Friday, May 2, 2014
How to fix "invalid EFI file path" from dual boot EFI Windows 8 and CentOS
Problem : When trying to dual boot to Windows 8, "invalid EFI file path" error is displayed
Reason : CentOS grub did not find Windows 8 EFI correctly
File needs to be modified : /boot/efi/EFI/redhat/grub.conf
Before :
title Other
rootnoverify (hd0,4)
chainloader +1
After :
title Windows 8
root (hd0,1)
chainloader /EFI/Microsoft/Boot/bootmgfw.efi
Although (hd0,4) is where Windows 8 located (/dev/sdb5) , we should put where the file EFI/Microsoft/Boot/bootmgfw.efi is located. (hd0,1) is where bootmgfw.efi is located (/dev/sdb2)
After grub.conf is modified, it will boot fine.
[root@novo etc]# df -k /boot/efi
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sdb2 262144 29488 232656 12% /boot/efi
[root@novo efi]# ls -ld /boot/efi/EFI/Microsoft/Boot/bootmgfw.efi
-rwx------. 1 root root 1616728 Feb 22 10:44 /boot/efi/EFI/Microsoft/Boot/bootmgfw.efi
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Wish I'd found this post earlier as I had been scratching my head for several hours with a Windows Server 2012R2 / CentOS 6.5 dual boot setup on a 6TB HDD in a test/support environment.
ReplyDeleteI understand your pain. I also scratched my head for hours searching high and low. I am glad it helped!
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