HI �橇�, I think you are right. My OS is Ubuntu 9.10 and GRUB is 1.97 beta. :)
在 2010年10月1日 下午11:51，Goh Lip <[email protected]> 写道： > On Friday 01,October,2010 11:06 PM, Dennis Cao wrote: >> hi, �橇� >> Thanks a lot for your help :) >> >> You are right, my usb disk is (hd0,1) if I choose boot from USB Hard >> Disk in BIOS. If I choose to boot from hard disk, the usb disk is >> (hd1,1). The grub.cfg in usb disk has: >> set root=(hd0,1) >> search --no-floppy --fs-uuid --set 119b5aaf-7d23-45d7-bcb8-b6b94a5eb238 >> May I ask what env variable root is used for by grub? >> >> I tried these commands in grub command line after booting from usb disk: >> grub>echo $root >> hd1,8 >> grub>set root=(hd0,1) >> grub>ls / >> boot, grub, ... >> >> It shows that after executing command 'set root=(hd0,1)', root >> directory '/' is set to disk (hd0,1). But in this disk, I just create >> a folder 'boot', why a folder named 'grub' is created here? >> >> As for the grub-mkrescue command, the syntax may be in Grub 1.97beta: >> grub-mkrescue grub-rescue.iso :) >> >> >> >> >> NOTE: >> commands used to install grub to usb disk: >> $ sudo grub-install /dev/sdb1 >> $ mount /dev/sdb1 /media/usb01 >> $ cd /media/usb01 >> $ mkdir -p ./boot/grub >> $ cp -dpR /boot/grub/* ./boot/grub >> (edit /media/usb01/boot/grub/grub.cfg as mentioned above) >> >> >> ----- >> Cao, Guilin > > Cao, 你好, command "grub-mkrescue grub-rescue.iso" is for older > versions of grub2; what OS and version are you using? A slightly newer > version uses "--overlay" and the newest version requires you to add > "--output". But nevermind, if it works, so be it. :) > > Why the need for the folder 'grub' in 'boot'? - I guess that's how the > OS boot was created and when we "grub-install --root-directory", it > copies it there. > > The commands you used was about how I created an old grub-legacy > dedicated partition and I would think it will work too with grub2. But I > personally think with the easier shortcuts now available for grub2, it > will not be necessary. But, again, if it works and you are comfortable > with it, so be it. > > Good luck, Cao and best wishes. - Goh Lip > > -- > Nice place, Guilin; my wife visited there about 5 times. > Me? I've never been to China. :( > > _______________________________________________ > Help-grub mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/help-grub > -- --------------------------------- 曹贵林 ( Dennis Cao ) _______________________________________________ Help-grub mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-grub
