External USB harddrive suddenly gets unmounted

[Fabus]

My external harddrive randomly gets unmounted. I can't really reproduce it, it just happens quite often.
I've got the Enermax Jazz case and a 1.5 TB WD SATA device.

This is my syslog:
May 15 16:39:13 kernel: [18604.056419] usb 1-6: USB disconnect, address 9
May 15 16:39:13 kernel: [18604.057015] sd 5:0:0:0: Device offlined - not ready after error recovery
May 15 16:39:13 kernel: [18604.057050] sd 5:0:0:0: [sdb] Unhandled error code
May 15 16:39:13 kernel: [18604.057055] sd 5:0:0:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
May 15 16:39:13 kernel: [18604.057063] sd 5:0:0:0: [sdb] CDB: Read(10): 28 00 1c 50 82 37 00 00 f0 00
May 15 16:39:13 kernel: [18604.057084] end_request: I/O error, dev sdb, sector 475038263
May 15 16:39:13 kernel: [18604.057142] sd 5:0:0:0: [sdb] Unhandled error code
May 15 16:39:13 kernel: [18604.057147] sd 5:0:0:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
May 15 16:39:13 kernel: [18604.057154] sd 5:0:0:0: [sdb] CDB: Read(10): 28 00 1c 50 83 27 00 00 10 00
May 15 16:39:13 kernel: [18604.057173] end_request: I/O error, dev sdb, sector 475038503

What can I do?

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-22-generic 2.6.32-22.33
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
AlsaVersion:
 Advanced Linux Sound Architecture Driver Version 1.0.22.1.
 Compiled on Apr 29 2010 for kernel 2.6.32-22-generic (SMP).
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: fabian 1492 F.... pulseaudio
 /dev/snd/pcmC0D0p: fabian 1492 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0x90440000 irq 27'
   Mixer name : 'SigmaTel STAC9221 A1'
   Components : 'HDA:83847680,106b0800,00103601'
   Controls : 18
   Simple ctrls : 10
Date: Sat May 15 16:47:39 2010
HibernationDevice: RESUME=UUID=f6c3168e-5dfa-4ca6-bd49-96f5c6500cae
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Release Candidate i386 (20100419.1)
MachineType: Apple Inc. Macmini2,1
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=deb7e5bb-fc5d-4610-9a76-22990c07473b ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
SourcePackage: linux
dmi.bios.date: 06/28/07
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MM21.88Z.009A.B00.0706281359
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F4208EAA
dmi.board.vendor: Apple Inc.
dmi.board.version: PVT
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 4
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F4208EAA
dmi.modalias: dmi:bvnAppleInc.:bvrMM21.88Z.009A.B00.0706281359:bd06/28/07:svnAppleInc.:pnMacmini2,1:pvr1.0:rvnAppleInc.:rnMac-F4208EAA:rvrPVT:cvnAppleInc.:ct4:cvrMac-F4208EAA:
dmi.product.name: Macmini2,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

[Jeremy Foshee (jeremyfoshee)]

Hi Fabus,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

    [This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Fabus (fabian-gebert-hh)]

On the 2.6.34, this doesn't happen. Is there any way to fix the current stable Lucid kernel?

[Fabus (fabian-gebert-hh)]

this bug doesn't seem to be related to Ubuntu. It only happens if the VirtualBox module from VirtualBox.org ist loaded (not the OSE edition from Ubuntu).

[Fabus (fabian-gebert-hh)]

Now back at 2.6.32 with VirtualBox 3.2 installed I am getting
May 20 11:31:36 kernel: [13459.044453] usb 1-5: USB disconnect, address 4
May 20 11:31:36 kernel: [13459.044460] sd 4:0:0:0: Device offlined - not ready after error recovery
May 20 11:31:36 kernel: [13459.044479] sd 4:0:0:0: [sdb] Unhandled error code
May 20 11:31:36 kernel: [13459.044484] sd 4:0:0:0: [sdb] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
May 20 11:31:36 kernel: [13459.044492] sd 4:0:0:0: [sdb] CDB: Read(10): 28 00 12 53 9b 5f 00 00 f0 00
May 20 11:31:36 kernel: [13459.044605] sd 4:0:0:0: [sdb] Unhandled error code
May 20 11:31:36 kernel: [13459.044610] sd 4:0:0:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
May 20 11:31:36 kernel: [13459.044616] sd 4:0:0:0: [sdb] CDB: Read(10): 28 00 12 53 9c 4f 00 00 10 00

[Fabus (fabian-gebert-hh)]

actually, this happens whether or not VirtualBox is installed. And it happens with both 2.6.32 as well as 2.6.34.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.