Re: Problems with USB disk

[Bill Davidsen <davidsen@tmr.com>]

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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