[Bug 1294877] Re: usb-creator fails to wipe usb device when the device has ext4 partition

[Martin Pitt]

Oops, thanks Timo :)

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https://bugs.launchpad.net/bugs/1294877

Title:
  usb-creator fails to wipe usb device when the device has ext4
  partition

Status in OEM Priority Project:
  In Progress
Status in OEM Priority Project trusty series:
  New
Status in abstraction for enumerating and managing block devices:
  Invalid
Status in “udisks2” package in Ubuntu:
  Invalid
Status in “usb-creator” package in Ubuntu:
  Fix Released
Status in “udisks2” source package in Trusty:
  Invalid
Status in “usb-creator” source package in Trusty:
  Confirmed

Bug description:
  [Impact]

   * This bug is a runtime exception caused by invalid erase type.
   * With this bug users can not erase disks with usb-creator.

  [Test Case]

   * Prepare an usbstick with any partition(s),
     this could be done with "gparted".
   * Launch usb-creator-gtk or usb-creator-kde.
   * Insert the usbstick, click the button "Erase Disk".
   * It will popup an exception window with the error message similar to:

          Traceback (most recent call last):
            File "format.py", line 7, in <module>
              block.call_format_sync('dos', GLib.Variant('a{sv}', {'erase': GLib.Variant('s', '')}), None)
          gi._glib.GError: GDBus.Error:org.freedesktop.UDisks2.Error.Failed: Error erasing device: Unknown or unsupported erase type `'

   * Please be noted, the erase operation may still fail even with
     this bug properly fixed due to some other bugs, such as bug #1318954.

  [Regression Potential]

   * Since the erasing operation is also blocked by other bugs,
     we may not be able to verify the entire erasing operation,
     in such a case we can not promise the effect of the patch,
     and it may (although not sure to) has other side effect such as:
   * The patch for this bug changes the erase type to "zero",
     according to the UDisk2 API [1] it will erase the entire device,
     this may cause a long time to complete.

  [1]: http://udisks.freedesktop.org/docs/latest/gdbus-
  org.freedesktop.UDisks2.Block.html#gdbus-method-org-freedesktop-
  UDisks2-Block.Format

  A dialog with the following text appears anytime I try to wipe my usb
  pen (both when partitioned and unpartitioned):

  org.freedesktop.DBus.Python.gi._glib.GError: Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/dbus/service.py", line 707, in _message_cb
      retval = candidate_method(self, *args, **keywords)
    File "/usr/share/usb-creator/usb-creator-helper", line 239, in Format
      block.call_format_sync('dos', GLib.Variant('a{sv}', {'erase': GLib.Variant('s', '')}), None)
  gi._glib.GError: GDBus.Error:org.freedesktop.UDisks2.Error.Failed: Error synchronizing after initial wipe: Timed out waiting for object

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: usb-creator-gtk 0.2.55
  ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
  Uname: Linux 3.13.0-17-generic x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Mar 19 23:26:15 2014
  InstallationDate: Installed on 2013-10-05 (165 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64 (20131005)
  SourcePackage: usb-creator
  UpgradeStatus: Upgraded to trusty on 2013-12-10 (99 days ago)

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