On Thursday 24 April 2008, [EMAIL PROTECTED] wrote: > So assuming I've made some mistake in grub.conf I try to boot from > grub command line. > > root = (hd0,0) (which is /dev/sda1 in linux terms) > > kernel /kernel-2.6.25-r1
Nope. Kernel needs a root=<device> parameter. It can't know what is your root partition, that info is in fstab and fstab is on the root partition.So you tell it via a parameter > boot > > But it fails with a message saying please append a working root=?? to > the boot commands. expected result. see above. > So reloading the install ISO I mount /mnt/gentoo/boot and edit > grub.conf to say: > > title=kernel-2.6.25-r1 > root (hd0,0) > kernel /kernel-2.6.25-r1 root=/dev/sda3 > > That fails > kernel /kernel-2.6.25-r1 root=/dev/hda3 (Thinking maybe grub > does not understand sda) Nothing to do with grub. It's a kernel boot parameter passed verbatim to the kernel and needs valid kernel device names. What's the error you get? Is (hd0,0) a separate /boot? Does it contain a file called kernel-2.6.25-r1 at the top level? And you also should have a "ro" kernel parameter in there > That Fails > > kernel /kernel-2.6.25-r1 root=(hd0)/sda3 > > Fails Won't work. (hd0) is a grub thing. You need a /dev/sda3 or similar in there > I've even tried: > kernel /kernel-2.6.25-r1 root=(hd0,2) Won't work. Same reason. > And another failure... all with the same message about appending a > working `root=???' > > I'm about out of ideas here. here's a working grub.conf for illustration: default 0 timeout 10 splashimage=(hd0,0)/grub/splash.xpm.gz title Default root (hd0,0) kernel /vmlinuz root=/dev/sda3 ro title Gentoo-2.6.25 root (hd0,0) kernel /vmlinuz-2.6.25-gentoo root=/dev/sda3 ro Seems my setup is identical to yours: /boot on /dev/sda1 aka (hd0,0) to grub / on /dev/sda3 Only difference is the "ro" boot parameter, which shouldn't make a difference - it's there for fsck purposes during start-up. What disk driver and disks do you have? Are you 100% sure you are either using the new ata driver (everything is an sd) or have scsi/sata disks? If your disk is IDE with the old driver, it will be an hd and will require that on the kernel line -- Alan McKinnon alan dot mckinnon at gmail dot com -- gentoo-user@lists.gentoo.org mailing list
