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On Fri, Feb 4, 2011 at 8:48 AM, Helmut Jarausch |
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<jarausch@××××××××××××××××.de> wrote: |
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> On 02/02/2011 04:48:40 PM, Paul Hartman wrote: |
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>> On Mon, Jan 31, 2011 at 3:43 AM, Helmut Jarausch |
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>> <jarausch@××××××××××××××××.de> wrote: |
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>> > Hi, |
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>> > |
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>> > since a few weeks I have a strange effect with my USB stick. |
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>> > |
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>> > According to fdisk there is one partition on it |
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>> > /dev/sde1 38 7839719 3919841 b W95 FAT32 |
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>> > |
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>> > which I haven't changed for a long time. |
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>> > |
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>> > Whenever I insert this stick, the kernel log shows |
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>> > /dev/sde but not /dev/sde1 (and there is no file /dev/sde1) |
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>> > |
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>> > After Invoking fdisk /dev/sde with a simple 'p' command but nothing |
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>> > else, this device shows up. |
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>> > |
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>> > Has anybody an idea what's going on here? |
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>> |
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>> I have a USB SD-card reader which cannot read the partition table |
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>> when |
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>> first inserted into the PC. But, if I issue "hdparm -z /dev/sdg" then |
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>> the kernel re-reads the partition table and everything works fine |
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>> after that. You can try it, maybe it'll work for you, too. |
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> |
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> Thanks Paul and all other who tried to help. |
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> Sorry for my late reply, I have been too busy. |
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> |
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> My situation seems special. |
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> |
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> - the card reader is 2 years old (builtin) |
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> - the stick is about 1 year old |
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> |
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> 2 of my 3 USB stick work just fine |
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> |
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> up to kernel 2.6.36-? the stick in question |
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> has worked definitely. |
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> Probably since kernel 2.6.37 this one shows the mentioned problems. |
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> |
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> Paul's advice above works just fine! |
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> So, I think it's a timing problem as Paul has suggested in a later |
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> mail. Where can I set the delay_use option of usb-storage to a higher |
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> value? |
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|
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I think you must first ensure usb-storage is built as a module, then |
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create a file /etc/modprobe.d/usb_storage with these contents: |
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|
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options usb_storage delay_use=5 |
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|
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That would set the delay to 5 seconds. And you may need to run |
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update-modules after changing that file. |
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|
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I haven't tried it yet and that's based on my memory as I'm using a |
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Windows computer at the moment... Good luck! |
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