Hisashi T Fujinaka wrote:

> I've deleted my NetBSD partition info. I really need to find the data in
> the last partition, which is /dev/wd1e on my disk.

Last time I did something like that some years ago, I fixed it by
locating the filesystem super blocks which let me manually calculate
what the partitions should be, and I then carefully re-labelled the
disk.

The program below was what I used to find the super blocks.  The
suggestions already provided about locating a backup disklabel are
easier, but this works even when a backup disklabel is not found.

Regards,

Giles

/*
 * Find superblocks on a BSD FFS filesystem.
 *
 * On NetBSD, need only to check for FS_MAGIC.  HP-UX has about three
 * flavours of FS_MAGIC. You'll need something else for a Veritas
 * file system.
 */

#include <sys/param.h>
#include <sys/types.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>

#include <fcntl.h>
#include <stdio.h>

/*
 * Usually larger on HP-UX -- too small will only result in the odd
 * false match.
 */
#define BLOCKSIZE (4 * 1024)

int
main(int argc, char *argv[])
{
	char            block[BLOCKSIZE];
	int             fd;
	struct fs      *filesys;
	int             n;
	int             blockno;

	blockno = 0;
	filesys = (struct fs *) block;

	if (argc != 2) {
		fprintf(stderr, "usage: findsb raw_device\n");
		exit(1);
	}

	if ((fd = open(argv[1], O_RDONLY)) < 0) {
		perror(argv[1]);
		exit(1);
	}

	while ((n = read(fd, block, BLOCKSIZE)) == BLOCKSIZE) {
		if (filesys->fs_magic == FS_MAGIC)
			printf("%d\n", blockno * (BLOCKSIZE / 512));
		blockno++;
	}
}