[Bug 971033] Re: dd corrupts some .iso data resulting in corrupted file system

[C de-Avillez]

Works for me: I just tried it here, with an USB stick I had around:


[cerdea-aws]cerdea at xango4-wired:~$ sudo dd bs=100M if=/home/cerdea/ISO/precise-server-amd64.iso of=/dev/sdb
6+1 records in
6+1 records out
722776064 bytes (723 MB) copied, 9.50312 s, 76.1 MB/s
[cerdea-aws]cerdea at xango4-wired:~$ dd --version
dd (coreutils) 8.13
(...)
[cerdea-aws]cerdea at xango4-wired:~$ dpkg -l coreutils\* | grep -E ^ii
ii  coreutils                                      8.13-3ubuntu3                                  GNU core utilities
ii  coreutils-dbgsym                               8.13-3ubuntu3                                  debug symbols for package coreutils
[cerdea-aws]cerdea at xango4-wired:~$ 

I then:

(1) locally mounted the USB stick -- seems to be OK, filesystem recognised.
(2) move the USB stick to another machine, and booted from it -- installation starts
(3) checked disk for errors: no errors.

Can you describe, step by step, your tries? Please include full output
for 'dd'.

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https://bugs.launchpad.net/bugs/971033

Title:
  dd corrupts some .iso data resulting in corrupted file system

Status in “coreutils” package in Ubuntu:
  Incomplete

Bug description:
  I have attempted to copy four different .iso's (and for a few, I re-
  downloaded and tried again) on 4 different USB drives.  Recently, this
  method of .iso copying no longer worked.  The data from and .iso I use
  is changed at some point resulting in a corrupted partition on the USB
  drive and an unbootable device.

  I have used as a normal user, sudo, default settings and tweaked.
  Nothing is working.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: coreutils 8.13-3ubuntu3
  ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
  Uname: Linux 3.2.0-21-generic x86_64
  ApportVersion: 2.0-0ubuntu2
  Architecture: amd64
  Date: Sun Apr  1 15:27:54 2012
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120314)
  ProcEnviron:
   TERM=xterm
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: coreutils
  UpgradeStatus: No upgrade log present (probably fresh install)

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