=================== BUG #565: LATEST MODIFICATIONS ==================
http://savannah.gnu.org/bugs/?func=detailbug&bug_id=565&group_id=68
Changes by: Yoshinori K. Okuji <[EMAIL PROTECTED]>
Date: 2002-Jun-13 07:35 (GMT)
------------------ Additional Follow-up Comments ----------------------------
Thanks for your info. That seems to be quite strange.
Next, could you try a later version? 0.90 is very old.
It would be better to get the latest source tree from
the CVS, because any fix is done in the CVS anyway.
If the same problem still occurs, could you test where
the error is emitted? I think it is somewhere in the
function "load_image" in the file "stage2/boot.c".
You can test that by adding something like this:
grub_printf("%s:%d: errnum = %d\n",
__FILE__, __LINE__, errnum);
Thanks,
Okuji
=================== BUG #565: FULL BUG SNAPSHOT ===================
Submitted by: chrispe Project: grub
Submitted on: 2002-Jun-08 16:41
Category: Booting Severity: Major
Priority: None Bug Group: Software Error
Resolution: None Assigned to: None
Status: Open Release: 0.90
Reproducibility: Every Time Planned Release:
Summary: kernel command returns error 18 when grub loads from ntldr.
Original Submission: I'm trying to load Linux from the Win2k bootloader (NTLDR), via
Grub.
I installed grub stage1 onto a floppy using the following commands:
grub> root (hd1,4)
grub> setup (fd0)
grub> quit
setup found my grub files, failed to embbed stage 1.5 and used the following install
command:
install /boot/grub/stage1 d (fd0) /boot/grub/stage2 p /boot/grub/menu.lst
This boot floppy successfully boots, runs stage2, pops up the graphical menu, with a
splash screen and boots Linux from (hd1,4)/bzImage.
Next, I copied this working grub stage 1 from the floppy to my Windows C drive (using
dd) and set up C:\boot.ini to run it from NTLDR.
Grub runs okay from NTLDR and successfully loads stage2, pops up the graphical menu,
with a splash screen, but fails to boot Linux from (hd1,4)/bzImage with error 18.
This seems strange. How come it can't load bzImage, when it can load the menu & splash
screen just fine from the same partition?
I used the testload command on (hd1,4)/bzImage and it worked fine (the numbers at the
end matched). However, when I execute the kernel command, I get error 18...
grub> kernel (hd1,4)/bzImage root=/dev/hdb7
Error 18: Selected cylinder exceeds max supported by BIOS
I can't find any differences between booting from the floppy MBR & from NTLDR. The
geometry command returns the same numbers, testload returns the same numbers. It is
just that the kernel command fails in the NTLDR case.
Chris.
Follow-up Comments
*******************
-------------------------------------------------------
Date: 2002-Jun-13 07:35 By: okuji
Thanks for your info. That seems to be quite strange.
Next, could you try a later version? 0.90 is very old.
It would be better to get the latest source tree from
the CVS, because any fix is done in the CVS anyway.
If the same problem still occurs, could you test where
the error is emitted? I think it is somewhere in the
function "load_image" in the file "stage2/boot.c".
You can test that by adding something like this:
grub_printf("%s:%d: errnum = %d\n",
__FILE__, __LINE__, errnum);
Thanks,
Okuji
-------------------------------------------------------
Date: 2002-Jun-12 21:30 By: chrispe
Hi Okuji,
Thanks for looking at my problem. Here is the data you asked for...
"geometry (hd1)" from floppy & NTLDR. They are identical.
drive 0x81: C/H/S = 1023/255/63, The number of sectors = 60036480, LBA
Partition num: 0, Filesystem type unknown, partition type 0x7
Partition num: 4, Filesystem type is ext2fs, partition type 0x83
Partition num: 5, Filesystem type unknown, partition type 0x82
Partition num: 6, Filesystem type is ext2fs, partition type 0x83
"blocklist (hd1,4)/bzImage" from floppy.
(hd1,4)538+24,564+512,1080+512,1594+512,2108+251
"debug", then "kernel (hd1,4)/bzImage" from NTLDR.
Debugging is on.
Error 18: Selected cylinder exceeds maximum supported by BIOS
Turning debug on didn't make the kernel command come out with any extra messages. You
didn't ask for the blocklist command in the NTLDR case, but it return the same result.
The only difference is that the kernel command produces that error in the NTLDR case.
I'm a software engineer. If you want me to instrument the code for extra debugging,
I'm willing.
Regards,
Chris.
-------------------------------------------------------
Date: 2002-Jun-12 11:45 By: okuji
Could you show me results when executing these:
1) Run "geometry (hd1)" when booting GRUB from a floppy.
2) Run "geometry (hd1)" when booting GRUB from NTLDR.
3) Run "blocklist (hd1,4)/bzImage" when booting GRUB from
a floppy.
4) Run "debug" and "kernel (hd1,4)/bzImage" when booting
GRUB from NTLDR.
Thanks,
Okuji
No files currently attached
For detailed info, follow this link:
http://savannah.gnu.org/bugs/?func=detailbug&bug_id=565&group_id=68
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