Matthias Bertschy wrote: > Hello, > > Cygwin version: 1.5.12 > Windows XP Professional: Ver 5.1 Build 2600 Service Pack 2 > > I am trying to use Cygwin's dd command as a post Windows XP install > command to restore our custom GRUB to the MBR after an unattended > installation. > For safety reasons, I would like to restore only the first 446 bytes of > the MBR to keep the existing partition table. > > The command line to use would normally be: > dd if=boot.MBR of=/dev/sda bs=446 count=1 > --> dd: writing '/dev/sda': No space left on device > 1+0 records out > 0+0 records in > (I also tried with bs=512 and I get the same output) > > After reading: > http://sourceware.org/ml/cygwin/2001-01/msg00193.html > I decided to try the following: > mount -s -b -f //./physicaldrive0 /dev/hd00 > dd if=boot.MBR of=/dev/hd00 bs=446 count=1 > --> dd: opening '/dev/hd00': Invalid argument > (even if I change the device /dev/xxx name, I get the same output) > > I even tried directly: > dd if=boot.MBR of=//./physicaldrive0 bs=446 count=1 > --> dd: opening '//./physicaldrive0': Invalid argument > > After so many unefficient tries, I decided to read from it, just to see: > dd if=//./physicaldrive0 bs=446 count=1 > --> dd: reading '//./physicaldrive0': Is a directory > 0+0 records out > 0+0 records in > > So here is the: > QUESTION1: Does anyone know how to write into MBR from Windows XP > using Cygwin's dd ? > QUESTION2: I am doing somathing wrong since dd sees > //./physicaldrive0 as a directory ? > > Any help would be appreciated.
Using /dev/sda should work. -- Cliff -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
