How can I install Grub to /dev/sda1
I have formatted a 3.5" 20GB ide hard disk mounted in a USB caddy with seven partitions:
sda1: boot 32M
sda2: swap 512M
sda4 ext - sda5 1G; sda6 1G; sda7 12.5G
All save swap have been formatted ext2 and I want to try and make my thinkpad and dell be able to boot off this disk.
I tried to install grub to this device but it will not recognise the drive number
I tried things like
no go ...
I wonder if this can actually be done this way - I have been reading a bit on how to make a USB boot disk and things still don't quite add up.
First step I would like is just to have grub command line so I can use this disk as a rescue and recovery disk - eventually with its own mini kernel and some tools etc...
I have rebooted to sus out the BIOS options more fully and find that if I select the USB HDD option at boot I get a grub command line!
I will try too boot to my existing HDD partitions/root from that just to confirm that what I am trying to do is possible.
I got errors about drive number when I tried to install grub though - so I am confused - this drive was just formatted so there is no grub on it (surely it is not hung over from a previous partitioning and multiboot exercise - could the mbr still have that original grub installed on it?)
Because when the last install was on this drive it had been in a laptop.
It would seem that the ThinkPad has no trouble allowing booting from USB drives but will a kernel panic when it tries to load its own USB drivers (/??) much more reading I am guessing - anyone know a tried and trusted way to do this/
Grub supports tab completition, so just type "root (" then <tab> - it'll tell you what it can see. Same applies to "setup", which I think you should be using instead of "install".
Quote from the grub manual re "install";
"This command is fairly complex, and you should not use this command unless you are familiar with GRUB. Use setup (see setup) instead."
As for booting a kernel off it, I'd guess you'd need an initrd/initram. Haven't done it, so hopeffully someone else can tell you for sure.
First you have to tell grub which device you want to work with::
grub> device (hd0) /dev/sda1
Then you can do root (....
And yes, syg00 is correct, use setup, not install.
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