[CentOS] problem configuring grub for a dual-boot

Thu Aug 8 10:04:45 UTC 2013
Vanhorn, Mike <michael.vanhorn at wright.edu>

I tried the suggestion of swapping the disks assignments:

>Try telling grub to swap the disks:
>>  title Windows 7
>map (hd1) (hd0)
>map (hd0) (hd1)
>>  rootnoverify (hd1,0)
>>  chainloader +1

But that still just gets me

 invalid EFI file path
 Error 1: Filename must be either an absolute pathname or blocklist

I think that my failing is something to do with grub and EFI. In the
anaconda-generated  grub.conf file, there is a line that reads

 device (hd0) HD(1,800,64000,9b55c4a9-fdbe-4fcd-857b-8e7e129e29f9)

I have no idea where that UUID came from, as both blkid and ls -l
/dev/disk/by-uuid do not have entries for the disks themselves, just for
the partitions. Maybe that isn't even a UUID. At any rate, I'm wondering
if there should be a similar entry for the other disk in the system.

Mike VanHorn
Senior Computer Systems Administrator
College of Engineering and Computer Science
Wright State University
265 Russ Engineering Center
michael.vanhorn at wright.edu