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RE: restore boot block



I tried wiping the first 446 bytes and bytes 511-512 with these commands:

dd if=/dev/zero of=/dev/hda bs=446 count=1
dd if=/dev/zero of=/dev/hda bs=1 skip=510 count=2

I then did a reboot and PXE boot did not occur as expected.  The machine
just sits there not knowing what to do.

-----Original Message-----
From: Robert P. J. Day [mailto:rpjday mindspring com]
Sent: Wednesday, June 18, 2003 3:52 PM
To: Joseph V Moss
Cc: Richard Black; kickstart-list redhat com; Fong Vang;
anaconda-devel-list redhat com
Subject: Re: restore boot block 


On Wed, 18 Jun 2003, Joseph V Moss wrote:

> 
> That's still wrong.  skip= specifies the number of *blocks* to skip.
> 
> So:
> 
>    dd if=/dev/hda of=mypartitions skip=446 bs=1 count=64
>    dd if=/dev/zero of=/dev/hda bs=512 count=1
>    dd if=mypartitions of=/dev/hda skip=446 bs=1

and since the blocksize above is 1, it works just fine.  come on,
folks, this ain't rocket surgery.  it's just "dd".

rday

p.s.  top posting.  bad.  very bad.


--

Robert P. J. Day
Eno River Technologies
Unix, Linux and Open Source training
Waterloo, Ontario

www.enoriver.com




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