linux-kernel - Re: Problems with USB disk

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Date:	Fri, 10 Aug 2007 14:43:53 +0200
From:	Niels <zorglub_olsen@...mail.com>
To:	linux-kernel@...r.kernel.org
Subject:  Re: Problems with USB disk

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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