How to mount USB storage auto on beagleboard-xm

Hi Yabin,

dev_mount sdcard <mount location> <partition number> <mmc entry><br>

e.g. For data created at partition#3, one need to put following entry in /etc/vold.fstab<br>
dev_mount sdcard /mnt/sdcard 3 /devices/platform/mmci-omap-hs.0/mmc_host/mmc0

Hi Satish Patel

That command is mount mmc SD card. So throught the command has existed in the vold.conf, when I plug in my USB storage, I can't find the usb storage data in /mnt/sdcard .

I think the sysfs path /devices/platform/mmci-omap-hs.0/mmc_host/mmc0 is not my usb storage sysfs path. So I need find the right usb storage sysfs path.

Thanks,

Yanbin Yue

Do remember that if you modify vold.fstab to point to USB storage, you will not be able to use the SD card for data storage except by manually mounting it, just like you may be doing currently for USB storage.

Hi Vishveshwar Bhat,

I think it's OK, we have only USB solt,  so we don't use SD Card.

Will the SD cdard which contained rootfs be recognized as vold SD card too?

Now what we want to do is that we can use the USB solt which supported by beagleboard-xm  to use USB storage.

Thanks.

Yanbin Yue

yanbin yue said:

Hi Vishveshwar Bhat,

I think it's OK, we have only USB solt,  so we don't use SD Card.

Will the SD cdard which contained rootfs be recognized as vold SD card too?

 

Now what we want to do is that we can use the USB solt which supported by beagleboard-xm  to use USB storage.

 

Thanks.

Yanbin Yue

vold.fstab supports only one entry, so you can use either SD card or USB but not both.

As you want to use USB for data storage, you will need to modify vold.fstab to give the correct sysfs path for USB storage device. Unfortunately, I dont have a setup handy so I am not in a position to tell you what entry to make to point vold to USB.

You can continue using SD card for the main android rootfs, it will not be detected by vold if you have modified it to use USB.

Hi Vishveshwar Bhat,

It's enough for me to only use USB storage. Could you help me to find what the correct sysfs path for USB?

I think there must be someone know how  to setup it in TI.

Thans a lot.

Yanbin Yue

Hi Yanbin,

This is the sysfs entry you can add for usb deveice inserted at EHCI port

/devices/platform/ehci-omap.0/usb1/1-2/1-2:1.0/host0

But there is another generic entry present in /sys/block as well.

Not remembering exactly.

Regards,

Arun

Hi Arun,

The file list in the /devices/platform/ehci-omap.0/usb1/1-2/1-2:1.0/ of my system as following:

--------------------------

# cd /sys/devices/platform/ehci-omap.0/usb1/1-2/1-2:1.0/
# ls
uevent
bInterfaceNumber
bAlternateSetting
bNumEndpoints
bInterfaceClass
bInterfaceSubClass
bInterfaceProtocol
modalias
supports_autosuspend
subsystem
power
driver
ep_81

------------------------

I can't find the file host0. Need I to do additional works for let the host0  present? When I plug in the USB, the file list will not change.

Thanks,

Yanbin Yue

Hi Yanbin,

Can you try inserting to different EHCI ports of the board?

Can you check whether any entry is created inside /sys/block ?

Regards,

Arun

Hi Arun,

I tested the four EHCI port, the host0 file/path doen't reprent.

I could see a node sda present in /sys/block.

So that means I shoud use /sys/block/sda as the sysfs path? If this is right, there is another problem, the node sda may be sdb, sdc....or  should the sysfs path be /sys/block ?

Thanks,

Yanbin Yue

Hi Pankaj

It's very pleasure that you give me the right USB syspath. And we can mount both devices. But there is another problem. When we removed the USB we got  some words which likes "SD Card unmounted or not present" prompted on the SDCARD folder. We ues ES file Explorer to view files in the system.

Could you help me how can I remove the prompt words?

Thanks,

Yanbin Yue

Hi Yanbin,

Good to hear  that you can able to mount both USB  and SD card. I am not very sure why  "SD Card unmounted or not present"  is coming after removing the USB stick.

Can you please try to un mount the USB stick  using command line "unmount /mnt/usb-host" and than check the SD card.

Regards,

Pankaj Pandey

Hi Pankaj,

    If i want to use two USB sticks (pendrives) or may increase no.of USB sticks dynamically ,Then how can we give  Lable name in dev_mont command in vold.fstab for all USB sticks dynamically.

 Can we auto mount 2 or more USB sticks (Pendrives) in android Jellybean using vold.fstab?