Hi list,
I have hardware where the LBA boot fails with "ERR R". Forcing CHS mode
allows me to boot the hardware just fine.
To make life easier, I have added an option "-c" to installboot. This
option sets the global symbol "_force_chs" to 1 in biosboot to save me
from pressing shift at start up.
Regards,
Florian
P.S.: A comment in biosboot.S actually suggested a "-c" option.
Index: installboot.8
===================================================================
RCS file: /cvs/src/sys/arch/i386/stand/installboot/installboot.8,v
retrieving revision 1.29
diff -u -p -u -r1.29 installboot.8
--- installboot.8 6 Mar 2010 16:16:43 -0000 1.29
+++ installboot.8 21 Jan 2014 17:24:59 -0000
@@ -33,7 +33,7 @@
.Nd installs a bootstrap on an FFS disk or partition
.Sh SYNOPSIS
.Nm installboot
-.Op Fl nv
+.Op Fl cnv
.Ar boot
.Ar biosboot
.Ar disk
@@ -52,6 +52,8 @@ Various filesystem parameters are also p
.Pp
The options are as follows:
.Bl -tag -width flag_opt
+.It Fl c
+Force CHS mode in biosboot.
.It Fl n
Do not actually write anything on the disk.
.It Fl v
Index: installboot.c
===================================================================
RCS file: /cvs/src/sys/arch/i386/stand/installboot/installboot.c,v
retrieving revision 1.70
diff -u -p -u -r1.70 installboot.c
--- installboot.c 13 Nov 2013 04:11:34 -0000 1.70
+++ installboot.c 21 Jan 2014 17:24:59 -0000
@@ -75,7 +75,7 @@ struct sym_data {
};
extern char *__progname;
-int verbose, nowrite = 0;
+int verbose, nowrite = 0, forcechs = 0;
char *boot, *proto, *dev, *realdev;
char *protostore;
long protosize;
@@ -87,6 +87,7 @@ struct sym_data pbr_symbols[] = {
{"_inodeblk", 4},
{"_inodedbl", 4},
{"_nblocks", 2},
+ {"_force_chs", 1},
{NULL}
};
@@ -113,7 +114,7 @@ static void sr_installpbr(int, int, int)
static void
usage(void)
{
- fprintf(stderr, "usage: %s [-nv] boot biosboot device\n", __progname);
+ fprintf(stderr, "usage: %s [-cnv] boot biosboot device\n", __progname);
exit(1);
}
@@ -130,8 +131,12 @@ main(int argc, char *argv[])
int devfd;
struct disklabel dl;
- while ((c = getopt(argc, argv, "vn")) != -1) {
+ while ((c = getopt(argc, argv, "cnv")) != -1) {
switch (c) {
+ case 'c':
+ /* Force CHS mode */
+ forcechs = 1;
+ break;
case 'n':
/* Do not actually write the bootblock to disk. */
nowrite = 1;
@@ -542,6 +547,7 @@ getbootparams(char *boot, int devfd, str
sym_set_value(pbr_symbols, "_inodedbl",
((((char *)ap) - buf) + INODEOFF));
sym_set_value(pbr_symbols, "_nblocks", ndb);
+ sym_set_value(pbr_symbols, "_force_chs", forcechs);
if (verbose) {
fprintf(stderr, "%s is %d blocks x %d bytes\n",
@@ -758,6 +764,7 @@ sr_installboot(int devfd)
sym_set_value(pbr_symbols, "_inodeblk", inodeblk);
sym_set_value(pbr_symbols, "_inodedbl", inodedbl);
sym_set_value(pbr_symbols, "_nblocks", nblocks);
+ sym_set_value(pbr_symbols, "_force_chs", forcechs);
if (verbose)
fprintf(stderr, "%s is %d blocks x %d bytes\n",
