2007/9/25, Mikkel L. Ellertson <mikkel@xxxxxxxxxxxxxxxx>: > antonio montagnani wrote: > > 2007/9/25, Mikkel L. Ellertson <mikkel@xxxxxxxxxxxxxxxx>: > >> If you are booting the USB drive directly from the BIOS, then you > >> are going to have a problem with this. When you boot that way, the > >> USB hard drive becomes hd0 instead of hd1. Your laptop hard drive > >> becomes hd1 instead of hd0. So you have to change all the hd > >> references to reflect this. You may also want to change device.map > >> to reflect this. > >> > >> > > Tnx Mikkel for the help > > > > device map is like this??? > > > > (hd0) /dev/sda > > (hd1) /dev/sdb > > > > where sdb is the internal disk and sda is the USB disk. > > > > Tnx > > > It looks good to me. One thing I forgot to mention - make sure you > change the setting for the splash screen as well. Otherwise grub > tries to load it from the wrong drive and errors out. (I forgot > once.) You then get the grub> prompt, and wounder why. > splashimage=(hd0,0)/grub/splash.xpm.gz is it correct??? > You may also want to back up the mbr of your laptop hard drive > before running grub-install. If you goof, you can end up with a > system that will only boot with the USB drive installed. I use > something like "dd if=/dev/sda of=/root/save/sda.mbr count=1". > > > -- > I want to install grub on my USB disk, in order to start up any laptop and in order not to srew my Vista system. I think that I have to issue grub-install /dev/sda where sda is my USB disk and after booting from my CD. tnx for patience. -- Antonio Skype : antoniomontag
