access media on multireader
      UEVENT[1173395299.173293] remove@/devices/pci0000:00/0000:00:1e.0/0000:0a:09.2/tifm_sd0:1
      UDEV  [1173395299.174213] remove@/devices/pci0000:00/0000:00:1e.0/0000:0a:09.2/tifm_sd0:1
      UEVENT[1173395303.584170] add@/devices/pci0000:00/0000:00:1e.0/0000:0a:09.2/tifm_sd0:1
      UDEV  [1173395303.585243] add@/devices/pci0000:00/0000:00:1e.0/0000:0a:09.2/tifm_sd0:1
      docs:
        /usr/share/doc/udev/writing_udev_rules/index.html
        http://gentoo-wiki.com/HOWTO_SD_and_MMC_card_readers
        http://gentoo-wiki.com/HOWTO_Multicard_reader
      need driver v0.8 http://developer.berlios.de/projects/tifmxx/
      need module: tifm_sd