This was originally reported in Red Hat's bugzilla as
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=65034 by
[EMAIL PROTECTED]
To quote the original bug report
"""
The version of grub included with RH 7.3 won't boot windows NT 4.0 SP3
on my system. NT boot fails with bluescreen "INACCESSIBLE_BOOT_DEVICE".
Before upgrade to RH 7.3 my system worked fine as a triple boot setup:
/dev/sda1 WinNT; /dev/sda2 Win95; /dev/sda3 RH Linux. Before upgrade
system was running RH 7.0 and triple boot with Lilo was working fine.
Research on web indicated that WinNT expects bootstrap loader to begin
with a CLI instruction. Checking grub sources shows it starts with a JMP
followed by a CLI. Solution: Change 1st instruction to a CLI, remove a
NOP and JMP to main part of bootstrap code. Rebuild and reinstall grub.
Tested on my triple boot system and a normal single boot RH 7.3 system
and works.
"""
The reporter attached the following patch which says improves the
situation for them. Any comments?
Thanks,
Jeremy
--- grub-0.91/stage1/stage1.S.orig Wed May 15 16:51:40 2002
+++ grub-0.91/stage1/stage1.S Wed May 15 16:52:56 2002
@@ -53,8 +53,8 @@
* parameter block.
*/
+ cli /* NT requires this to be the first instruction */
jmp after_BPB
- nop /* do I care about this ??? */
/*
* This space is for the BIOS parameter block!!!! Don't change
@@ -105,7 +105,6 @@
after_BPB:
/* general setup */
- cli /* we're not safe here! */
/*
* ljmp to the next instruction because some bogus BIOSes
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