dd Bug using \.\PhysicalDriveX ?

Corinna Vinschen corinna-cygwin@cygwin.com
Thu Sep 20 08:01:00 GMT 2007

On Sep 19 14:53, DePriest, Jason R. wrote:
> On 9/19/07, Eric Blake <> wrote:
> > Scalzott, Todd <> writes:
> > > I've discovered what I believe to be a problem with "dd" on several
> > > different XP SP2 systems with Cygwin installed involving the usage of
> > > Windows' \\.\PhysicalDrive nomenclature.
> >
> > That's your problem.  Cygwin is a Linux emulation, and use of Window's \\.\
> > nomenclature is not guaranteed to work.  Using the corresponding posix-y name
> > is more likely to succeed, in which case the bug is not in dd but in your usage.
> >
> > [...]
> I concur with Eric Blake.  I have used dd, dd_rescue, aimage, and the
> sleuthkit under Cygwin using the /dev/sdX nomenclature.
> It works once you can figure out which /dev/sdX corresponds to which
> device+partition.

...which isn't that tricky.  In the Disk Management tool (for instance
right click "My Computer" -> "Manage" to get there via the "Computer
Management" admin tool) disks are numbered "Disk 0", "Disk 1", etc.
This order corresponds with /dev/sda, /dev/sdb, etc.  Partitions are
numbered left to right.  /dev/sda1 corresponds to the first partition,

Similar for CD-ROM and DVD drives.  In the Disk Management tool they are
numbered "CD-ROM 0", "CD-ROM 1", etc, which corresponds to /dev/sr0,
/dev/sr1, etc..  Alternatively to /dev/scd0, /dev/scd1, etc.

For tape drives, have a look into the Device Manager.  The properties
dialog of each tape drive has a tab "Tape Symbolic Name".  Tape0
corresponds to /dev/st0, /dev/nst0, Tape1 to /dev/st1, /dev/nst1, etc.


Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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