On Aug 14, 2009, at 12:48 PM, Robert Nichols rnicholsNOSPAM@comcast.net wrote:
Ross Walker wrote:
On Fri, Aug 14, 2009 at 5:00 AM, Chan Chung Hang Christopherchristopher.chan@bradbury.edu.hk wrote:
Question now is, was the first sector of partition 1 damaged (was it 63 or 64 sectors dd'd)?
If so it will require a more tricky procedure to fix.
No, the ext2 file system does not use the first 1K block of the partition. That space is left free for a boot loader. The first super block of the file system is the 2nd 1K block of the partition, and even if that gets overwritten it is easily recovered from one of the backup super blocks.
I did not know that, good information.
So stage2 is written in first 1k of the partition?
Ah but I believe the OP has the partition setup as a LVM PV. Question is does LVM leave the first 1k free for a stage2 boot loader?
And if the LVM metadata is corrupt is there a second copy at the end of the PV?
-Ross