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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1205816

Title:
  Linux software raid + usb3 storage + heavy disk activity = recipe for
  disaster in raring?

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  I have a system with a Nec PCI USB 3 adapter (Renesas Technology Corp.
  uPD720201 USB 3.0 Host Controller) with a Lindy USB3 disk case for 2
  disks attached to it (JMicron Technology Corp. chipset) and two 1TB
  disks inside.  The Lindy disk case is configured to show the 2 disk
  units (in windows it supports fake raid to with proper dip-switch
  configuration).

  Linux is configured to see the two disks as a software raid 1 unit.
  LVM is set up on top of the raid.  Ext4 partitions are created in LVM.

  Apparently things work just fine.  However, if I have heavy disk
  activity (e.g. copy a large iso file to the raid storage), there are
  very frequent issues. In the worst case the machine freezes (flashing
  leds) trashing all the last data written on the raid storage. When the
  machine comes up the raid starts resync which is a painful activity.
  No visible oops, nothing in syslog. In the best case, the array simply
  looses sync.

  Even when things work fine, the disks in the array make clunky noise
  that does not seem proper.

  Also tried with a VIA USB3 controller and with the motherboard
  integrated USB2 controllers. With USB2 things are much slowlier, but
  the result is invariably the same.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image 3.8.0.26.44
  ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
  Uname: Linux 3.8.0-26-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.9.2-0ubuntu8.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  callegar   2818 F.... pulseaudio
  Date: Sun Jul 28 12:09:31 2013
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=c50b4249-43ed-49ef-a3d8-ec7aa9718265
  IwConfig:
   usb0      no wireless extensions.
   
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  MarkForUpload: True
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-26-generic root=/dev/mapper/DISK00-root ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-26-generic N/A
   linux-backports-modules-3.8.0-26-generic  N/A
   linux-firmware                            1.106
  RfKill:
   0: hci0: Bluetooth
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to raring on 2013-05-05 (83 days ago)
  WpaSupplicantLog:
   
  dmi.bios.date: 04/21/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P2.10
  dmi.board.name: N68-S
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.10:bd04/21/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnN68-S:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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