I'm working on a customized built embedded system board. We are having some problem to mount a USB stick. I wonder, general terms, what might be wrong.
So. The USB device (stick) is recognized by the kernel. If I do cat /proc/bus/devices/usb I get the information about the stick like this:
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T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=125f ProdID=c82a Rev=11.00
S: Product=ADATA USB Flash Drive
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=31875us
I understand that this is as expected.
However, if I run fdisk -l it is not shown there. So, it seems that the kernel detects the stick but it is not possible to mount it. Manually or otherwise.
We are running a 3.2 kernel and busybox.
I understand that this might be tough one to answer but does anyone have any general ideas of what must be fullfilled to make it possible to mount this device?