[CentOS] WinXP don't boot

> Try:
> 	title Windows XP
> 		map (hd0) (hd1)
> 		map (hd1) (hd0)
> 		rootnoverify (hd1,0)
> 		chainloader +1
>
> Works for me.

Also for me. It was the solution, but I don't understant exactly why.

According the GRUB manual and RHEL knowledge database article
(http://kbase.redhat.com/faq/FAQ_43_4053.shtm):

" The next two lines /map (hd1) (hd0), map (hd0) (hd1)/ use the disk
swapping technique, because that O/S cannot boot from any disks but the
first one. This performs a "virtual" swap between your first and second
hard drive."

In my system:

[root at seth ~]# fdisk -l

Disco /dev/hdb: 40.0 GB, 40020664320 bytes
255 cabezas, 63 sectores/pista, 4865 cilindros
Unidades = cilindros de 16065 * 512 = 8225280 bytes

Disposit. Boot      Start         End      Blocks   Id  System
/dev/hdb1   *           1        4865    39078081   83  Linux

Disco /dev/sda: 160.0 GB, 160041885696 bytes
255 cabezas, 63 sectores/pista, 19457 cilindros
Unidades = cilindros de 16065 * 512 = 8225280 bytes

Disposit. Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1       10445    83891399    7  HPFS/NTFS
/dev/sda2           10446       10476      249007+  83  Linux
/dev/sda3           10477       19203    70099627+  83  Linux
/dev/sda4           19204       19457     2040255   82  Linux swap

And AFAIK the /dev/sda is primary disk and /dev/hdb is slave disk, so
the reason why it didn't run isn't clear.
Maybe I'm wrong about the disks disposition... perhaps I have to open
box case and confirm it...






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