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 inSo 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.
Matthias
PS: If I do only: dd if=//./physicaldrive0 --> dd is wrinting things on the command line.
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