Is there a bug in FAT32 filesystem support? - Linux

This is a discussion on Is there a bug in FAT32 filesystem support? - Linux ; This happens with FC4/FC5 and the latest 2.6.17 kernels, but has been happening for quite some time with earlier kernels too. I have a 4GB USB disk drive. Sometimes when I am writing or deleting files under Linux it will ...

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Thread: Is there a bug in FAT32 filesystem support?

  1. Is there a bug in FAT32 filesystem support?

    This happens with FC4/FC5 and the latest 2.6.17 kernels, but has been
    happening for quite some time with earlier kernels too.

    I have a 4GB USB disk drive. Sometimes when I am writing or deleting
    files under Linux it will suddenly say the drive is read-only. Eventually
    it will get fairly screwed up and I will have to reformat it (using
    Windows ME or Windows 2000).

    Wondering if this is a known bug, or if I am doing something wrong?
    --

    jhhaynes at earthlink dot net


  2. Re: Is there a bug in FAT32 filesystem support?


    Jim Haynes wrote:
    > This happens with FC4/FC5 and the latest 2.6.17 kernels, but has been
    > happening for quite some time with earlier kernels too.
    >
    > I have a 4GB USB disk drive. Sometimes when I am writing or deleting
    > files under Linux it will suddenly say the drive is read-only. Eventually
    > it will get fairly screwed up and I will have to reformat it (using
    > Windows ME or Windows 2000).
    >
    > Wondering if this is a known bug, or if I am doing something wrong?


    This sounds like a known bug involving power management. Is the disk
    drive plugged into a powered hub? Do you have the problem if the drive
    is the only device connected to that controller?

    DS


  3. Re: Is there a bug in FAT32 filesystem support?

    In article <1152354542.422599.123580@s13g2000cwa.googlegroups. com>,
    wrote:
    >
    >This sounds like a known bug involving power management. Is the disk
    >drive plugged into a powered hub? Do you have the problem if the drive
    >is the only device connected to that controller?
    >

    The disk gets its power through the USB socket - it has no power supply
    of its own, if that's what you mean. I think it's the only device
    connected to the USB socket at the time.

    Seems like I remember times when plugging the disk into my laptop made
    it go down, as if it had momentarily drawn too much power.
    --

    jhhaynes at earthlink dot net


  4. Re: Is there a bug in FAT32 filesystem support?


    Jim Haynes wrote:

    > In article <1152354542.422599.123580@s13g2000cwa.googlegroups. com>,
    > wrote:


    > >This sounds like a known bug involving power management. Is the disk
    > >drive plugged into a powered hub? Do you have the problem if the drive
    > >is the only device connected to that controller?


    > The disk gets its power through the USB socket - it has no power supply
    > of its own, if that's what you mean. I think it's the only device
    > connected to the USB socket at the time.


    > Seems like I remember times when plugging the disk into my laptop made
    > it go down, as if it had momentarily drawn too much power.


    It may be that your laptop cannot provide as much power as the USB disk
    requires, and that Linux is not correctly detecting this condition (or
    your disk is drawing more power that it says it will or your laptop
    can't supply as much power as it says it can). It may help to remove
    all other USB devices. It may help to run on AC power rather than
    battery.

    It may also be that I'm completely barking up the wrong tree and the
    problem has nothing to do with power at all.


  5. Re: Is there a bug in FAT32 filesystem support?

    On Sat, 8 Jul 2006 23:57:32 UTC, davids@webmaster.com wrote:

    >
    > Jim Haynes wrote:
    >
    > > In article <1152354542.422599.123580@s13g2000cwa.googlegroups. com>,
    > > wrote:

    >
    > > >This sounds like a known bug involving power management. Is the disk
    > > >drive plugged into a powered hub? Do you have the problem if the drive
    > > >is the only device connected to that controller?

    >
    > > The disk gets its power through the USB socket - it has no power supply
    > > of its own, if that's what you mean. I think it's the only device
    > > connected to the USB socket at the time.

    >
    > > Seems like I remember times when plugging the disk into my laptop made
    > > it go down, as if it had momentarily drawn too much power.

    >
    > It may be that your laptop cannot provide as much power as the USB disk
    > requires, and that Linux is not correctly detecting this condition (or
    > your disk is drawing more power that it says it will or your laptop
    > can't supply as much power as it says it can). It may help to remove
    > all other USB devices. It may help to run on AC power rather than
    > battery.
    >
    > It may also be that I'm completely barking up the wrong tree and the
    > problem has nothing to do with power at all.


    If it is lack of power from the laptop, you could try a powered hub.

    --
    Cheers - Dave.

  6. Re: Is there a bug in FAT32 filesystem support?

    In comp.os.linux.development.system davids@webmaster.com:

    > Jim Haynes wrote:


    >> In article <1152354542.422599.123580@s13g2000cwa.googlegroups. com>,
    >> wrote:


    >> >This sounds like a known bug involving power management. Is the disk
    >> >drive plugged into a powered hub? Do you have the problem if the drive
    >> >is the only device connected to that controller?


    >> The disk gets its power through the USB socket - it has no power supply
    >> of its own, if that's what you mean. I think it's the only device
    >> connected to the USB socket at the time.


    >> Seems like I remember times when plugging the disk into my laptop made
    >> it go down, as if it had momentarily drawn too much power.


    > It may be that your laptop cannot provide as much power as the USB disk
    > requires, and that Linux is not correctly detecting this condition (or
    > your disk is drawing more power that it says it will or your laptop
    > can't supply as much power as it says it can). It may help to remove
    > all other USB devices. It may help to run on AC power rather than
    > battery.


    > It may also be that I'm completely barking up the wrong tree and the
    > problem has nothing to do with power at all.


    Hard to tell, but the "not enough power" isn't unlikely. Have a
    2.5" USB hd which will not work properly on all PC unless you use
    the Y-USB cable that came with it, drawing power out of two USB
    ports.

    --
    Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
    mail: echo zvpunry@urvzvat.qr | perl -pe 'y/a-z/n-za-m/'
    #bofh excuse 8: static buildup

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