Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #211665

Re: Can Grub Boot Through a USB Port on an Old PC?

Show all headers | View raw

Le 23/07/2019 à 04:53, Martin McCormick a écrit :
> The PC is old enough that it can not natively boot via a serial
> port but it might if grub knew about the bootable drive sitting
> in one of the ports.

Do you mean that GRUB is installed on an internal drive ?
By default, GRUB relies on the BIOS disk services to access drives. But 
it also has native ATA and USB drivers which are not loaded by default. 
See the 'nativedisk' command.

Be aware that loading native drivers switches GRUB to a new different 
world : BIOS drives (hdX) will not be available any more and environment 
variables pointing at drives such as $root and $prefix will need to be 
updated with native drive names (ataX, usbX...).

Also, note that chainloading a bootloader (boot sector or ntldr) which 
relies on BIOS disk services will not work. Loading a kernel and 
initramfs should work if they include native USB drivers.

Back to linux.debian.user | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Can Grub Boot Through a USB Port on an Old PC? "Martin McCormick" <martin.m@suddenlink.net> - 2019-07-23 05:00 +0200
  Re: Can Grub Boot Through a USB Port on an Old PC? David Christensen <dpchrist@holgerdanske.com> - 2019-07-23 05:10 +0200
  Re: Can Grub Boot Through a USB Port on an Old PC? Patrick Bartek <nemommxiv@gmail.com> - 2019-07-23 05:40 +0200
  Re: Can Grub Boot Through a USB Port on an Old PC? Pascal Hambourg <pascal@plouf.fr.eu.org> - 2019-07-23 07:20 +0200
    Re: Can Grub Boot Through a USB Port on an Old PC? "Martin McCormick" <martin.m@suddenlink.net> - 2019-07-23 17:40 +0200
      Re: Can Grub Boot Through a USB Port on an Old PC? Brian <ad44@cityscape.co.uk> - 2019-07-23 18:40 +0200
      Re: Can Grub Boot Through a USB Port on an Old PC? Pascal Hambourg <pascal@plouf.fr.eu.org> - 2019-07-23 20:30 +0200
        Re: Can Grub Boot Through a USB Port on an Old PC? Pascal Hambourg <pascal@plouf.fr.eu.org> - 2019-07-23 20:40 +0200
        Re: Can Grub Boot Through a USB Port on an Old PC? "Martin McCormick" <martin.m@suddenlink.net> - 2019-07-23 23:40 +0200
        Re: Can Grub Boot Through a USB Port on an Old PC? "Martin McCormick" <martin.m@suddenlink.net> - 2019-07-25 19:40 +0200
          Re: Can Grub Boot Through a USB Port on an Old PC? Andrei POPESCU <andreimpopescu@gmail.com> - 2019-07-25 20:20 +0200
            Re: Can Grub Boot Through a USB Port on an Old PC? Tixy <tixy@yxit.co.uk> - 2019-07-25 21:30 +0200
              Re: Can Grub Boot Through a USB Port on an Old PC? "Martin McCormick" <martin.m@suddenlink.net> - 2019-07-26 04:30 +0200
                Re: Can Grub Boot Through a USB Port on an Old PC? Tixy <tixy@yxit.co.uk> - 2019-07-26 09:50 +0200

csiph-web