Public bug reported:

"Read and write benchmarking" in "disk utility" requires to work on a 
completely empty disk.
1. I tried to format the only volume of the usb disk, "Read and write 
benchmarking" does not  accept this type of "empty".
2. I tried to format the entire driver of the usb disk, this time "Read and 
write benchmarking" can work on the usb disk.
3. I repeat step 2 to benchmark the second usb disk.
4. I found that neither benchmarked usb disks can be used to create bootable 
disk.
5. I found that data saved to both usb disks might disappear.
6. I found that if reboot into Windows, any usb disks (including both 
above-mentioned usb disks and any other usb disks) plugged into the usb ports 
would cause Windows reboot.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gnome-disk-utility 2.32.1-0ubuntu4
ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic i686
Architecture: i386
Date: Tue Sep 27 18:06:05 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=zh_CN:en
 PATH=(custom, no user)
 LANG=zh_CN.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-disk-utility
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gnome-disk-utility (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 natty

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https://bugs.launchpad.net/bugs/860433

Title:
  read-and-write benchmarking damages usb disk and usb port

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