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Plugging my blackberry into a usb port of a generic ubuntu machine shows it's microsd card as something I can mount and everything works. Here's what happens when I try to do the same thing in raspbian:

raspberrypi$ find /dev > /tmp/without_bb
raspberrypi$ find /dev > /tmp/with_bb   
raspberrypi$ diff /tmp/without_bb /tmp/with_bb 
> /dev/sda
> /dev/usbdev1.14
> /dev/disk/by-path
> /dev/disk/by-path/platform-bcm2708_usb-usb-0:
> /dev/disk/by-id/usb-RIM_Blackberry_SD_EB38692999EF1D8A3FD3AB10ED202905678036E1-0:0
> /dev/block/8:0
> /dev/char/189:13
> /dev/bus/usb/001/014
raspberrypi$ sudo mount -t vfat /dev/sda /media/blackberry 
mount: no medium found on /dev/sda
raspberrypi$ file /dev/sda
/dev/sda: sticky block special
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closed as off-topic by goldilocks Jan 10 '15 at 15:33

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question does not appear to be specific to the Raspberry Pi within the scope defined in the help center." – goldilocks
If this question can be reworded to fit the rules in the help center, please edit the question.

BlackBerry's charge via USB right? I expect it is trying to draw too much power from the Pi and that is having adverse effects. When I plug my Android phone in the connection drops frequently, almost every 5 seconds. – Jivings Feb 17 '13 at 19:05
what do you get as an output if you run fdisk -l? It looks like you are trying to mount the entire disk rather than an actual partition like sda1. – user6080 Feb 19 '13 at 13:02