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    SubjectRe: Problems with USB disk
    Greg KH wrote:
    > On Tue, Aug 07, 2007 at 10:26:15PM +0200, Niels wrote:
    >> Hi,
    >>
    >> I'm having problems with a new 500 GB USB disk. It works, but sometimes I
    >> get these in dmesg:
    >>
    >>
    >> usb 1-3: reset high speed USB device using ehci_hcd and address 2
    >> usb 5-1: USB disconnect, address 2
    >> drivers/usb/class/usblp.c: usblp0: removed
    >> sd 0:0:0:0: Device not ready: <6>: Sense Key : 0x2 [current]
    >> : ASC=0x4 ASCQ=0x2
    >> end_request: I/O error, dev sda, sector 254148215
    >> sd 0:0:0:0: Device not ready: <6>: Sense Key : 0x2 [current]
    >> : ASC=0x4 ASCQ=0x2
    >> end_request: I/O error, dev sda, sector 252434023
    >> EXT3-fs error (device sda1): ext3_find_entry: reading directory #15761836
    >> offset 0
    >>
    >>
    >> There's also a printer connected. This is on a pci/usb2 card. When the above
    >> happens, I get I/O errors. When I mount the drive next, there are errors
    >> and often missing files. Quite annoying!
    >>
    >> Kernel is 2.6.21
    >>
    >> What's going on?
    >
    > You have a low voltage issue, or a bad cable. The device is
    > electronically disconnecting itself. Try using a externally-powered
    > hub, or a new cable.
    >
    I see the external drive becoming read-only, although I haven't checked
    the dmesg for the events, since other things in my system generate a
    bunch of output I have to wade through.

    New cable, separate power, doesn't do it under 2.6.20-* Fedora or
    2.6.21.x kernel.org kernels.

    I'll check the dmesg next time it happens, but I doubt a kernel version
    change would heal the hardware issues you mention.


    --
    Bill Davidsen <davidsen@tmr.com>
    "We have more to fear from the bungling of the incompetent than from
    the machinations of the wicked." - from Slashdot
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