The first time you plug in the thumb drive it should be /dev/sda. If you
want the SD card its /dev/mmcXXblk where XX is either 00 or 01 depending on
what you booted from. The part of my script that unmounts drives is
unneeded for SD cards, but you still need to run modprobe -r g_multi to
unload the default device which doesn't export the SD card. Then if you
run modprobe g_multi file=/dev/mmcXXblkXX it should show up on the PC.
On Sun, Jul 12, 2015, 11:55 AM Jim Lill <jlill...@gmail.com> wrote:
>
> Tried the suggestion below, no working. Perhaps path is /dev/etcetera not
> mounted drive?
>
>
> On Friday, July 10, 2015 at 12:45:10 PM UTC-4, William Hermans wrote:
>
>> wow Phil, way to over complicate g_multi heh.
>>
>> nano /etc/modules -> add 'g_multi file=/path/to/sdcard'
>>
>> No quotes.
>>
>> The above is persistent, and by its self requires a system restart in
>> order to become 'active' However you can also use modprobe to load the
>> module without a restart. Using the exact same parameters. Like this:
>>
>> $ sudo modprobe g_multi file=/path/to/sdcard
>>
>> So for the inexperienced. g_multi will load all three USB gadget drivers.
>> Equivalents to g_mass_storage, g_ether, and g_serial. In order to use the
>> other gadgets, they must be configured. Also, for what it is worth, only
>> one gadget driver can be loaded / used at a time. Hence the need for
>> g_multi.
>>
>> On Fri, Jul 10, 2015 at 6:44 AM, Philip Polstra <ppol...@gmail.com>
>> wrote:
>>
> You want to use the USB gadget to export the SD Card filesystem. This is
>>> similar to something I'm doing for an upcoming DEFCON talk. Here is the
>>> script for that talk:
>>>
>>> #!/bin/bash
>>> # stop the GETTY service if needed
>>> if which 'systemctl' ; then
>>> systemctl stop serial-getty@ttyGS0.service >/dev/null
>>> fi
>>> # unload current composite gadget
>>> modprobe -r g_multi
>>> # these variables are used to export all partitions
>>> fstr=""
>>> rostr=""
>>> # unmount the USB drive
>>> for d in $(ls /dev/sd*) ; do
>>> if echo "$d" | egrep '[1-9]$' >/dev/null ; then
>>> umount $d
>>> fstr+=",$d"
>>> rostr+=",1"
>>> fi
>>> done
>>> fstr=${fstr:1} # strip leading comma
>>> rostr=${rostr:1} # strip leading comma
>>> echo "$fstr" >/tmp/usbexports # save for later r/w export
>>>
>>> # now export it
>>> vend=$(( 0x1337 )) # pick your favorite vid/pid
>>> prod=$(( 0x1337 ))
>>> echo "$vend" >/tmp/usbvend # save vid/pid for r/w export
>>> echo "$prod" >/tmp/usbprod
>>> modprobe g_multi file=$fstr cdrom=0 stall=0 ro=$rostr \
>>> removable=1 nofua=1 idVendor=$vend idProduct=$prod
>>>
>> On Fri, Jul 10, 2015 at 9:26 AM <jlil...@gmail.com> wrote:
>>>
>> I have a new BBB with Debian. I want the SD Card to appear on the USB
>>>> port (to Host) rather than the internal memory. I find references to
>>>> uDev.txt and modifying other files related to boot but it seems like it;s
>>>> more for the pre Debain stuff. I have the card formatted and when I ssh
>>>> in, I can see it mounted in /media so I am that far. I put a iDev.txt on
>>>> that card. What else do I change?
>>>>
>>>> Thanks
>>>>
>>>> -Jim
>>>>
>>>> --
>>>> For more options, visit http://beagleboard.org/discuss
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