Cannot see my SD card in parted

When I plug in my card reader, it shows up at /def/sdf, and when I insert this SD card I also see /dev/sdf1, but parted won't show the disk. It doesn't have any information I need, I just want to use the card. Why doesn't it show up in parted? EDIT (more details):

• I'm on Ubuntu 14.04
• sudo parted -l will not list my SD card
• After plugging the SD reader: $ ls /dev/sd* /dev/sda /dev/sda1 /dev/sda2 /dev/sda5 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdf1 $ sudo file -s /dev/sdf /dev/sdf: writable, no read permission $ sudo fdisk /dev/sdf fdisk: unable to open /dev/sdf: No medium found