linux-kernel - Re: Problems with USB disk

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Date:	Wed, 08 Aug 2007 12:48:29 +0200
From:	Niels <zorglub_olsen@...mail.com>
To:	linux-kernel@...r.kernel.org
Subject:  Re: Problems with USB disk

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.
> 
> thanks,
> 
> greg k-h


It has its own power supply. All cables are new and plugged in securely.

Thank you for your answer,
Niels

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