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[oakwhiz <oakwhiz@xxxxxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1200817

Title:
  UDF filesystem shows negative disk space used in df command

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I have a USB drive that has two partitions. One is btrfs and the other
  is UDF. The UDF filesystem shows as having negative disk space used
  when I run df -h. I can provide additional information if needed. I
  have provided the outputs of df -h and mount below:

  $ df -h
  Filesystem              Size  Used Avail Use% Mounted on
  udev                    7.8G   12K  7.8G   1% /dev
  tmpfs                   3.2G  1.1M  3.2G   1% /run
  none                    5.0M     0  5.0M   0% /run/lock
  none                    7.9G  4.1M  7.9G   1% /run/shm
  /dev/sdc2               899M   56K  242M   1% /media/09d23fe1-9346-4ffe-bcbf-0a31049d61e2
  /dev/sdc1                29G -6.8G   36G    - /media/disk

  $ mount
  /dev/sdc2 on /media/09d23fe1-9346-4ffe-bcbf-0a31049d61e2 type btrfs (rw,nosuid,nodev,uhelper=udisks)
  /dev/sdc1 on /media/disk type udf (rw,nosuid,nodev,uid=1000,gid=1000,iocharset=utf8,umask=0077,uhelper=udisks)

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.5.0-36-generic 3.5.0-36.57~precise1
  ProcVersionSignature: Ubuntu 3.5.0-36.57~precise1-generic 3.5.7.14
  Uname: Linux 3.5.0-36-generic x86_64
  NonfreeKernelModules: fglrx
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
  ApportVersion: 2.0.1-0ubuntu17.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  oakwhiz    2762 F.... pulseaudio
   /dev/snd/controlC1:  oakwhiz    2762 F.... pulseaudio
   /dev/snd/controlC0:  oakwhiz    2762 F.... pulseaudio
   /dev/snd/pcmC0D0p:   oakwhiz    2762 F...m pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf7e10000 irq 50'
     Mixer name	: 'Realtek ALC892'
     Components	: 'HDA:10ec0892,1043841b,00100302'
     Controls      : 46
     Simple ctrls  : 21
  Card1.Amixer.info:
   Card hw:1 'HDMI'/'HDA ATI HDMI at 0xf7d60000 irq 51'
     Mixer name	: 'ATI R6xx HDMI'
     Components	: 'HDA:1002aa01,00aa0100,00100300'
     Controls      : 36
     Simple ctrls  : 6
  Card2.Amixer.info:
   Card hw:2 'CX23885'/'Conexant CX23885 at cx23885[0]'
     Mixer name	: ''
     Components	: ''
     Controls      : 0
     Simple ctrls  : 0
  Card2.Amixer.values:
   
  Date: Fri Jul 12 18:43:52 2013
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=5d8a4945-0f02-4ee3-aed8-eabba0f69d36
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: System manufacturer System Product Name
  MarkForUpload: True
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-36-generic root=UUID=cf08cbcc-af52-40f3-b9d3-01298709b562 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-36-generic N/A
   linux-backports-modules-3.5.0-36-generic  N/A
   linux-firmware                            1.79.4
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/01/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1001
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P8Z77-V LK
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1001:bd02/01/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8Z77-VLK:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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