Boot USB-stick from grub on hdd.

[RobertDavid]

I have a notebook which is impossible to boot from USB:( and also it has no CDROM permanently so want sometimes boot there from my USB-stick livecd,, My idea is if I could modyfy grub on the notebook to link me on USB (where is also GRUB but it doesnt matter to pass twice grubs), just something like during windows booting?!???
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Arch & Fluxbox & 2.6.24-rc-zen!!!!
robertek.brevnov.net

[NeddySeagoon]

RobertDavid,

Your kernel will have to be on the laptop hard drive. This is because grub uses the BIOS to get started and if the BIOS cannot see the USB stick, neither can grub.

Everything else can be on the USB stick.
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Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

[RobertDavid]

I have realizet that you have right, but there is another problem how to set a root correctly??

My settings is

[NeddySeagoon]

RobertDavid,

If you really want an initrd, that must be on the laptop hard drive too, since its really part of the kernel and is loaded by grub.

The title= line is for you, it puts text into grubs menu
The root (hd... tells wher /boot is, it must be on your hard drive, nou on usB.
The kernel line tells what kernel you want to load.
You will need rootdelay=<secs> at the end of the kernel line, where secs is a time beterrn 7 and 30 seconds to allow the kernel to set up the USB interface, so it can use it to mount root.
The initrd line tells grub to load a file to be used as a fake root filesystem

Since you need to build your own kernel to mount root on USB, you may as well build in everything you need for booting and not bother with the complication of an initrd.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.