Originally posted by fphillips
If you mean you're trying to mount a CF card and a (SD card?) on the same usb port, I'm not sure, but I doubt if that is possible. I don't think multi-card readers are meant to be used in that way.
If you mean the CF card is in the reader on one port and the camera is connected to another usb port, then you may just be doing something wrong. Do a 'tail -f /var/log/messages' and plug in the camera's card to usb. It should tell you that it's been assigned /dev/sda1,sdb1,etc. Whichever is plugged in first _generally_ gets sda and the next gets sdb.
This is a multiple format reader: http://www.digital-cameras.com/Card_...orts-2113.html
It has slots for Compact Flash type I/II (including Microdrives), SmartMedia, SD, and MMC cards. Also has a 2-port USB hub.
When I was using Windows, each card would simply show up as a different drive letter. I could plug both my Compact Flash cards (which my old Polaroid PDC 700 uses, and I also use to back up and transport my documents) and the SD card that our HP camera uses and they would simply show up in Windows as two drive letters. Now, in Linux, I can only seem to mount the Compact Flash card and not the SD card, even if I remove the Compact Flash card and leave the SD card in by itself.