18.11.2016 23:43, Robert LeBlanc пишет:
>
> grub> ls -l
> Device hd0: No known filesystem detected - Sector size 512B - Total size
> 2147483648KiB
> Partition hd0,gpt2: No known filesystem detected - Partition start at
> 2048KiB - Total size 5368707055.5KiB
> Partition hd0,gpt1: No known filesystem detected - Partition start at
> 1024KiB - Total size 1024KiB
Oh. Could you please run attached patch on top of pure GIT (without your
patch) and send me output. It adds some debug print to biosdisk driver
so we can try to guess what happens. After building, generate minimal
image to avoid too much output
bor@bor-Latitude-E5450:~/build/grub$ echo "set debug=biosdisk" >
/tmp/load.cfg
bor@bor-Latitude-E5450:~/build/grub$ pkgdatadir=$PWD ./grub-mkimage -O
i386-pc -d grub-core -o grub.img -p "(md/xxx)/" -c /tmp/load.cfg
biosdisk mdraid1x
Actual array name is irrelevant and is there simply to force raid scan.
After that copy it to /boot, go to GRUB CLI and run
multiboot /boot/grub.img
boot
From: Andrei Borzenkov <arvidj...@gmail.com>
Subject: [PATCH] biosdisk: debug output for disk parameters
Add debug output to track BIOS behavior with 4Kn disks.
---
grub-core/disk/i386/pc/biosdisk.c | 45 +++++++++++++++++++++++++++++++++++----
include/grub/i386/pc/biosdisk.h | 1 +
2 files changed, 42 insertions(+), 4 deletions(-)
diff --git a/grub-core/disk/i386/pc/biosdisk.c b/grub-core/disk/i386/pc/biosdisk.c
index f0aadd1..ef69f13 100644
--- a/grub-core/disk/i386/pc/biosdisk.c
+++ b/grub-core/disk/i386/pc/biosdisk.c
@@ -84,6 +84,8 @@ grub_biosdisk_rw_int13_extensions (int ah, int drive, void *dap)
grub_bios_interrupt (0x13, ®s);
return (regs.eax >> 8) & 0xff;
+ // return regs.flags & GRUB_CPU_INT_FLAGS_CARRY ? (regs.eax >> 8) & 0xff : 0;
+
}
/*
@@ -335,6 +337,7 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
grub_uint64_t total_sectors = 0;
int drive;
struct grub_biosdisk_data *data;
+ int ret;
drive = grub_biosdisk_get_drive (name);
if (drive < 0)
@@ -369,11 +372,17 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
struct grub_biosdisk_drp *drp
= (struct grub_biosdisk_drp *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
+ grub_dprintf ("biosdisk", "%s: int13 version=%u\n", disk->name, version);
/* Clear out the DRP. */
grub_memset (drp, 0, sizeof (*drp));
drp->size = sizeof (*drp);
- if (! grub_biosdisk_get_diskinfo_int13_extensions (drive, drp))
+ if (! (ret = grub_biosdisk_get_diskinfo_int13_extensions (drive, drp)))
{
+ grub_dprintf ("biosdisk", "%s: DRP size=%u flags=%x c=%u h=%u s=%u t=%"
+ PRIuGRUB_UINT64_T " bpi=%u\n",
+ disk->name, drp->size, drp->flags, drp->cylinders, drp->heads,
+ drp->sectors, drp->total_sectors, drp->bytes_per_sector);
+
data->flags = GRUB_BIOSDISK_FLAG_LBA;
if (drp->total_sectors)
@@ -394,16 +403,22 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
disk->log_sector_size++);
}
}
+ else
+ grub_dprintf ("biosdisk", "%s: int13 get ext failed %x\n", disk->name, ret);
}
+ else
+ grub_dprintf ("biosdisk", "%s: int13 check ext failed\n", disk->name);
}
if (! (data->flags & GRUB_BIOSDISK_FLAG_CDROM))
{
- if (grub_biosdisk_get_diskinfo_standard (drive,
+ if ((ret = grub_biosdisk_get_diskinfo_standard (drive,
&data->cylinders,
&data->heads,
- &data->sectors) != 0)
+ &data->sectors)) != 0)
{
+ grub_dprintf ("biosdisk", "%s: get_diskinfo failed %x\n", disk->name, ret);
+
if (total_sectors && (data->flags & GRUB_BIOSDISK_FLAG_LBA))
{
data->sectors = 63;
@@ -419,6 +434,9 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
return grub_error (GRUB_ERR_BAD_DEVICE, "%s cannot get C/H/S values", disk->name);
}
}
+ else
+ grub_dprintf ("biosdisk", "%s: C/H/S=%lu/%lu/%lu\n", disk->name,
+ data->cylinders, data->heads, data->sectors);
if (data->sectors == 0)
data->sectors = 63;
@@ -461,6 +479,7 @@ grub_biosdisk_rw (int cmd, grub_disk_t disk,
unsigned segment)
{
struct grub_biosdisk_data *data = disk->data;
+ int ret;
/* VirtualBox fails with sectors above 2T on CDs.
Since even BD-ROMS are never that big anyway, return error. */
@@ -501,19 +520,37 @@ grub_biosdisk_rw (int cmd, grub_disk_t disk,
disk->name);
}
else
- if (grub_biosdisk_rw_int13_extensions (cmd + 0x42, data->drive, dap))
+ if ((ret = grub_biosdisk_rw_int13_extensions (cmd + 0x42, data->drive, dap)))
{
+ grub_dprintf ("biosdisk", "%s: ext sec=%" PRIuGRUB_UINT64_T " size=%"
+ PRIuGRUB_SIZE " ret=%u\n",
+ disk->name, sector, size, ret);
+
/* Fall back to the CHS mode. */
data->flags &= ~GRUB_BIOSDISK_FLAG_LBA;
disk->total_sectors = data->cylinders * data->heads * data->sectors;
return grub_biosdisk_rw (cmd, disk, sector, size, segment);
}
+ else if (!(data->flags & GRUB_BIOSDISK_FLAG_DPRINT))
+ {
+ grub_dprintf ("biosdisk", "%s: ext sec=%" PRIuGRUB_UINT64_T " size=%"
+ PRIuGRUB_SIZE "\n",
+ disk->name, sector, size);
+ data->flags |= GRUB_BIOSDISK_FLAG_DPRINT;
+ }
}
else
{
unsigned coff, hoff, soff;
unsigned head;
+ if (!(data->flags & GRUB_BIOSDISK_FLAG_DPRINT))
+ {
+ grub_dprintf ("biosdisk", "%s: legacy sec=%" PRIuGRUB_UINT64_T " size=%"
+ PRIuGRUB_SIZE "\n",
+ disk->name, sector, size);
+ data->flags |= GRUB_BIOSDISK_FLAG_DPRINT;
+ }
/* It is impossible to reach over 8064 MiB (a bit less than LBA24) with
the traditional CHS access. */
if (sector >
diff --git a/include/grub/i386/pc/biosdisk.h b/include/grub/i386/pc/biosdisk.h
index 3d80716..fa0862f 100644
--- a/include/grub/i386/pc/biosdisk.h
+++ b/include/grub/i386/pc/biosdisk.h
@@ -24,6 +24,7 @@
#define GRUB_BIOSDISK_FLAG_LBA 1
#define GRUB_BIOSDISK_FLAG_CDROM 2
+#define GRUB_BIOSDISK_FLAG_DPRINT 4
#define GRUB_BIOSDISK_CDTYPE_NO_EMUL 0
#define GRUB_BIOSDISK_CDTYPE_1_2_M 1
--
tg: (0d663b5..) t/biosdisk (depends on: master)
_______________________________________________
Grub-devel mailing list
Grub-devel@gnu.org
https://lists.gnu.org/mailman/listinfo/grub-devel
