Alan McKinnon <[EMAIL PROTECTED]> writes: > 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 >
[...] >> 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 think you are wrong about that. But just a fine point and not central to the problem. For example I know for sure you can use the grub notation at the kernel address like: kernel (hd0,0)/kernel-XXXXXX At least I know for sure it was possible at one time.. I haven't actully used that notation in grub for quite a while. I do have that notation as the address for the splash image in several working grub.confs. (like splashimage=(hd0,0)/grub/splash.xpm.gz) [...] > >> 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 Using your point from above (but as I've posted, in the actual grub.conf I do have a legitimate kernel device appended. The latest attempt brings me to a grub command line as posted so grub.conf didn't work. So to give more meaning-full errors I will list my steps and the output below including a screen shot of the kernel-panic error message At grub prompt: grub> root (hd0.0) (That works and indicates an ext2fs) grub> kernel /kernel-2.6.25-r1 root=/dev/sda3 (This also works as noted by using completion at `/k<tab>') grub> boot In the screen shot provided note that it appears grub is expecting an intramfs and only lists those types of devices, rejecting both (hd0,0) and /dev/sda3. http://www.jtan.com/~reader/vu/disp.cgi > 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. Yes, I fdisked the `virtual' disk into boot=/dev/sda1 root=/dev/sda3 > 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 I'm not really sure about all this, its on a brand new gateway laptop running Vista Home Premium on core 2 dua processor T5550 The system information tool doesn't give the type of harddisk but does shwo goose eggs at a scsi listing... and its very unlikely to be scsi anyway. Device manager doesn't do any better. Under Disk drives it just gives the brand (Western Digital) and the model number: WDC WD2500BEVS-22USTO I don't think that part number is a scsi part number. I don't know any other ways to tell if its Sata or IDE but I think its IDE. I did mention in OP that this intall is inside a vmware machine hosted on Vista Home Premium OS. The `virutal' disk is seen as scsi hence the /dev/sda notations. (Vmware workstation 6.5) In the vmware harware settings its listed as 12 GB scsi disc. My current grub.conf: default 0 timeout 5 splashimage=(hd0,0)/grub/splash.xpm.gz title=kernel-2.6.25-r1-0x31a-1280x1024 root (hd0,0) kernel /kernel-2.6.25-r1 root=/dev/sda3 -- gentoo-user@lists.gentoo.org mailing list
