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    SubjectRe: Problems with USB disk
    Date
    On Wednesday 08 August 2007 12:57, Ismail Dönmez wrote:

    > On Wednesday 08 August 2007 13:48:29 you wrote:
    >> On Tuesday 07 August 2007 23:18, 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 am seeing a similar problem with 2.6.22 and 2.6.23-* kernels with my 60G
    > iPod Video, works fine with 2.6.18 kernel though.
    >
    > Rehards,
    > ismail
    >

    (no need to CC me)

    So far I'm seeing this:

    - On 2.6.21 I mount the drive. After a while it spins down, and when I then
    unmount it, an error pops up in dmesg.

    - On 2.6.18 I can't provoke the same error. The drive doesn't appear to spin
    down. I don't know if the data corruption from 2.6.21 occurs with regular
    use.

    There are a number of other factor I need to eliminate on my system, but
    that's it so far. CONFIG_USB_SUSPEND is not set on either kernel.


    //Niels

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