Date: Sat, 15 Apr 2000 20:12:50 +0100 From: Ben Smithurst <ben@scientia.demon.co.uk> To: Scott Blachowicz <scott@sabami.seaslug.org> Cc: freebsd-questions@freebsd.org Subject: Re: Erasing an IDE disk Message-ID: <20000415201250.A23900@strontium.scientia.demon.co.uk> In-Reply-To: <20000415095209.A58006@sabami.seaslug.org> References: <20000414161657.A35142@sabami.seaslug.org> <20000415165532.A16019@strontium.scientia.demon.co.uk> <20000415095209.A58006@sabami.seaslug.org>
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Scott Blachowicz wrote:
> What did you use to do that? And what OS version?
FreeBSD 3.4, I think (definitely FreeBSD 3.something). I used this
small program:
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define DISK "/dev/wd1"
int sig = 0;
void nop(int s) {
sig = 1;
return;
}
int
main(int argc, char *argv[]) {
char buf[64 << 10];
int fd, ch, sverr;
ssize_t n, tot;
struct sigaction sa;
sa.sa_handler = nop;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sigaction(SIGINT, &sa, NULL);
if (argc > 1)
ch = strtol(argv[1], NULL, 0);
else
ch = 0xff;
memset(buf, ch, sizeof buf);
fd = open(DISK, O_WRONLY);
if (fd < 0)
err(1, DISK);
warnx("ch=%x buf[0]=%x", ch, (unsigned int)buf[0]);
tot = 0;
while (!sig && (n = write(fd, buf, sizeof buf)) == sizeof buf)
tot += n;
sverr = errno;
warnx("total %ld bytes written", (long)tot);
if (sig)
errx(1, "exiting because of signal");
errno = sverr;
if (n < 0)
err(1, "write");
else
errx(1, "partial write of %ld bytes%s",
(long)n, (n == 0) ? " (end of device?)" : "");
}
Be sure to set the #define DISK correctly. :-) Then run it like
./diskerase 0x0
./diskerase 0xff
./diskerase 0x0
#include <std_disclaimer.h>
Run at your own risk, etc. (I just mis-typed "risk" as "disk", which
would probably be just as valid in this case. :-)
--
Ben Smithurst / ben@scientia.demon.co.uk / PGP: 0x99392F7D
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