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List:       linux-usb-users
Subject:    Re: [Linux-usb-users] USB problem (long)
From:       Alan Stern <stern () rowland ! harvard ! edu>
Date:       2005-08-24 14:40:55
Message-ID: Pine.LNX.4.44L0.0508241037140.4847-100000 () iolanthe ! rowland ! org
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On Tue, 23 Aug 2005, David Relson wrote:

> Yes, last night was good with the 2.6.11 kernel.  Today hasn't been
> quite as good:
> 
> [root@osage ~]# uname -a
> Linux osage.osagesoftware.com 2.6.11-12mdk #1 Mon Jun 27 23:18:37 MDT 2005 i686 AMD \
> Athlon(tm) XP unknown GNU/Linux 
> ### hotplug ...
> 
> Aug 22 21:10:19 osage kernel: usb 4-2: new high speed USB device using ehci_hcd and \
>                 address 3
> Aug 22 21:10:19 osage kernel: scsi2 : SCSI emulation for USB Mass Storage devices
> Aug 22 21:10:26 osage kernel:   Vendor: ST320082  Model: 2A                Rev:  0 \
>                 0
> Aug 22 21:10:26 osage kernel:   Type:   Direct-Access                      ANSI \
>                 SCSI revision: 00
> Aug 22 21:10:26 osage kernel: SCSI device sda: 390721968 512-byte hdwr sectors \
>                 (200050 MB)
> Aug 22 21:10:26 osage kernel: sda: assuming drive cache: write through
> Aug 22 21:10:26 osage kernel: SCSI device sda: 390721968 512-byte hdwr sectors \
>                 (200050 MB)
> Aug 22 21:10:26 osage kernel: sda: assuming drive cache: write through
> Aug 22 21:10:26 osage kernel:  /dev/scsi/host2/bus0/target0/lun0: p1
> Aug 22 21:10:26 osage kernel: Attached scsi disk sda at scsi2, channel 0, id 0, lun \
>                 0
> Aug 22 21:10:26 osage scsi.agent[13246]: disk at \
>                 /devices/pci0000:00/0000:00:10.3/usb4/4-2/4-2:1.0/host2/target2:0:0/2:0:0:0
>                 
> Aug 22 21:10:26 osage kernel: FAT: Did not find valid FSINFO signature.
> Aug 22 21:10:26 osage kernel:      Found signature1 0x00000000 signature2 \
>                 0x00000000 (sector = 1)
> Aug 22 21:10:26 osage kernel: FAT: Filesystem panic (dev sda)
> Aug 22 21:10:26 osage kernel:     fat_get_cluster: invalid cluster chain (i_pos 0)
> Aug 22 21:10:26 osage kernel:     File system has been set read-only
> Aug 22 21:10:26 osage kernel: ReiserFS: sda1: found reiserfs format "3.6" with \
>                 standard journal
> Aug 22 21:10:36 osage kernel: ReiserFS: sda1: using ordered data mode
> Aug 22 21:10:36 osage kernel: ReiserFS: sda1: journal params: device sda1, size \
> 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, \
>                 max trans age 30
> Aug 22 21:10:36 osage kernel: ReiserFS: sda1: checking transaction log (sda1)
> Aug 22 21:10:37 osage kernel: ReiserFS: sda1: Using r5 hash to sort names
> Aug 22 21:10:37 osage kernel: ReiserFS: sda1: warning: Created .reiserfs_priv on \
> sda1 - reserved for xattr storage.

> ### TROUBLE ###
> Aug 23 14:30:35 osage kernel: usb 4-2: reset high speed USB device using ehci_hcd \
>                 and address 3
> Aug 23 14:30:45 osage kernel: scsi: Device offlined - not ready after error \
>                 recovery: host 2 channel 0 id 0 lun 0
> Aug 23 14:30:45 osage kernel: SCSI error : <2 0 0 0> return code = 0x50000
> Aug 23 14:30:45 osage kernel: end_request: I/O error, dev sda, sector 226583353
> Aug 23 14:30:45 osage kernel: scsi2 (0:0): rejecting I/O to offline device
> Aug 23 14:30:45 osage kernel: scsi2 (0:0): rejecting I/O to offline device
> Aug 23 14:30:45 osage kernel: Buffer I/O error on device sda1, logical block 8210
> Aug 23 14:30:45 osage kernel: lost page write due to I/O error on sda1
> Aug 23 14:30:45 osage kernel: scsi2 (0:0): rejecting I/O to offline device

This is the sort of thing I hope won't occur with 2.6.13.  Notice by the 
way that the disk was set offline, but there's nothing about a 
disconnection.  Under those circumstances you shouldn't see any processes 
hanging -- just a bunch of I/O errors.

Alan Stern



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