Re: USB misbehavior causes system hang

[Eric Buddington]

On Mon, Mar 05, 2007 at 02:17:28AM -0800, Andrew Morton wrote:
> > On Tue, 27 Feb 2007 09:06:21 -0500 Eric Buddington <ebuddington@xxxxxxxxxxx> wrote:
> > 2.6.20-mm2 #1 Mon Feb 26 13:16:04 EST 2007 i686 unknown
> > 
> > I have an external USB drive (WD MyBook 5000YS), which I use for backups.
> > 
> > When I try to back up to it, it works for a while, but inevitably
> > starts resetting like mad, gives I/O errors, and then (here's the
> > problem), the softdog module reboots the system.
> > 
> > ---------------------------
> > scsi1 : SCSI emulation for USB Mass Storage devices
> > input: Western Digital External HDD as /class/input/input8
> > input: USB HID v1.11 Device [Western Digital External HDD] on usb-0000:00:03.2-6
> > .2
> > scsi 1:0:0:0: Direct-Access     WD       5000YS External  106a PQ: 0 ANSI: 4
> > SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
> > sda: Write Protect is off
> > sda: assuming drive cache: write through
> > SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
> > sda: Write Protect is off
> > sda: assuming drive cache: write through
> >  sda: sda1 sda2
> > sd 1:0:0:0: Attached scsi disk sda
> > sd 1:0:0:0: Attached scsi generic sg0 type 0
> > reiser4[pdflush(194)]: disable_write_barrier (fs/reiser4/wander.c:234)[zam-1055]
> > :
> > NOTICE: md1 does not support write barriers, using synchronous write instead.
> > reiser4: sda2: found disk format 4.0.0.
> > 
> > ---- (works fine here for a while, then:) ----------
> > 
> > usb 1-6.2: reset high speed USB device using ehci_hcd and address 36
> > usb 1-6.2: device descriptor read/64, error -110
> > usb 1-6.2: device descriptor read/64, error -110
> > usb 1-6.2: reset high speed USB device using ehci_hcd and address 36
> > usb 1-6.2: device descriptor read/64, error -110
> > usb 1-6.2: device descriptor read/64, error -110
> > usb 1-6.2: reset high speed USB device using ehci_hcd and address 36
> > usb 1-6.2: device descriptor read/8, error -110
> > usb 1-6.2: device descriptor read/8, error -110
> > usb 1-6.2: reset high speed USB device using ehci_hcd and address 36
> > usb 1-6.2: device descriptor read/8, error -110
> > usb 1-6.2: device descriptor read/8, error -110
> > sd 1:0:0:0: scsi: Device offlined - not ready after error recovery
> > sd 1:0:0:0: SCSI error: return code = 0x00050000
> > end_request: I/O error, dev sda, sector 919931588
> > sd 1:0:0:0: rejecting I/O to offline device
> > sd 1:0:0:0: SCSI error: return code = 0x00010000
> > end_request: I/O error, dev sda, sector 919931828
> > sd 1:0:0:0: rejecting I/O to offline device
> > sd 1:0:0:0: rejecting I/O to offline device
> > sd 1:0:0:0: rejecting I/O to offline device
> 
> Does 2.6.20 do this?  2.6.21-rc1?

2.6.20-mm2 seems to be OK; I've been backing up to the disk for a few
hours now, with no problem.

-Eric
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