LinuxQuestions.org - USB multi-card reader; only one card can be mounted in Slack 10.

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USB multi-card reader; only one card can be mounted in Slack 10.

I have a Lead Data USB multi-card reader. I finally got Slack to see it and allow the CF card to be mounted, but it won't allow me to mount the little HP card that our digital camera uses. I haven't seen any threads on mounting issues with multiple card readers, but maybe I missed something...

Anyone have any ideas?

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.

Quote:

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.

I figured it out...

I had to recompile my kernel with the "Probe all LUN's on each SCSI device" option enabled. After doing so and then copying my new kernel to my boot directory and rebooting, it found all five card slots in the reader with no problems and I was able to mount each of them easily by simply editing the fstab file.

Congrats on successfully resolving the problem and posting back with the solution. That will be a huge help to future readers. -- J.W.

Welcome to LQ!

Interesting solution - I learned something:)