> 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... -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 251 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20070116/1883a6fa/attachment-0005.sig>