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Thread: Confusion trying to mount USB Stick

  1. #21
    Join Date
    Mar 2007
    Location
    Linz, Austria
    Beans
    83
    Distro
    Kubuntu

    Re: Confusion trying to mount USB Stick

    very nice to see that just recently someone else had the very same problem I'm experiencing right now... My stick's not recognised either. Funny thing, it used to be, and 2 other sticks are recognised without problems. It's an 8g stick and I put a lot of files (two versions of MS office directory trees, >1g in total) on it. Still windows recognises it no problem.
    dmesg isn't any different from working sticks...

    output of dmesg:
    [10006.808205] usb 2-2: new high speed USB device using ehci_hcd and address 10
    [10006.944327] usb 2-2: configuration #1 chosen from 1 choice
    [10006.949144] scsi11 : SCSI emulation for USB Mass Storage devices
    [10006.949632] usb-storage: device found at 10
    [10006.949637] usb-storage: waiting for device to settle before scanning
    [10011.949288] usb-storage: device scan complete
    [10011.950010] scsi 11:0:0:0: Direct-Access JetFlash TS8GJFV35 8.07 PQ: 0 ANSI: 2
    [10011.951740] sd 11:0:0:0: [sdb] 15974400 512-byte hardware sectors: (8.17 GB/7.61 GiB)
    [10011.952233] sd 11:0:0:0: [sdb] Write Protect is off
    [10011.952236] sd 11:0:0:0: [sdb] Mode Sense: 03 00 00 00
    [10011.952239] sd 11:0:0:0: [sdb] Assuming drive cache: write through
    [10012.006602] sd 11:0:0:0: [sdb] 15974400 512-byte hardware sectors: (8.17 GB/7.61 GiB)
    [10012.007096] sd 11:0:0:0: [sdb] Write Protect is off
    [10012.007099] sd 11:0:0:0: [sdb] Mode Sense: 03 00 00 00
    [10012.007103] sd 11:0:0:0: [sdb] Assuming drive cache: write through
    [10012.007109] sdb: sdb1
    [10012.093183] sd 11:0:0:0: [sdb] Attached SCSI removable disk
    [10012.093275] sd 11:0:0:0: Attached scsi generic sg2 type 0

    output of fdisk -l:
    martin@martin-laptop:~$ sudo fdisk -l

    Platte /dev/sda: 320.0 GByte, 320072933376 Byte
    255 Köpfe, 63 Sektoren/Spuren, 38913 Zylinder
    Einheiten = Zylinder von 16065 × 512 = 8225280 Bytes
    Disk identifier: 0xd8000000

    Gerät boot. Anfang Ende Blöcke Id System
    /dev/sda1 * 1 37782 303483883+ 83 Linux
    /dev/sda2 37783 38913 9084757+ 5 Erweiterte
    /dev/sda5 37783 38913 9084726 82 Linux Swap / Solaris

    Platte /dev/sdb: 8178 MByte, 8178892800 Byte
    252 Köpfe, 62 Sektoren/Spuren, 1022 Zylinder
    Einheiten = Zylinder von 15624 × 512 = 7999488 Bytes
    Disk identifier: 0xffffffff

    Festplatte /dev/sdb enthält keine gültige Partitionstabelle

    funny, isn't it? Windows has no problem with the stick
    Last edited by AlmaTlust; July 9th, 2009 at 04:30 PM. Reason: adding output of fdisk -l

  2. #22
    Join Date
    Jul 2009
    Beans
    1
    Distro
    Ubuntu 9.04 Jaunty Jackalope

    Re: Confusion trying to mount USB Stick

    Hi guys,

    I struggled with this problem on my laptop running 9.04. I searched high and low for a solution and managed to find few good explainations. It seems that USB devices have a 2 ways they can get spoken to:

    1. old way (usb 1.1 devices): device is queried 8 bytes, then 16 bytes, then 32 bytes and 64 bytes until the device descriptor is discovered.
    2. new way (hi-speed devices): qurey 64 bytes.

    Unfortunantly some devices only allow old or new (some both). If the device is not queried in the right way, then it results in the error you are seeing.

    The solution that worked for me:
    Code:
    sudo vi /etc/modprobe.d/options.conf
    
    #add this line
    options usbcore use_both_schemes=y


    This forces the usb_code module to try both. Once I added this, my HDD was detected normally.

  3. #23
    Join Date
    Mar 2005
    Beans
    1,389

    Re: Confusion trying to mount USB Stick

    having this same trouble with a wubi install of ubuntu 9.04

    the usb mouse works great but usb sticks (512mb and 4gb) are just left flashing and do not mount.

    Machine is
    ibm thinkpad type 1871
    model 23737 cg

    however
    when the machine is run from the same 9.04 cd live cd then the 512mb usb stick was recognised normally once, then after that, neither the 512mb nor the 4gb were recognised, the lights just kept flashing

    any ideas please?
    tia



    afterthought:
    I used sudo gedit to do this:

    sudo vi /etc/modprobe.d/options.conf
    #add this line
    options usbcore use_both_schemes=y

    the file did not seem to exist so I created it (I think)
    and restarted, however the problem remained unchanged
    Last edited by candtalan; September 21st, 2009 at 04:40 PM. Reason: further information

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