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Thread: Why won't ubuntu recognize my usb flash drive?

  1. #1
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    Unhappy Why won't ubuntu recognize my usb flash drive?

    I've got a transcend 4GB usb drive. But Ubuntu doesn't even recognize it. It shows up on 'Computer' but when I click properties, it doesn't read it at all. I can't even mount it because it shows me an error message.
    I've tried running lsusb and this is what I got:

    Bus 004 Device 005: ID 058f:6387 Alcor Micro Corp. Transcend JetFlash 110 USB 2.0 Flash Drive (2GB)
    Bus 004 Device 001: ID 0000:0000
    Bus 003 Device 001: ID 0000:0000
    Bus 002 Device 001: ID 0000:0000
    Bus 001 Device 003: ID 046d:c00c Logitech, Inc. Optical Wheel Mouse
    Bus 001 Device 001: ID 0000:0000


    Someone please help

  2. #2
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    Re: Why won't ubuntu recognize my usb flash drive?

    plug it in and post the last 10 or so lines of dmesg.

    Has this device recently been plugged into a windows box?

  3. #3
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    Re: Why won't ubuntu recognize my usb flash drive?

    Is this a new drive or have you already used it?
    If it's new you may need to format it.
    You can use gparted (found under system-->admin-->partition editor, install with synaptic etc. if not present) to look at what partitions are on the device if any, and what filesystems they are formatted as.

  4. #4
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    Re: Why won't ubuntu recognize my usb flash drive?

    Do you have any other usb devices plugged in. Can you post the output of
    Code:
    fdisk -l
    (l = lower case L)

    This will give you the last 10 lines of dmesg
    Code:
    tail dmesg
    It is possible it one of those 'silly' usb drives (I can't remember the name), they have a special program that makes windows think it is a cd. This program tends to mess up mounting in GNU/Linux

  5. #5
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    Re: Why won't ubuntu recognize my usb flash drive?

    Quote Originally Posted by tarps87 View Post
    It is possible it one of those 'silly' usb drives (I can't remember the name), they have a special program that makes windows think it is a cd. This program tends to mess up mounting in GNU/Linux
    Yes, I have a SanDisk cruzer micro like that. Even zeroing the thing wouldn't remove it. I had to download their removal app & run it from a windows system to get it to behave as a plain usb stick.

  6. #6
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    Re: Why won't ubuntu recognize my usb flash drive?

    Quote Originally Posted by llamabr View Post
    plug it in and post the last 10 or so lines of dmesg.

    Has this device recently been plugged into a windows box?
    Code:
    [19364.188554] scsi 4:0:0:0: Direct-Access     JetFlash TS4GJFV30        8.07 PQ: 0 ANSI: 2
    [19364.201433] sd 4:0:0:0: [sdc] 8028158 512-byte hardware sectors (4110 MB)
    [19364.202273] sd 4:0:0:0: [sdc] Write Protect is off
    [19364.202280] sd 4:0:0:0: [sdc] Mode Sense: 03 00 00 00
    [19364.202283] sd 4:0:0:0: [sdc] Assuming drive cache: write through
    [19364.207611] sd 4:0:0:0: [sdc] 8028158 512-byte hardware sectors (4110 MB)
    [19364.208218] sd 4:0:0:0: [sdc] Write Protect is off
    [19364.208224] sd 4:0:0:0: [sdc] Mode Sense: 03 00 00 00
    [19364.208227] sd 4:0:0:0: [sdc] Assuming drive cache: write through
    [19364.208237]  sdc: sdc1
    [19364.209259] sd 4:0:0:0: [sdc] Attached SCSI removable disk
    [19364.209327] sd 4:0:0:0: Attached scsi generic sg3 type 0
    Yeah, I've plugged it into a laptop that has Windows Vista recently.

    fdisk -l doesn't return anything.

    No its not a silly device.

    And I couldn't find partition manager?

  7. #7
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    Re: Why won't ubuntu recognize my usb flash drive?

    Quote Originally Posted by iamleaf View Post
    Code:
    [19364.188554] scsi 4:0:0:0: Direct-Access     JetFlash TS4GJFV30        8.07 PQ: 0 ANSI: 2
    [19364.201433] sd 4:0:0:0: [sdc] 8028158 512-byte hardware sectors (4110 MB)
    [19364.202273] sd 4:0:0:0: [sdc] Write Protect is off
    [19364.202280] sd 4:0:0:0: [sdc] Mode Sense: 03 00 00 00
    [19364.202283] sd 4:0:0:0: [sdc] Assuming drive cache: write through
    [19364.207611] sd 4:0:0:0: [sdc] 8028158 512-byte hardware sectors (4110 MB)
    [19364.208218] sd 4:0:0:0: [sdc] Write Protect is off
    [19364.208224] sd 4:0:0:0: [sdc] Mode Sense: 03 00 00 00
    [19364.208227] sd 4:0:0:0: [sdc] Assuming drive cache: write through
    [19364.208237]  sdc: sdc1
    [19364.209259] sd 4:0:0:0: [sdc] Attached SCSI removable disk
    [19364.209327] sd 4:0:0:0: Attached scsi generic sg3 type 0
    Yeah, I've plugged it into a laptop that has Windows Vista recently.

    fdisk -l doesn't return anything.

    No its not a silly device.

    And I couldn't find partition manager?
    That's the silly thing 'U3 Launchpad'

    try
    Code:
    sudo fdisk -l
    without sudo it should have just listed the removable drives.
    You will probably need to install the partitioner, it is called gparted.

    Did you just plug the usb stick in? It appears to have seen it.
    Also how many usb devices have you got connected or to be more precise to you have a 2GB stick plugged in?

    Oh and it must be silly other wise Ubuntu would see it
    Last edited by tarps87; April 17th, 2009 at 05:03 PM.

  8. #8
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    Re: Why won't ubuntu recognize my usb flash drive?

    Or you can try to mount it from a terminal with

    Code:
    sudo mkdir /media/sdc1
    sudo mount -t vfat /dev/sdc1 /media/sdc1 -o umask=000
    df -h
    In the world of Linux, who needs Windows and Gates...

    Got most of my golden beans at an auction on eBay (with a couple of free drinks).

  9. #9
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    Re: Why won't ubuntu recognize my usb flash drive?

    Okay I got it to start working. I just formatted the thing from a Windows platform. I've tried using transferring data between ubuntu and windows and it works. I think the laptop that I used was infected or something. It had two folders which I just couldn't delete that kept popping up: 'New Folder' and 'regvsr'

    Thing is, I'll have to keep formatting it if I want to exchange data between this ubuntu and other windows platforms.

  10. #10
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    Re: Why won't ubuntu recognize my usb flash drive?

    If a drive is not cleanly unmounted in either OS and then inserted into the other OS it will not be recognized properly

    You have to always stop drives before removing them even usb sticks otherwise you can loose data

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