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Thread: Probe ALL LUNs

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  1. #1
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    Probe ALL LUNs

    I am trying to get my SanDisk 2in1 card reader to work. From what I understand the Smartmedia slot ( the one I need) is on LUN 1. Is there a way to enable that additional LUN? I have asked on the Knoppiz mailing list if "Probe Additional LUNs" was selected in the latest versions kernel but got no reply. Any help would be appreciated.

  2. #2
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    For sure you can do it by selecting "probe multiple LUN's on each device" when configureing a custom kernel. I have also heard of people using various boot params, but I've not had any success that way.

  3. #3
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    You could try something like this for example:

    echo "scsi-add-single-device 1 0 0 1" >
    /proc/scsi/scsi

    That might get your card reader into the /proc filesystem.

    BTW-
    Have a look at /usr/src/linux/.config and you'll see this:

    Code:
    CONFIG_SCSI_MULTI_LUN is not set
    VeeDubb is right- you'd need to recompile the kernel. I don't know why it's not set.

  4. #4
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    Quote Originally Posted by rickenbacherus
    You could try something like this for example:

    echo "scsi-add-single-device 1 0 0 1" >
    /proc/scsi/scsi

    That might get your card reader into the /proc filesystem.

    BTW-
    Have a look at /usr/src/linux/.config and you'll see this:

    Code:
    CONFIG_SCSI_MULTI_LUN is not set
    VeeDubb is right- you'd need to recompile the kernel. I don't know why it's not set.
    According to Klaus, on the mailing list, it's not set because then there would be 7 erroneous SCSI drives on the desktop.

  5. #5
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    Did anyone get this to work? I have a 6in1 USB card reader but only the slot with LUN 0 is recognized.

  6. #6
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    I have not tried it with Knoppix, but it has worked with both RedHat 9 and Mandrake 9.1

    in /etc/modules.conf add the line

    options scsi_mod max_scsi_luns=12

    The only way I know of doing this with Knoppix is with a remaster.

  7. #7
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    Forgot

    I forgot that /etc/modules.conf is not to be edited. It is built by the stuff in /etc/modutils

    I would add it to the end of /etc/modutils/aliases

    # support for SansDisk 5-in-1 reader
    options scsi_mod max_scsi_luns=12

  8. #8
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    Re: Forgot

    Quote Originally Posted by Breetai
    I forgot that /etc/modules.conf is not to be edited. It is built by the stuff in /etc/modutils

    I would add it to the end of /etc/modutils/aliases

    # support for SansDisk 5-in-1 reader
    options scsi_mod max_scsi_luns=12
    And then run update-modules as root for the changes to take effect on the next reload of the module.

  9. #9
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    Thanks for the quick reply. Still I can only use one out of four slots of my USB card reader. How can I check whether all LUNs are activated?

    cat /proc/scsi/scsi
    Code:
    Attached devices:
    Host: scsi0 Channel: 00 Id: 00 Lun: 00
      Vendor: SONY     Model: CD-RW  CRX140E   Rev: 1.0n
      Type:   CD-ROM                           ANSI SCSI revision: 02
    Host: scsi1 Channel: 00 Id: 00 Lun: 00
      Vendor: IC       Model: USB Storage-CFC  Rev: 301b
      Type:   Direct-Access                    ANSI SCSI revision: 02
    Host: scsi1 Channel: 00 Id: 00 Lun: 01
      Vendor: IC       Model: USB Storage-SMC  Rev: 301b
      Type:   Direct-Access                    ANSI SCSI revision: 02
    Host: scsi1 Channel: 00 Id: 00 Lun: 02
      Vendor: IC       Model: USB Storage-MMC  Rev: 301b
      Type:   Direct-Access                    ANSI SCSI revision: 02
    Host: scsi1 Channel: 00 Id: 00 Lun: 03
      Vendor: IC       Model: USB Storage-MSC  Rev: 301b
      Type:   Direct-Access                    ANSI SCSI revision: 0
    So far, it looks just as before.
    But:
    scsi_info /dev/sdc
    Code:
    SCSI_ID="0,0,2"
    MODEL="IC USB Storage-MMC"
    FW_REV="301b"
    That last thing wasn't there before your hint. But still I cannot mount the MMC card:
    Code:
    mount /dev/sdc1 /mnt/test
    mount: /dev/sdc1 is not a valid block device

  10. #10
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    I would try

    Code:
    mount /dev/sdc3 /mnt/test
    The reason being, is I suspect the following is true:

    /dev/sdc1 CFC
    /dev/sdc2 SMC
    /dev/sdc3 MMC
    /dev/sdc4 MSC

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