Dear Friends,
angelom said:
I tried now with a USB stick format ntfs
1) I inserted the file ntfs-3g for GS2 in /system/bin with the proper permissions
2) Reboot
3)Then I inserted the usb stick with the otg cable into the phone, so I typed from the terminal emulator:
su
insmod /lib/modules/fuse.ko
ntfs-3g /dev/block/sda1 /mnt/usb
And now the usb stick can be read and written
Click to expand...
Click to collapse
AbyssNote Kernel developer " angelom " pointed us solution for read/write ntfs for formatted usb stick and i apply it for sdcard and both works flawlessly !!!! Thanks angelom...
Some Tests:
** After mounting sdcard as read/write ntfs, camera app also can be able to record photos and videos to ntfs...
** Watching movies over 4 gb size is not a problem anymore. 1080p Mkvs with no lag at all...
** Most of the 3rd Party apps recognize ntfs formatted sdcard like it is fat32...
** Stock Video Player dont see NTFS so i use BSPLAYER LITE ( best for mkv on note ) OR MX VIDEO PLAYER !!! ( U can use ES file explorer to play videos with stock video player )
** Stock app like gallery dont see the files in ntfs sdcard... Quickpic app also doesnt work with ntfs formatted sd card...
PERFECT VIEWER CAN DISPLAY IMAGES AVAILABLE FROM NTFS SDCARD.... ( THANKS BROTBUEXE)
** You can use free apps like MyMusicOn or MixZing Basic to play music files which are in ntfs formatted sdcard...
** We have to repeat steps 4 and 5 after every reboot. Gscript lite app helps here so much with its shortcuts...
** We have to repeat steps 4 and 5 after using usb mass storage mode...
** Ntfs formatted sdcard also is recognized by windows when Gnote is using usb mass storage mode...
** I am getting very low transfer speed for small files in windows when Gnote is using usb mass storage mode... for big files it is as fast as Fat32...
My config:
MySAM ed.1 Rom
Abyss V2.5 Kernel
32 gb class4 SDCard
How to: READ/WRITE NTFS
1- Flash Abyssnote Kernel - Latest Version : http://forum.xda-developers.com/showthread.php?t=1362424
2- Format sdcard to ntfs in windows and plug it to phone.
3- Power on phone and GNote will recognize ntfs formatted sdcard as blank sd.
4- Download ntfs-3g.zip from attachment...
4- Extract zip and copy " ntfs-3g " to /system/bin/
5- Reboot
6- Install Terminal Emulator from market.
7- Enter these lines in terminal emulator. ( insmod commands are optional for abyssnote kernel since they are loaded automatically but for other kernels u have to use insmod commands )
a- To mount ntfs formatted sdcard
su
chmod 755 /system/bin/ntfs-3g
insmod /lib/modules/fuse.ko
ntfs-3g /dev/block/mmcblk1p1 /mnt/sdcard/external_sd
vold
b- To mount ntfs formatted usb hdd or usb stick
su
chmod 755 /system/bin/ntfs-3g
insmod /lib/modules/fuse.ko
ntfs-3g /dev/block/sda1 /mnt/usb
vold
or create a newfolder named usb in internal sdcard
su
chmod 755 /system/bin/ntfs-3g
insmod /lib/modules/fuse.ko
ntfs-3g /dev/block/sda1 /mnt/sdcard/usb
vold
5- now goto settings-storage and select mount sdcard ( only for sdcard not usb stick )
6- now your ntfs formatted sdcard or usb memory stick should be recognized by system as read/write
7- After every reboot u have to repeat steps 4 and 5 !!!
8- To unmount usb hdd:
a- Run Terminal Emulator
b- Enter This line:
su
umount -l -f /mnt/usb
umount -l -f /mnt/sdcard/usb
c- now your usb hdd is unmounted.
d- You can safely remove it from otg cable.
** You can download "Gscript Lite" from market and create these scripts as shortcuts in your home screen so u dont have to enter line every time after reboot... ( Market - Free )
** Use "Autostart" app or "script manager" app to run script on boot... ( Market - Free )
** Use "elixir 2 widgets" app or " any cut " app to create a shortcut directly on home screen to settings-storage... ( Market - Free )
*** UPDATE 10-JAN-2012
I realized that after executing ntfs-3g , our ntfs formatted card is automatically mounted by the system even it says Blank SD in notification page... No need to go to settings-storage-mount sd card...
So if the blank sd message in noti. doesnt bother us, then no need to look for how to mount ntfs sd automatically... It is already mounted...
I use script manager to load the ntfs-3g script during boot and thats it... After boot i use my ntfs formatted card...
*** UPDATE 21-JAN-2012
While trying to get rid of blank sd noti, after running vold command, noti has gone, surprisingly...
No more " Blank SDCARD " or " Blank Usb Storage " in the notification bar.
Simply add " vold " command to end of script
...
After reboot "blank sd" noti will gone...
vold command remounts all storage.
Dont bother even settings-storage shows sdcard as unavailable since it is already mounted and recognized by the system...
Hope this helps,
THANKS GOES TO angelom, The_Steph, brotbuexe and to all who i forgot to mention....
Kind Regards,
ONLY AMIGA MAKES IT POSSIBLE !!!
Dear Friends,
Here is some info for read/write ntfs by fuse.ko module and ntfs-3g driver for GalaxyS2 but they failed to run in G-note when i try in terminal emulator...
http://forum.xda-developers.com/showpost.php?p=15001824&postcount=23
I hope someone may recompile fuse.ko for G-Note so we can use ntfs as read/write ... I dont know whether kernels has to be patched for fuse.ko support or not...
********** OLD INFO for READONLY NTFS as REFERANCE - OUTDATED !!!
I have managed to read ntfs for both ex.sdcard ( tested ) and usb otg devices ( not tested )... Needs ROOT ! Ntfs Read Only !
I wish some devs recompile ntfs.ko module as read/write so we can use all time ntfs formatted ex.sdcards...
Sdcard method is tested by me and i have watched 10 gb " last samurai " 1080P mkv movie with mx player flawlessly...
I dont have a usb otg cable so i couldnt test usb hdd or usb stick but i guess they will work, too. ( your feedback is needed here )
All Info is collected from xda forums. Combined and tested by me for G-Note...
My config:
MySAM ed.1 Rom
Abyss V2.5 Kernel
32 gb SDCard
How to: READONLY NTFS
1- Format sdcard to ntfs in windows and plug it to phone.
2- Power on phone and GNote will recognize ntfs formatted sdcard as blank sd.
3- Install Terminal Emulator from market.
4- Enter these lines in terminal emulator.
a- To mount ntfs formatted sdcard
su
insmod /lib/modules/ntfs.ko
mount -o umask=000 -t ntfs /dev/block/mmcblk1p1 /mnt/sdcard/external_sd
b- To mount ntfs formatted usb hdd or usb stick
su
insmod /lib/modules/ntfs.ko
mount -o umask=000 -t ntfs /dev/block/sda1 /mnt/usb
5- now goto settings-storage and select mount sdcard
6- now your ntfs formatted sdcard should be recognized by system as external_sd but READONLY. You can play full size mkv movies...
To unmount usb hdd:
1- Run Terminal Emulator
2- Enter This line:
su
umount -l -f /mnt/usb
3- now your usb hdd is unmounted.
4- You can safely remove it from otg cable.
** You can download "Gscript Lite" from market and create these scripts as shortcuts in your home screen...
Kind Regards,
PROTOCHIP,
I carefully read your posts but I don't understand where ntfs.ko comes from. I used MySam Ed and AbyssNote kernel (I am on KL7 now) and I did not manage to understand where that ntfs.ko modules is. I saw your posts with angelom on AbyssNote thread but the question still remains.
Can you explain where it is from and if, for instance I could use it with another kernels ?
As I have ordered a 64 micro SDXC card for my toy, I really expect to be able to see films in HD with being bothered by file size. And if it is possible to have a read/write access to the card, it would be really amazing.
Thanks in advance for the upcoming info on the subject.
Dear The_Steph,
Actually i dont know where the file comes from but after flashing MySAM rom to phone, ntfs.ko is located in /lib/modules/ ... In case it is needed, i have enclosed the file here ... You can copy it to /lib/modules/ and try with other kernels... I tested it by Abyss but for ChainFire kernel and FM Kernel, i didnt test it...
My sdcard is class4 32 gb and watching Last Samurai as 1080p mkv from ntfs formatted sdcard is amazing... The mkv file is around 10.2 gb...
For ntfs read/write ; there is another module called fuse.ko and driver called ntfs-3g but as far as i know these modules have to be recompiled for our kernels...
Hope this helps,
Kind Regards,
PROTOCHIP,
It is not in stock KL7 ROM and does not seems to be in MySam too. I read the post you linked. I understand now a bit more.
As I am planning to move to XtraLiteRom from Cassie today, I will try to do some tests tomorrow using the ntfs.ko and above 4GB files. I'll reports afterwards.
As you stated, maybe read/write library can be recompiled for the SGN.
It it is possible it would be awesome. Hopefully, a master in modules compilation will see this thread
Edit: I hope I helped a bit posting reference to this thread in RiverSource kernel thread.
Really looking forward to development on this matter.
I tried now with a USB stick format ntfs
1) I inserted the file ntfs-3g for GS2 in /system/bin with the proper permissions
2) Reboot
3)Then I inserted the usb stick with the otg cable into the phone, so I typed from the terminal emulator:
su
insmod /lib/modules/fuse.ko
ntfs-3g /dev/block/sda1 /mnt/usb
And now the usb stick can be read and written
angelom said:
I tried now with a USB stick format ntfs
1) I inserted the file ntfs-3g for GS2 in /system/bin with the proper permissions
2) Reboot
3)Then I inserted the usb stick with the otg cable into the phone, so I typed from the terminal emulator:
su
insmod /lib/modules/fuse.ko
ntfs-3g /dev/block/sda1 /mnt/usb
And now the usb stick can be read and written
Click to expand...
Click to collapse
Dear angelom,
Thats great... Gonna try it again... Thanks...
EDIT : It is working... THANKS... GUIDE AND TOPIC UPDATED !!!
Kind regards,
Sent from my GT-N7000 using xda premium
As planned, I did some tests this morning with my Cassie's XtraLiteROM v5 (stock KL7 kernel) as I have a spare 16GB micro SDHC card.
I formatted my card in NTFS and put it in the slot. Rebooted my SGN and got the message as my SD Card is empty. So i plugged my SGN to my PC to see what was wrong with libraires.
First point, as I use Multimount SDCard, my internal memory and external SD card are automatically mounted when my SGN is connected via USB. Which make me realised that even if librairies were not working, the NTFS formatted card can be read/written by Windows even if the SGN is not able to read it.
Once that seen, I tried to do your step by step tutorial (which was not working because I initially forgot fuse.ko in /lib/modules) and got the following error message:
insmod: init_module '/lib/modules/fuse.ko' failed (Exec format error).
So I created a /sdcard/ntfs-3g/ folder and put fuse.ko in it as I saw on another thread but it did not work. I rebooted my SGN and found that what was working the first time (automatic mount of SD cards) did not work anymore. Strange.
Looking for clues on Google, it seems that fuse.ko needs to be compiled for the kernel magic number to properly start (CL823206 for XXKL7). So, two cases: we are lucky that the kernel magic number was the same as angelom base (what a luck), or angelom compiled the fuse.ko for his kernel magic number (likely).
So my question is now, did angelom compiled the fuse.ko file for his kernel?
Next steps for me are to move my KL7 kernel to angelom's and to automate the SDCard mounting process (I'm pretty sure a script in init.d could do the trick).
Dear The_Steph,
Pls Follow the steps in the updated first post and the right files are also enclosed in the post. I guess u have to flash Abyss kernel... My Sdcard is now ntfs and even the camera app can read and write to it... Just woow... Now Watching 1080p Avatar movie... show off time !!!
Kind Regards,
Other than the ability to use bigger size files, is there any advantage of using ntfs ?
THere are the new 64gb cards . was wondering if there would be any benefit in using them in ntfs
drgopoos said:
Other than the ability to use bigger size files, is there any advantage of using ntfs ?
THere are the new 64gb cards . was wondering if there would be any benefit in using them in ntfs
Click to expand...
Click to collapse
Dear drgopoos,
Main purpose is to be able to use larger files than 4 gb, other then i didnt realize any speed improvements regarding to my short time tests... Forum User " The_Steph " got a new 64 gb SDXC card and he is starting to test it with ntfs i guess... He will kindly report back soon...
Kind Regards,
My 64 card has been ordered at Amazon and it is planned to be delivered to my house the 4th of January.
As the SGN does have a big enough internal memory to store all daily files such as applications, pictures and data, my only aim using this modules is to be able to store HD movies on it (always bigger than 4GB) as I mainly use my SGN as an HD PMP during my daily commuting. I don't really care about the rest since as I said eearlier, it cans be hosted in the internal memory.
I am currently doing some tests with an old 16GB SD Card before my big jump to the 64GB world
I have now tests to do with AbyssNote 2.5 kernel then
An aditional question, is you fuse.ko removed from /lib/modules each time you restart your SGN?
The_Steph said:
An aditional question, is you fuse.ko removed from /lib/modules each time you restart your SGN?
Click to expand...
Click to collapse
Dear The_Steph,
No, It is always in /lib/modules... I have several times restarted my Gnote and never copied fuse.ko... Weird...
Kind Regards,
PROTOCHIP,
I think this then because of angelom that kindly added fuse.ko and ntfs.ko in the /lib/modules
Moved to angelom's AbyssNote 2.6 kernel and did your step by step procedure. Everything is now working perfectly
Next point is now how to automate it to automatically mount the card at Android startup and unmount it when shutting it down.
Dear The_Steph,
Yeah these files must be related with the kernel itself... By the way, is abyss v2.6 released? I cant find it...
Kind Regards,
PROTOCHIP,
Did not look for AbyssNote 2.6 yet as I was working on automation.
BTW, I succeded in automation of launching script with autostart https://market.android.com/details?id=nk.bla.android.autostart.
Last point to do is finding the settings > mount SD card script line to finalise a complete NTFS formatted card mount script at start
Once done, I will create a CWM flashable file to ease the process.
I have voted this thread 5-star that it deserves. CHEERS.
Here's my experience so far using stock KL7 deodexed ROM with Abyss kernel 2.5:
0. Firstly, I have a 32GB MicroSD card and I have successfully copied a 10gig 1080p MKV video file to it and played it without any issues on my Note thanks to this thread. THANK YOU heaps.
1. Using 'Script Manager' app, I can auto-run the script at bootup. But I still need to manually go to settings - storage and mount SD for it to be actually mounted. Is there a command to do this also at boot up via the same script? or is there no other way to mount it?
2. I noticed that all the video files in the \sdcard\external_sd are not seen by the media scanner. So the videos do not show up in Videos app and my favorite video player which is Act 1 Video player. (it just goes by the media scanner indexing and has no option to specify folders manually) Is there a way around this? or is this a limitation that is unavoidable?
3. I have no issues with connecting it as mass storage to my PC using USB cable and can copy files without any issues or speed loss to my MicroSD card. Awesome. (I get 11MB/sec consistent write to my Lexar 32GB class 10 card)
Anyways, overall, I'm super duper happy. =)
But yeah, solutions for #1 and #2 would make it perfect.
Dear jakiman,
Thanks for the feedback...
1- We are all looking for a solution to mount automatically... At least in new abyss kernel V2.6, fuse.ko will be automatically loaded during startup so there will be no need to use it in scripts i guess...
Use Autostart app or script manager to run script on boot...
Use elixir 2 widgets app to create a shortcut directly to settings-storage...
2- Stock apps has problems recognizing ntfs files... We have to use 3rd party alternatives...
For videos i use mxplayer and bsplayer.. Bsplayer is much more smooth that make me shocked...
For photos neither stock nor 3rd party apps i tried could read ntfs files... So viewing photos from ntfs is still problem... i select the file with es file explorer and then choose gallery to show photo file from ntfs.... I copied all photo files to internal memory for a temporary solution...
3- My card is 32 gb class4 and that may be the problem for copying small files... For big files like movies i get 7 mb/s transfer rate with usb mass storage mode on windows7...
Kind Regards,
Sent from my GT-N7000
Hello, if you have a ROM and are going to support OTG, and NTFS, check out this post:
http://forum.xda-developers.com/showthread.php?t=1724078
I was getting extremely frustrating when nothing that I tried worked to get my external NTFS hard drive mounted read-write. It would only mount read-only. I even tried the only rom I found that said it supported OTG, and ntfs, but that too only let me mount r/o. I even tried Stickmount from google play. And another rom there too for good measure, but none of it worked.
So I stumbled upon this, and in less than a minute, I solved the problem I was trying to fix for hours today.
It would be great if devs could integrate this into their roms so people wouldn't have to mess with it, but whatever.
Also if you aren't a dev and you just want to plug in your NTFS drive and be able to read AND write, check out the app he wrote: http://forum.xda-developers.com/showthread.php?t=1588940
You won't regret it!
Hello,
I re-open this thread because I have new information about the compatibility of N.E.A.K. kernel with my card formatted in exFAT.
N.E.A.K. Kernel don't support this file system!!! That's the reason why my card doesn't work with...
I restart to "0" because I think the alone solution is to use EXT4 with auto-mount at boot.
@ scote (or other):
Can I use your manual mount cmd on init.d or other way?
Hello,
With n7100 international + Omega v10 (Android 4.1.2 based) + N.E.A.K. kernel v1.4x
With various µSD card (but especially with my new Sandisk UHS 64Go) I would know how to use ext4 filesystem.
After computer formatting in ext4 the card can't be really usable by phone:
- Storage menu don't see him.
- Recovery can't do anything with (mount / format)
- Some apps can see him. (like empty 64GB / or 0Gb card capacity !)
- ES Files explorer work with but by the /mnt/extsd/card directory and if no SD card in slot work to !!!
thus I expect doesn't work really
If you have any information about what work, can or can't work, or anything about filesystems, software...
Thank you
Click to expand...
Click to collapse
I had the same thing happen. I plugged it not my computers sd card reader and the computer acted as if nothing was there. I tried to force a format through DOS but it failed. Ultimately I had to buy a new MicroSD card.... Now it works.
Update: Card doesn't work with my reader/computer
What file system are you using?
Why not just use exFat? It useable on Note 2 and readable by Windows. Just make sure to use the latest TWRP for system bqckup
Re: SD Card file system usable by OS apps
You can mount ext4 file system manually if you are rooted, from a terminal or adb shell
mount -t ext4 /dev/block/mmcblk1p1 <some directory>
substitute <some directory> with the path without the <> I used /sdcard/mnt
of course if you wont be able to read the card with windows pcs
I think there might be an app to do this for you, usb mounter
Android won't mount ext4 by default.
Also, windows can't mount ext4 drives but you can use something like minitool partition wizard to reformat it to ExFAT or NTFS if you're on samsung ROMs, or Fat32 if you're using CM/AOSP ROMs.
Pongster said he'd be making a test kernel to see if he can get ext4 to auto-mount in the HyperDroid JBX thread, but that's not released yet.
You aren't using TWRP 2.4.0.0 or 2.4.0.1 by chance?
!!! Sorry, XDA doesn't mail me for new answer.
Thanks your help men
Why not just use exFat? It useable on Note 2 and readable by Windows. Just make sure to use the latest TWRP for system bqckup
Click to expand...
Click to collapse
I don't like Microsoft. If I have a Linux device like Android N7100 I want to use it the more possible with Linux environment.
I useCWM Touch v6.0.1.4-jb moded by Xiaolu. Good?
You can mount ext4 file system manually if you are rooted, from a terminal or adb shell
mount -t ext4 /dev/block/mmcblk1p1 <some directory>
substitute <some directory> with the path without the <> I used /sdcard/mnt
Click to expand...
Click to collapse
Thus can't be used like a FAT SD Card? By Samy explorer and others softs? Can't be see by system like an external card, not possible to manage it very good (capacities disponnible by exemple) ?
You aren't using TWRP 2.4.0.0 or 2.4.0.1 by chance?
Click to expand...
Click to collapse
No; why?
Re: SD Card file system usable by OS apps
Once its mounted any explorer or app dont care or know what the filesystem is
Yes, but can I will see the SD like a "normal" FAT formatted card?
I want to say, in menu/storage like a external SD?
If the card like this, have all the same functionality of FAT card, can you help to auto-mount at boot?
My card is actually broken: phone or PC won't see anything when connected
'll try with a new 64GB in few hours.
Re: SD Card file system usable by OS apps
StreamingMT said:
!!! Sorry, XDA doesn't mail me for new answer.
I don't like Microsoft. If I have a Linux device like Android N7100 I want to use it the more possible with Linux environment.
I useCWM Touch v6.0.1.4-jb moded
Click to expand...
Click to collapse
I don't see how it related. Both fat and exfat are MS. And exFat is the only option works across Note 2 Android, TWRP,Windows, and can be mounted as thumb drive (with the benefit working with > 4gb files). It's up to you if you want to get yourself into troubles by using other format.
Sent from my GT-N7100 using XDA Premium App
jackleung
I like more ext4, but apparently this is a little bit difficult to do what I want (And I think it's what broke my firts SD). Thus I'll use extFAT for my new one.
That's work perferctly! Just funny to see my new card in packging pre-formatted in extFAT...
All is good for me now, thanks you every body for your help ;p
Hello,
I re-open this thread because I have new information about the compatibility of N.E.A.K. kernel with my card formatted in exFAT.
N.E.A.K. Kernel don't support this file system!!! That's the reason why my card doesn't work with...
I restart to "0" because I think the alone solution is to use EXT4 with auto-mount at boot.
@ scote (or other):
Can I use your manual mount cmd on init.d or other way?
Hi there ok so I have my Samsung S5 active I rooted it with towelroot.
So now I am trying to get my ntfs formatted 64Gb sd-card to mount on my phone.
So I write 0 to the full sd-card to allow me to format my sd-card to ntfs on windows without error.
I install 'Paragon NTFS & HFS+ / Tools' on my phone to mount the sd-card it did not work.
So I let and am trying to mount my sd-card using the Terminal, so I use adb shell to access my phone Terminal.
so from what I have found out is that /dev/block/mmcblk1p1 should be my sd-card device, like /dev/sdb1 in linux,
and I am trying to mount it to /storage/extSdCard so I am running the command,
Code:
su
ntfs-3g /dev/block/mmcblk1p1 /storage/extSdCard
and I am getting this error
ntfs-3g-mount: mount failed: Permission denied
I let as far as remounting everything in /proc/mounts to read/write mode and I still got the error and even doing
Code:
chmod 777 /dev/block/mmcblk1p1
chmod 777 /storage
chmod 777 /storage/extSdCard
and I still am get the error
ntfs-3g-mount: mount failed: Permission denied
anyone know what I am doing wrong I ran all the above command as root, and no luck anyone help please.
ps. I really don't what to use exfat every time I mount it in linux it end up getting corrupted and I use linux a lot, and I don't what to use fat32 just in case I ever end up make a file that larger 4G on my phone
Thank You!
I have no issues with the format tool from the phone under storage settings, I too use linux on my main PC and I can browse the card fine just by plugging my phone in with the ad card in it. You really shouldn't be trying to use ntfs with linux anyway, and in case you didnt know android is linux based, so that may be part of your problem. If your phone can read the card correctly then it sounds like an issue with your computer so i would look there possibly.
Rakuu said:
I have no issues with the format tool from the phone under storage settings, I too use linux on my main PC and I can browse the card fine just by plugging my phone in with the ad card in it. You really shouldn't be trying to use ntfs with linux anyway, and in case you didnt know android is linux based, so that may be part of your problem. If your phone can read the card correctly then it sounds like an issue with your computer so i would look there possibly.
Click to expand...
Click to collapse
yea I know I should not use ntfs with linux, and I know android is linux based.
I think it the fact that I am using 64bit linux which is causing the problem with me being able to use exfat with linux
so I thought about trying to get ntfs to work on my phone because I have a ntfs storage partition on my main computer so I reboot into my windows partition and I never have a problem with that.
but anyway I just gave up with trying to use ntfs on my sd-card and format it to ext2 and got it working first try on my phone, now I just hope that next time I'm in windows and I need to move files to my sd-card it will not give me to many problem I know there are way to make it work.
But thank for the help anyway.
As I am rooted without KNOX being triggered, the SELinux permissive mode cannot be enabled. That meant apps such as USB OTG Helper which supports multiple drive formats on OTG attached devices would not work. I tried Stickmount and that did not work either as an USB SDCard drive, formatted as ext4, mounted with an empty folder "/sdcard/usbStorage/sda1".
While searching to find a fix for this issue I found a post by jtaylor991 that indicated a SuperSU policy could fix the empty folder problem even with ext4 formatted drives. I made a flash file adding this policy to "/system/sh.d" which allows the policy to be implemented at boot time. Unfortunately I still had the empty folder issue with Stickmount. I next tried USB OTG Helper which I had been using on my Nexus devices and un-installed Stickmount.
After inserting an ext4 formatted OTG drive (microSD) and using USB OTG Helper to mounted the drive, an error appeared "No drives mounted (code 9)", but the ext4 OTG drive was accessable and had full RW access from directory "/storage/USBOtgDrives/drive_1".
Notes:
The mount failure code 9 can be ignored. This same message appeared on both my Nexus 5 & 10 with no ill effects.
You can configure USB OTG Helper to automatically detect and mount/unmount an OTG Drive.
Two notifications are added, one for USB OTG Helper's error code 9 and another stating "Blank USB Storage ...". The second notification cannot be cleared until the OTG drive is disconnected.
I could not get music or video files to play directly from the OTG drive. These same files copied from the OTG drive to the tablet's internal or external storage play without issue. These music/video files all play perfectly from the mSD card on a Nexus 5 and 10. So far this is the only limitation I have been able to identify. It is likely that an addition of the SuperSU policy could resolve this issue.
I did not explicitly test, all the drive formats that USB OTG Helper supports (ext2,3,4 and NTFS with RW permissions), but those formats are likely to work as well.
Requirements:
You must have a rooted device and SuperSU fully functioning.
You may also need busybox installed but I never tried this without busybox installed. USB OTG Helper has a configuration option to use its own "Internal Busybox", so try that if you do not already have busybox installed.
The SuperSU policy contained in the flash (file at end of post) can be flashed using FlashFire or a custom recovery (e.g. TWRP)
Credits:
Chainfire: For SuperSU and FlashFire apps and posting the SuperSu policy command
jtaylor991: For mentioning that Chainfire's SuperSU policy fixed his ext4 issue
Flash the file to add SuperSU policy: