[HOWTO] mount EMMC and External SD on CM7 as it is on Stock ROMs

talmeida · Mar 14, 2012

Hello Everyone.
In this post, I would like to show how to mount Internal SD card and External SD card when using Cyanogenmod 7 ROM.
I had some issues because CM7 mounts the internal SD card under /mnt/emmc and mounts external SD card under /mnt/sdcard.
As you know, there are many applications that download data using /mnt/sdcard as path and if you have CM7 way of mounting these apps won't work.

So to mount Internal SD card to /mnt/sdcard and External SD card to /mnt/sdcard/external_sd as it is done on Stock ROMs proceed with the following:

1 - Open the file /etc/vold.fstab with your preferred text editor (I use root Explorer) and find and modify the last lines as below an then save:

# internal sdcard
dev_mount emmc /mnt/sdcard 28 /devices/platform/msm_sdcc.1/mmc_host/mmc0/mmc0

# external sdcard
dev_mount sdcard /mnt/sdcard/external_sd auto /devices/platform/msm_sdcc.3/mmc_host/mmc2/mmc2

# otg sdcard
usb_mount sdcard2 /mnt/sdcard/usbStorage auto /devices/platform/msm_hsusb_host.0

#end line

2 - Open the file /system/build.prop with your preferred text editor and find and modify the following lines as it is show an then save:

# notify vold we have internal and external sd
ro.additionalmounts=/mnt/sdcard/external_sd
ro.vold.switchablepair=/mnt/sdcard/external_sd,/mnt/sdcard

3 - Reboot the phone and voilá

This procedure worked for me and I have no issues to mount both my Internal and External SD cards when plugging the phone on my laptop.

AllGamer · Mar 14, 2012

a good guide indeed for the CM7 ROM users

I did something similar for all my Gameloft games, EA games, Glu games, and DATA partition, and Download, and all the other stuff, basically i mounted everything off to my 64 GB SD card instead of internal SD

lets give this topic some flight time, stuck for a month, it'll come off by itself
also added to main INDEX

talmeida · Mar 14, 2012

Thanks AllGamer...

liderbravin · Mar 15, 2012

thanks, i was looking for something like this for a while.

simple23227 · Mar 16, 2012

Thanks so much for this. Thanks a bunch!!!

talmeida · Mar 16, 2012

ICS

Can someone who had flashed ICS Alpha builds tell us if this procedure works on them?
Thanks and I am glad I'd helped someone by doing this post

jomeister15 · Mar 20, 2012

Testing this out right now on Isotope, let's all keep our fingers crossed.

ngu · Mar 21, 2012

talmeida said:
Hello Everyone.
In this post, I would like to show how to mount Internal SD card and External SD card when using Cyanogenmod 7 ROM.
I had some issues because CM7 mounts the internal SD card under /mnt/emmc and mounts external SD card under /mnt/sdcard.
As you know, there are many applications that download data using /mnt/sdcard as path and if you have CM7 way of mounting these apps won't work.

So to mount Internal SD card to /mnt/sdcard and External SD card to /mnt/sdcard/external_sd as it is done on Stock ROMs proceed with the following:

1 - Open the file /etc/vold.fstab with your preferred text editor (I use root Explorer) and find and modify the last lines as below an then save:

# internal sdcard
dev_mount emmc /mnt/sdcard 28 /devices/platform/msm_sdcc.1/mmc_host/mmc0/mmc0

# external sdcard
dev_mount sdcard /mnt/sdcard/external_sd auto /devices/platform/msm_sdcc.3/mmc_host/mmc2/mmc2

# otg sdcard
usb_mount sdcard2 /mnt/sdcard/usbStorage auto /devices/platform/msm_hsusb_host.0

#end line

2 - Open the file /system/build.prop with your preferred text editor and find and modify the following lines as it is show an then save:

# notify vold we have internal and external sd
ro.additionalmounts=/mnt/sdcard/external_sd
ro.vold.switchablepair=/mnt/sdcard/external_sd,/mnt/sdcard

3 - Reboot the phone and voilá

This procedure worked for me and I have no issues to mount both my Internal and External SD cards when plugging the phone on my laptop.

does it work for other devices cm7 roms??

drzplaya1121 · Mar 21, 2012

tried it and didn't work for me. Might have typed it wrong. Will try again.

I only used the file browser to see if i can access both the emmc and the sd card but could only get to the emmc

multipol · Apr 4, 2012

I will try...

sarcigon · Apr 24, 2012

talmeida said:
Hello Everyone.
In this post, I would like to show how to mount Internal SD card and External SD card when using Cyanogenmod 7 ROM.
I had some issues because CM7 mounts the internal SD card under /mnt/emmc and mounts external SD card under /mnt/sdcard.
As you know, there are many applications that download data using /mnt/sdcard as path and if you have CM7 way of mounting these apps won't work.

So to mount Internal SD card to /mnt/sdcard and External SD card to /mnt/sdcard/external_sd as it is done on Stock ROMs proceed with the following:

1 - Open the file /etc/vold.fstab with your preferred text editor (I use root Explorer) and find and modify the last lines as below an then save:

# internal sdcard
dev_mount emmc /mnt/sdcard 28 /devices/platform/msm_sdcc.1/mmc_host/mmc0/mmc0

# external sdcard
dev_mount sdcard /mnt/sdcard/external_sd auto /devices/platform/msm_sdcc.3/mmc_host/mmc2/mmc2

# otg sdcard
usb_mount sdcard2 /mnt/sdcard/usbStorage auto /devices/platform/msm_hsusb_host.0

#end line

2 - Open the file /system/build.prop with your preferred text editor and find and modify the following lines as it is show an then save:

# notify vold we have internal and external sd
ro.additionalmounts=/mnt/sdcard/external_sd
ro.vold.switchablepair=/mnt/sdcard/external_sd,/mnt/sdcard

3 - Reboot the phone and voilá

This procedure worked for me and I have no issues to mount both my Internal and External SD cards when plugging the phone on my laptop.

Oh man, thank you!

This worked like a charm on my Epic Touch 4G.

toinktoink · Apr 26, 2012

tried this in a aokp rom(hydrogen), and it doesn't work.

jago25_98 · May 10, 2012

Why not mount the emmc to /mnt/sdcard/external_sd in addition to /mnt/eemc for backward compatibility?

z-vet · Jun 24, 2012

Does it work on CM9 too?

SmirkingSheep · Jun 24, 2012

I had ICS Passion v13 installed on my Samsung Vibrant before, and my vold.fstab file is a bit different from cm7's. I now have cm7 installed but the vold.fstab file doesn't seem to have changed with the change of roms.

It would be great if you could post the fstab and build.prop files somewhere online from where I can download it and replace in my phone because I don't want to mess up again(I encountered the "encryption failed" bug in ICS today and I tore my hair out fixing that..so yeah.)

Thank you.

fresherthanU · Jun 25, 2012

Anyone else that's on AOKP have any luck getting this to work??? The flip-flooped SD cards on CM9/AOKP is seriously annoying..

Sent from my AOKP'd T989

SmirkingSheep · Jun 25, 2012

This is the vold.fstab file in my Samsung Vibrant:

## Vold 2.0 Generic fstab
## - San Mehat (san@android.com)
##

#######################
## Regular device mount
##
## Format: dev_mount <label> <mount_point> <part> <sysfs_path1...>
## label - Label for the volume
## mount_point - Where the volume will be mounted
## part - Partition # (1 based), or 'auto' for first usable partition.
## <sysfs_path> - List of sysfs paths to source devices
######################

# internal sdcard
dev_mount emmc /mnt/emmc 1 /devices/platform/s3c-sdhci.0/mmc_host/mmc0

# external sdcard
dev_mount sdcard /mnt/sdcard auto /devices/platform/s3c-sdhci.2/mmc_host/mmc2

As you can see, it is differs from the one you posted in the guide. What steps should I take now?

Bitterdulce · Jul 5, 2012

Can anyone show me how to do this with captivate cm7?
Please and thanks!

SlasheI2 · Jul 6, 2012

fresherthanU said:
Anyone else that's on AOKP have any luck getting this to work??? The flip-flooped SD cards on CM9/AOKP is seriously annoying..

Sent from my AOKP'd T989

has anyone found a solution for AOKP yet? I find that many of my apps such as google music and my camera don't save files properly. This has caused me to switch back to juggernaut.

major thanks to anyone who can help!

[HOWTO] mount EMMC and External SD on CM7 as it is on Stock ROMs

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