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[DEV] Native usb storage otg

Made some progress with USB storage without the use of an app. Setup so far is really simple. Add a line to /system/etc/vold.fstab that looks like this:
dev_mount usbdrive /mnt/usbdrive auto /devices/platform/tegra-ehci.0
Still need work on getting the external storage managed by the system.
WARNING:
This is just a first step and with no way to unmount using Android's storage manager you may corrupt your external storage.

calmfury said:
Made some progress with USB storage without the use of an app. Setup so far is really simple. Add a line to /system/etc/vold.fstab that looks like this:
dev_mount usbdrive /mnt/usbdrive auto /devices/platform/tegra-ehci.0
Still need work out how to unmount. hope this helps someone.
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Click to collapse
Does that mean I can back up and restore stuff via otg as if it were my external sd card?
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mrnovanova said:
Does that mean I can back up and restore stuff via otg as if it were my external sd card?
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Click to collapse
u can with the new twrp
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smirkis said:
u can with the new twrp
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NOOOO! I Seriously! And you tell me this now. Thanks I'll give it a whirl.
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Wow I JUST got my OTG yesterday. Fantastic timing.

what this means... hopefully
As it stands now, adding this line will cause your N7 to automount a usb drive to /usbdrive. You will see "preparing usb storage" in the notification bar and your file explorer of choice will see the data in /usbdrive. Unmounting is an issue at this point. I hope to fix that in a few days when I get the time.

https://play.google.com/store/apps/details?id=eu.chainfire.stickmount
I believe this works on the N7 I am waiting on my cable to test. I realize you want to do it without a app but the syntax should be close.
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calmfury said:
Made some progress with USB storage without the use of an app. Setup so far is really simple. Add a line to /system/etc/vold.fstab that looks like this:
dev_mount usbdrive /mnt/usbdrive auto /devices/platform/tegra-ehci.0
Still need work out how to unmount. hope this helps someone.
Click to expand...
Click to collapse
Correct me if I'm wrong but I believe that CM10 already has USB Storage OTG built into it with the last few nightlies.

djkinetic said:
Correct me if I'm wrong but I believe that CM10 already has USB Storage OTG built into it with the last few nightlies.
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Click to collapse
Yes it does from what I know
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a day late and a dollar...
Haven't been following the cm10 builds. Still gonna push forward for the exercise.

People who don't run CM10, can use this method. Would be cool if unmount is done.

Guys, quick question as I'm receiving my N7 tonight, the usb stick format can be ntfs? Or only fat32? Thanks
EDIT: saw from other thread, ntfs seems ok as well. i already got the tab and will start unlock and root.
Tapatalked from my HOX

Versatile1 said:
https://play.google.com/store/apps/details?id=eu.chainfire.stickmount
I believe this works on the N7 I am waiting on my cable to test. I realize you want to do it without a app but the syntax should be close.
Sent from my Galaxy Nexus using Tapatalk 2
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Click to collapse
Just wanted to confirm that stickmount works well with the N7.
I have it installed and I've used it on two different usb drives.
A 32GB PNY USB2.0 Flash Drive Stick
And an 8GB uSD card inserted into an elago II USB Reader.
Both worked without any issues.
However, I'm still intrigued by a method to get usb mass storage support natively w/o an app

That does it...I give in! I gotta try the twrp recovery. Feel like I just decided to cheat on my girlfriend.
Sent from my Nexus 7 using xda premium

I will be following your progress.

calmfury said:
As it stands now, adding this line will cause your N7 to automount a usb drive to /usbdrive. You will see "preparing usb storage" in the notification bar and your file explorer of choice will see the data in /usbdrive. Unmounting is an issue at this point. I hope to fix that in a few days when I get the time.
Click to expand...
Click to collapse
But stickmount already does that and it unmounts it as well.
Sent from my Nexus 7 using XDA Premium HD app

Can someone point me to an otg cable thats on a uk site pleae?
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leelaa said:
Can someone point me to an otg cable thats on a uk site pleae?
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I saw a post about it somewhere around here. Referenced Amazon.uk, the title was USB otg that work and ones that don't I believe. Google can probably get it. If I wasn't using the app I would hook you up.
Sent from my Nexus 7 using xda premium

calmfury said:
Made some progress with USB storage without the use of an app. Setup so far is really simple. Add a line to /system/etc/vold.fstab that looks like this:
dev_mount usbdrive /mnt/usbdrive auto /devices/platform/tegra-ehci.0
Still need work on getting the external storage managed by the system.
WARNING:
This is just a first step and with no way to unmount using Android's storage manager you may corrupt your external storage.
Click to expand...
Click to collapse
Can I ask, does this support NTFS r/w? or r/o.
Everything I've tried, aside from USB OTG Helper--including a CM10 kang rom that claimed to support ntfs OTG--will only mount r/o.
Including the command $ mount -t ntfs /dev/block/sda1 /usbdisk. I guess it's the ntfs driver or something? but it will only mount r/o. Even $ mount -o remount,rw /dev/block/sda1 /usbdisk does not work, it still is ro.

leelaa said:
Can someone point me to an otg cable thats on a uk site pleae?
Sent from my Nexus 7 using Tapatalk 2
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Click to collapse
http://forum.xda-developers.com/showthread.php?t=1812609
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[Q] usb mass storage mode?

How do enable this so I can transfer some files on my computer? I only get mtp or some other camera option. I just want it to show up as a normal drive. Is there a different driver to be installed?

google removed mass storage mode from android (jellybean(?) and later)
(i think it was b/c mass storage mode does not allow the phone to mount /sdcard while connected to PC.... so apps using /sdcard for storage may become unstable... MTP allows both phone and computer to access /sdcard together, with the phone controlling access)
custom kernels/roms may still include this feature

It can't be done on a FUSE file system
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abmone said:
How do enable this so I can transfer some files on my computer? I only get mtp or some other camera option. I just want it to show up as a normal drive. Is there a different driver to be installed?
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Click to collapse
Via Developer Options and enabling USB Debugging, mine shows up as you say "like a normal drive". To see everything, you'll want to make sure "Media Device (MTP)" is selected. Also make sure you have the drivers for your device installed on your computer.
If that still doesnt work, try using: SG USB Mass Storage Enabler, available for free on the app store (play.google.com)
That worked for me on my Galaxy S4 on the GPE Rom.

paperWastage said:
google removed mass storage mode from android (jellybean(?) and later)
(i think it was b/c mass storage mode does not allow the phone to mount /sdcard while connected to PC.... so apps using /sdcard for storage may become unstable... MTP allows both phone and computer to access /sdcard together, with the phone controlling access)
custom kernels/roms may still include this feature
Click to expand...
Click to collapse
this is just all kinds of wrong.
google didnt remove it, there's just no sdcard slot so there is no mass storage mode. end of discussion.

This is also wrong. The one x had no sdcard slot but still had mass storage mode.
The reason it's gone is because of the fused sdcard partition. It is actually an ext4 partition which cannot be read by windows in mass storage mode.
The reason they did this was firstly better performance and less limitations than fat in android. And that the partition can be dynamically changed so no risk of /data becoming full and not being able to install anymore apps etc..
There are several other reasons but I'm not going into the boring stuff
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Alex240188 said:
The reason it's gone is because of the fused sdcard partition. It is actually an ext4 partition which cannot be read by windows in mass storage mode.
The reason they did this was firstly better performance and less limitations than fat in android.
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Exactly. Windows blows, we all know that.

Alex240188 said:
There are several other reasons but I'm not going into the boring stuff
Sent from my Nexus 4 using xda app-developers app
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I think I pretty much covered the reasons in my n5 data thread in general if anyone wants to read it
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[Q] USB mount on stock

Hello, i want to be able to mount usb storage like CM10, 11 on stock rom and still be able to update OTA.
Is there any MOD around here?

you cannot mount a fused storage system like the nexus has as a USB mass storage.

Zepius said:
you cannot mount a fused storage system like the nexus has as a USB mass storage.
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i meant to mount USB OTG sorry i wasn't specific

Stick mount
Usb otg helper
Media importer
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danydani90 said:
i meant to mount USB OTG sorry i wasn't specific
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Get stickmount by chainfire

jd1639 said:
Get stickmount by chainfire
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i would have prefered a MOD (not as an extra app installed)
but i think this will work thanks

[Q] What's a file explorer that can r/w to OTG USB?

I have the meenova micro SD OTG reader and the only way i can access files from through my phone is from TWRP when i flash roms and such. I want to be able to move files back and forth from my phone using the Meenova but i've only seen peopl;e suggest nexus importer but it doesn't really work for me that well, I'm using root explorer right now and it doesn't let me access my usb otg. Basically i want a file explorer that let's me use the meenova to move files and not have to boot into twrp to have to do it and i dont want to have to pay a fortune for an app that will let me do this.

Hi,
Take a look for these apps: https://play.google.com/store/search?q=stickmount&c=apps&hl=fr.
Apps like Stickmount have a free version, you can test... After that I use Root Explorer without any issue.

viking37 said:
Hi,
Take a look for these apps: https://play.google.com/store/search?q=stickmount&c=apps&hl=fr.
Apps like Stickmount have a free version, you can test... After that I use Root Explorer without any issue.
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Thanks ! Some great results came out
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zolo185 said:
Thanks ! Some great results came out
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Click to collapse
Re,
Yes , for my usage I use Stickmount (the free version). Once the USB is mounted I can move, copy, delete the files. With Root Explorer the path is /sdcard/usbStorage/sda1.

Depends what you want to do. Apps like stickmount are ok if you just want to read/write data on the card through a file explorer. However since these apps dont mount correctly (mount in sdcard for non-root users), they're useless if you want to move game data onto usb otg. Fir that you need it mounting in /storage so custom kernel like chaos is what you'd need
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rootSU said:
Depends what you want to do. Apps like stickmount are ok if you just want to read/write data on the card through a file explorer. However since these apps dont mount correctly (mount in sdcard for non-root users), they're useless if you want to move game data onto usb otg. Fir that you need it mounting in /storage so custom kernel like chaos is what you'd need
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How can I tell if its mounting to storage or not. I'm on purity using stock purity kernel.
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zolo185 said:
How can I tell if its mounting to storage or not. I'm on purity using stock purity kernel.
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Im sorry, I don't understand the question. Does purity say it automounts USB otg in its list of features? Most roms / kernels do not offer this.
I only know 1 kernel and 1 rom that does. Chaos kernel and Mahdi rom. This doesn't mean more don't do it but I don't know the features if every rom or kernel.
Browse to /storage on the root of your device to see what's there
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rootSU said:
Im sorry, I don't understand the question. Does purity say it automounts USB otg in its list of features? Most roms / kernels do not offer this.
I only know 1 kernel and 1 rom that does. Chaos kernel and Mahdi rom. This doesn't mean more don't do it but I don't know the features if every rom or kernel.
Browse to /storage on the root of your device to see what's there
Sent from my Nexus 5 using Tapatalk
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Click to collapse
Sorry, and it does not mention it in the ROM features and I don't have the USB otg with me at the moment I'm in school. But here is what it shows me now.
*note* the SDA 1 is what I just added to see if it would mount there later on as vicking said above.
View attachment 2542308
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The attachment doesn't work.
If you use stickmount, it will mount to /storage/sdcard0/usbStorage/sda1
Chaos kernel mounts to /storage/USBdisk
You don't create anything yourself. It creates as and when required
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[Q] OTG Problem?

Hi guys! Just got a new USB OTG cable and also got stickmount PRO, and i connected my flash drive to my phone and stickmount detected it and i clicked mount and after i was done i clicked unmount and the flash drive got unmounted and so did my sdcard partition and it wouldn't be mounted unless i reboot my device, i've heard of this problem before but never found a solution. Also i'm running the latest version of slimkat and franco kernel, If there's a rom and, or kernel that supports OTG could you point it out for me please cuz i don't want to use stickmount because of this problem. I also tried usb OTG helper and the app crashes when i mount. Please help me and i'm sorry for asking a noob question.

Chaos kernel supports otg. I haven't tried it though.

Chaos is a CAF kernel so you'd have to use an old version on slim.
I use elementalx on slim which also automounts otg via the storage menu.
I still use stickmount too though because elementalx hasn't exported external storage in the correct way yet so can't use foldermount. If you simply want to browse though, elementalx is fine.
I've never had this problem with stickmount. I've never used franco though
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rootSU said:
Chaos is a CAF kernel so you'd have to use an old version on slim.
I use elementalx on slim which also automounts otg via the storage menu.
I still use stickmount too though because elementalx hasn't exported external storage in the correct way yet so can't use foldermount. If you simply want to browse though, elementalx is fine.
I've never had this problem with stickmount. I've never used franco though
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Thanks! I'm gonna flash elementalx and report back, also would you mind telling me what rom you're running just in case it didn't work for me.

gotenks22 said:
Thanks! I'm gonna flash elementalx and report back, also would you mind telling me what rom you're running just in case it didn't work for me.
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Ha ha. Already mentioned it in the 2nd line of my first post
Have another look
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rootSU said:
Ha ha. Already mentioned it in the 2nd line of my first post
Have another look
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LOL I didn't see that. also i flashed elementalx and i'm still getting the same problem:crying:, i unmount and then a popup shows saying that youtube crashed and when i go to es file explorer it's the same problem. Is there another kernel which isn't CAF that natively supports usb otg?

You're unmounting via storage menu and not using stickmount?
No.point looking at kernels. This isn't a kernel problem. This is a you problem. By you, I.don't mean you yourself. Rather, I mean there is a problem with your config. Usbotg works fine with latest slim and elementalx without issue. Must be an app or something.
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rootSU said:
You're unmounting via storage menu and not using stickmount?
No.point looking at kernels. This isn't a kernel problem. This is a you problem. By you, I.don't mean you yourself. Rather, I mean there is a problem with your config. Usbotg works fine with latest slim and elementalx without issue. Must be an app or something.
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Thanks for telling me bout elementalx unmounting and mounting via storage menu works now, but the problem is still there with stickmount, it seems like it's stickmount's problem. You also mentioned that elementalx had a problem with external storage does that mean that i can't use apps like GLtoSD so that i can put my game data in my flash drive?

I only use stickmount because of a setting that's missing that prevents foldermount mounting folders from /sdcard to USB. You don't need to use it simply to browse.
No idea why stickmount causes this problem for you. Works fine for me.
No idea what gltosd is. You'll have to test it yourself
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rootSU said:
I only use stickmount because of a setting that's missing that prevents foldermount mounting folders from /sdcard to USB. You don't need to use it simply to browse.
No idea why stickmount causes this problem for you. Works fine for me.
No idea what gltosd is. You'll have to test it yourself
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GL to SD does the same thing as foldermount except it's a more user-friendly interface made for games

Probably wont work then without stickmount
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rootSU said:
I only use stickmount because of a setting that's missing that prevents foldermount mounting folders from /sdcard to USB. You don't need to use it simply to browse.
No idea why stickmount causes this problem for you. Works fine for me.
No idea what gltosd is. You'll have to test it yourself
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Just found out that the main problem was my explorer (after i unmount with stickmount es file explorer tells me sdcard not found but other explorers show it normally) it wasn't the kernel's problem nor stickmount's. Godammit i feel so stupid *facepalm*. Anyways thanks for helping me, also elementalx is amazing, really good battery life and performance.

Yep good kernel
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