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gentoo_fragen
n00b
Joined: 18 Jan 2007
Posts: 4
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 Posted: Sat Jan 20, 2007 1:45 pm Post subject: [solved] Boot with/without USB disks attached: genkernel,... |
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Hello!
First the program versions:
genkernel-3.4.5-r1
udev-103
gentoo-sources-2.6.18-r6
grub-0.97-r3
I would like to use the links created by udev for my harddisk within the booting process, e.g.
/dev/disk/by-id/scsi-SATA_ST3250824AS_XXXXXXXX-part7
grub.conf:
| Code: |
# For booting GNU/Linux
title Gentoo Linux 2.6.18-r6-udev
root (hd0,5)
kernel /boot/kernel-genkernel-x86-2.6.18-gentoo-r6 init=/linuxrc root=/dev/ram0 ramdisk=8192 real_root=/dev/disk/by-id/scsi-SATA_ST3250824AS_XXXXXXXX-part7 udev vga=extended
initrd /boot/initramfs-genkernel-x86-2.6.18-gentoo-r6
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instead of:
| Code: | kernel /boot/kernel-genkernel-x86-2.6.18-gentoo-r6 init=/linuxrc root=/dev/ram0 ramdisk=8192 real_root=/dev/sda7 udev vga=extended
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Now it seems that udev is not included in the initramfs created by genkernel.
The reason for trying this is: If I attach a USB stick or harddisk before booting, the naming of the devices for the different harddisk gets mixed up: The USB disk is now /dev/sda instead of the SATA harddisk.
How can I get this configuration to work?
Thanks for your help!
Last edited by gentoo_fragen on Wed Jan 24, 2007 11:40 am; edited 1 time in total |
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gentoo_fragen
n00b
Joined: 18 Jan 2007
Posts: 4
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| Posted: Tue Jan 23, 2007 11:45 pm Post subject: [solved] real_root=LABEL=/ instead of udev |
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The solution is using real_root=LABEL=/ in grub.conf
udev is not needed.
First attach a label (e.g. "/") to the root disk:
e2label /dev/sda7 /
Then change the grub.conf:
| Code: |
kernel /boot/kernel-genkernel-x86-2.6.18-gentoo-r6 init=/linuxrc root=/dev/ram0 ramdisk=8192 real_root=LABEL=/ udev vga=extended
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genkernel has to be called with the option:
--disklabel
Unfortunately this option is not mentioned in the man page. With genkernel --help you get:
--disklabel Include disk label and uuid support in your initrd
http://gentoo-wiki.com/HOWTO_Initramfs states that this should not work!?! |
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desultory
Bodhisattva
Joined: 04 Nov 2005
Posts: 9410
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| Posted: Wed Jan 24, 2007 4:32 am Post subject: |
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If the wiki is incorrect and the functionality does in fact work, flag it. Or, if you can, check whether the description matches current releases and make a note about known working versions.
Also, to flag a topic [solved], edit the topic head post and add it to the subject. |
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