Read and respond to this message at: https://sourceforge.net/forum/message.php?msg_id=7586250 By: kbroadey
md5sum is part of CoreUtils 5.3.0, as is dd. The reason for the extra pipe is that I found a hint somewhere on the worldwide web that piping dd into md5sum was the way to get a CD checksum, because you want to be summing the entire ISO image of the disk, not just the disk contents. But you're right - md5sum /dev/cdrom works on Ubuntu, giving the correct answer, and md5sum \\.\D: with GnuWin32 gives the same wrong answer on Windows, do the dd is superfluous. One thing I have noticed is that "df" on both Ubuntu and Windows reports the CD size as 476630 1K blocks. However, "dd bs=1k" on Ubuntu reports that it has processed 476930 blocks (300 more than there are on the CD) while on Windows it reports 476630. Also, if I do "dd bs=1k count=476630" on Ubuntu, I get the same checksum as I do on Windows. Which means that Ubuntu is finding 300K more on the CD that Windows is seeing. Am I runnning into some bizarre blocksize issue? Or does \\.\D: on Windows give me the mounted contents of the ISO 9660 image, while /dev/cdrom on Ubuntu gives me the raw disk image (which is what I need). So the bottom line seems to be - how do I get at the raw CD disk image in Windows, because \\.\D: isn't giving it to me. ______________________________________________________________________ You are receiving this email because you elected to monitor this forum. To stop monitoring this forum, login to SourceForge.net and visit: https://sourceforge.net/forum/unmonitor.php?forum_id=74807 ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ GnuWin32-Users mailing list GnuWin32-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gnuwin32-users
