on with F2FS and officially use it themselves, since it is their file system, lol. You get F2FS by default on the Nexus 9, yet that isn't even a Samsung device. Its manufactured by HTC for Google, lol. On my N7 I clearly seen a difference via my eyes and IO tests showed a doubling/tripling of random 4kb write speeds. Testing storage IO and transfer speeds is the only way to see if its really faster or not because that is the whole point of using it. It can't be smoother with slower storage IO operation, lol it doesn't work like that. Smoother comes with tasks being done sooner, much sooner in order to even notice it. Now I see why the N7 got F2FS so much faster, early 2014, then other devices, it actually got a massive improvement using it.

Anyone know of a sure fire test we can do? Maybe a iso transfer from a fast SSD to the /data partition, and timed as accurately as possible?

F2FS results on stock 5.0.2

EXT4 results on stock 5.0.2
[Galaxy Tab S General] citytrader:
Is easy to understand looking at the benchmarks that the F2FS is not better than EXT4 and for that is not implemented by Samsung.
[Galaxy Tab S General] SkOrPn:
Its not better "Yet" anyway. It was 3 times better on random writes on my Nexus 7, but I'm not seeing any improvement on my TAB S. The smoothness is identical though, so no slow down has been caused by formatting to F2FS.

F2FS is built for eMMC and SSD type storage, so in the end it is better for our devices, but it just needs to mature. I have not seen much work being done on it, but I admit I do not know where to look for changes and dates of work being done, so it could still be an active project. On the list of things to do it still shows the same goals as it did 6 months ago. lol
[Galaxy Tab S General] ashyx:
Motorola are shipping some of their devices with f2fs, so there must be a reason.
[Galaxy Tab S General] SkOrPn:
Yeah, I am pretty sure its because some eMMC chips work better with certain file systems. My eMMC on the old 2012 Nexus 7 is twice as fast as this TAB S eMMC when using EXT4, and three times faster using F2FS (its the rest of the device that seems to suffer). So, probably they do tests themselves and if it runs better with F2FS then that is what they use. I think F2FS will become the standard for mobile devices someday. I wish they would make it a priority to release a windows driver for F2FS, lol.

EDIT: What I mean is the Storage IO, not the actual speeds of the eMMC. It is a well known fact that the 2012 Nexus 7 had a terrible nand chip for random writes. During tests though Storage IO seems to be better with F2FS.
[Galaxy Tab S General] citytrader:
Seems that in old devices there is an advantage but in the new ones nope :) ... even in my LG G2 there is no advantage in using F2FS, the same is happening with the TAB S :D
[Galaxy Tab S General] ashyx:
I'll do some testing myself when i get time. There is one thing for sure my device boots up almost 10 secs faster on f2fs. My boot time is 39s. On ext4 it was 49s or more. Ive even seen 36s an odd time on f2fs.
[Galaxy Tab S General] SkOrPn:
Being built from the ground up for the characteristics of solid state is an advantage in of itself. Using F2FS "probably" has a greater life expectancy for solid state. EXT4 was built for spinning magnetic based storage systems, so it has features at play that were never meant for solid state. F2FS is better and newer, it just does not perform as good yet.

---------- Post added at 01:18 PM ---------- Previous post was at 01:13 PM ----------

I got the same thing to. Much faster boot it seems. This seems to suggest that it is reading data faster into ram, which seems to contradict all tests that have ever been done. EXT4 is faster at reading for sure... So the only for sure thing known here, is we just do not know whats happening... LOL

By the way, I'm not knocking on F2FS. I plan to keep using it just because its built from the ground up for my storage type. If my device had tiny platter drives, then I would be using ext4. Simple as that....
[Galaxy Tab S General] citytrader:
if you copy some big file to /data using x-plore how much is the transfer rate?
[Galaxy Tab S General] ashyx:
What's x-plore?
[Galaxy Tab S General] citytrader:
File manager (it gives you the MB/s transfer rate when do a copy):

https://play.google.com/store/apps/details?id=com.lonelycatgames.Xplore&hl=en
[Galaxy Tab S General] ashyx:
Copy from where to where?
[Galaxy Tab S General] citytrader:
you can do copy from anywhere in the inside memory to /data for example a rom.zip and copy from /data to /data, to see how is the copy from/to F2FS
[Galaxy Tab S General] ashyx:
I know that, but I was asking where you wanted me to do it for comparison.

Also I don't see this is going to give a real indication of write speed.

We are still copying from the same storage so I/O is going to be affected.

The same with these benchmarking apps, it's all being done using the same storage regardless of whether one part is ext4 and another is f2fs and surely is going to affect I/O.

The right way would be a cached read from ram to data as the ram on this device is much faster. Not sure if these benchmarking apps are doing this.

I think a test outside of storage to data needs to be done say from usb hard drive to data.

Also maybe outside of android too, possibly by using adb in recovery to usb otg from hard drive to data.
[Galaxy Tab S General] citytrader:
I agree with you but if the file system is better, I think even copying inside the same filesystem should show an improvement
[Galaxy Tab S General] Kyo-Ito:
T800 and SD Card in Recovery !

High

I Can't restore :(

SD Card and USB Otg unrecognized in recovery !
[Galaxy Tab S General] SkOrPn:
Did you mount the USB?

---------- Post added at 08:57 AM ---------- Previous post was at 08:51 AM ----------

If only Samsung had included a usb 3.0 port instead as I have a very fast usb 3.0 to SSD adapter and several fast SSD's I could have tested with. But your right, it's only a worthwhile test if the source media is faster at everything then the target media. When the app says it is preparing the test, I think that is what it is doing, copying data to the ram first.

---------- Post added at 09:08 AM ---------- Previous post was at 08:57 AM ----------

Nope, that is not how it works. Regarding F2FS we are only concerned with 4kb random write speeds. With ext4 it has slightly superior read speeds according to known professionals who regularly test this stuff. F2FS having, or thought to have much better writes means that you would prefer using it on partitions that are written to frequently, such as cache. If you read something at a slow speed, then you will be writing it at that speed at best. You cannot write something faster then what it is being read at. That can only work if you are reading from a device that is presumably much faster than the device your writing to. Reading from faster Ram to the storage partitions in question is ideal because we assume the storage partition has a much slower max write speed then what Ram can read it at. Thus writes are theoretically at the fastest possible for the device in question.

The most important aspect of a good file system for the random nature of a operating system is its ability to randomly write data. F2FS supposedly accels at doing that on solid state.

Hope that made it a bit clearer to you.

By the way, F2FS is not considered a better file system because it's faster, its considered better because it's made specifically for our type of hardware. Ext4 was built from the ground up for your old spinning magnetic hard drives, which we do not have here on these mobile devices.
[Galaxy Tab S General] Kyo-Ito:
Thanks for you detailed reply

" Did you mount the USB ? "

Yes !

SD Card files open, but also close immediatly.

Maybe because it's a non fat32 128GB ?!
[Galaxy Tab S General] SkOrPn:
What file system did you use? I think Fat32, exFAT and all the linux file systems (ext*) are OK to use. The OP uses exFAT, so that is what I am using with no problems :good:

Try doing this next (if you haven't already)

1. Copy your contents to a computer.

2. Format the sdcard, or USB to exFAT.

3. Copy back the data to the newly formatted device.

4. Now try it again.

5. Report back please.
[Galaxy Tab S General] Kyo-Ito:
No change: crying: !
[Galaxy Tab S General] ashyx:
Your sd card is probably either fake or fubarred.
[Galaxy Tab S General] Kyo-Ito:
High !

The SD works fine before on Ext4 !
[Galaxy Tab S General] ashyx:
You should be using fat for the sd card for compatibilities sake.
[Galaxy Tab S General] Kyo-Ito:
Recovery's OK !

Just buggy on using !
[Galaxy Tab S General] ashyx:
Which recovery?
[Galaxy Tab S General] Kyo-Ito:
With Recovery it's OK !

Tried again, all seem to be ok !

Thanks :svetius:
[Galaxy Tab S General] samwheat:
Where can i find a zip variant for t800 ? Or how to convert .tar in .zip so i can flash it in recovery ?

Thank you
[Galaxy Tab S General] ashyx:
Zip for what?
[Galaxy Tab S General] meduza:
You will need the recovery.img inside the tar archive :)

m.

---------- Post added at 12:56 PM ---------- Previous post was at 12:54 PM ----------

I guess, he means a via recovery flushable zip.

m.
[Galaxy Tab S General] ashyx:
Jeez, :eek: if your that pushed for connecting your tablet to a usb cable, then just flash with FLASHFIRE.
[Galaxy Tab S General] UpInTheAir:
For those that use F2FS and maybe wish to try updated source in custom kernel, you can find it in my SkyHigh TW LL kernel thread.

[MENTION=4899305]ashyx[/MENTION] , you can find the source changes in my github repo. I started sorting and cherry-picking 60+ commits from https://git.kernel.org/cgit/linux/kernel/git/jaegeuk/f2fs.git/log/?h=linux-3.4, but discovered arter97 had done the "hard yards" by patching 100's of commits to August for 3.4 :) Thank you [MENTION=4898097]arter97[/MENTION] and open-source !!

The F2FS update seems to work fine on my T705. Maybe you wish to update the "stock" kernel you have posted?

I might also please make a small request. I know that your posted kernels have minimal changes from Samsung open-source, but as it is still modified and then compiled, it would be appreciated if you could post your source to comply with GPL legalities and XDA sharing policy. There aren't any exceptions ;) If you need help to set up or further guidance, I would be happy to help or our friendly forum Moderator :)
[Galaxy Tab S General] zavien3:
I've had my Tab S 10.5 T800 for quite a while now and have been less than pleased with its performance. Stock, Bliss, and down the list, no matter what I've put on it- it seemed something was inherently wrong with the Tab S. It has always been a bit sluggish considering the specs. My Note 3 and Nexus 10 seemed more responsive. I've been rather disappointed until today. I've been running the Slim build and noticed today F2FS was now supported. Flashed it with F2FS and its pretty unbelievable what a difference it has made. I've tried F2FS on other devices and seen little if any noticeable difference until now. No lag, smooth, responsive, and benchmarks are great. Highly suggest trying it and truly encourage further development on this.
[Galaxy Tab S General] stopa10:
Yes, I can confirm this: Lollipop and F2FS really made a difference for the Tab S ☺
[Galaxy Tab S General] meduza:
...o.k., then I`ll do it too... Need just to backup data/media... this is preventing me to format the data partition till now...

m.
[Galaxy Tab S General] bibihub:
OK so I just did it and there might be a slight difference but I'm not sure if it is a placebo or if it is really working.
[Galaxy Tab S General] zavien3:
It is showing in benchmarks. Antutu I never got above a 32000. I got a 39000 today. Maybe its not entirely F2FS. Its possible F2FS is simply a bandaid for a different problem. I'm starting to think Samsung royally screwed up on this device from the get go. There's something seriously wrong with the software/hardware handshake in their source. Not sure what it is. This device has always been like turbo lag, it will dog, spool, and then fly. 5 seconds later its struggling to render a webpage again. So strange. I ran into this previously on my Nexus 10, factory 5.0 to 5.02 made the tablet almost unusable. 5.1.1 update made the Nexus seem like it gained 4 more processors and another 2 gigs of ram. It was a completely different device. Obviously if F2FS is showing results, further inspection of Sammy's source code might reveal the real problem. The specs on the T800 should yield much better performance than what it is. When my Note 3 is running circles around it, there must be problem.
[Galaxy Tab S General] bibihub:
Since I debloated this tab even when not rooted by disabling apps, I was around 39000 that's why I didn't really see any difference in benchmarks. But speaking about user experience, the tab is still a little laggy sometimes (in parameters, when pulling down the status bar and many more). So you are right about something wrong in the performances.

From what I understood it could be related to the resolution of the screen which is too high for the weak processor of the tab. I have been trying to find a way to decrease this resolution (like you would do with a computer) with the wm size command but it doesn't work on the tab while it does on my nexus 4. Too bad
[Galaxy Tab S General] zavien3:
Sucks. The AMOLED screen is just stunning..Theres not a tablet on the market that even comes close to touching this thing and it appears Samsung has abandoned it, and there's only a handful of developers interested in the device. I thought for sure when I bought this it was going to be the hottest tablet around. I thought Official CM would be only weeks away. Such a bummer.
[Galaxy Tab S General] meduza:
Fortunately I can't confirm any of this!! The tab was very smooth and fast an stock Android 5.0.2 and is even smoother and faster with diegocr`s SLIM and the deadman kernel :)

[MENTION=1185549]zawien3[/MENTION],

screens resolution can be adjust in build.prop or directly in the display settings of a SLIM ROM.

m.