linux-kernel - Re: Problems with USB disk

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Date:	Sun, 12 Aug 2007 11:54:19 +0200
From:	Niels <zorglub_olsen@...mail.com>
To:	linux-kernel@...r.kernel.org
Subject:  Re: Problems with USB disk

On Friday 10 August 2007 14:43, Niels wrote:

> 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


OK, on a vanilla 2.6.18.8 I also have this problem, with both the pci/usb2
card, and the usb1 on the board. I listen to music from the drive, and
after some time (10-20 minutes or so), it freaks out:

=========
sd 1:0:0:0: Device not ready: <6>: Current: sense key=0x2
    ASC=0x4 ASCQ=0x2
end_request: I/O error, dev sda, sector 126693711
sd 1:0:0:0: Device not ready: <6>: Current: sense key=0x2
    ASC=0x4 ASCQ=0x2
end_request: I/O error, dev sda, sector 126693711
sd 1:0:0:0: Device not ready: <6>: Current: sense key=0x2
    ASC=0x4 ASCQ=0x2
end_request: I/O error, dev sda, sector 126693711
=========

Will updating to 2.6.23 and turning off autosuspend explicitly help? Will
putting the disk on a powered hub help?


//Niels


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