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tenspd137
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Joined: 22 Aug 2006
Posts: 391
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 Posted: Sat May 03, 2008 9:54 pm Post subject: root=LABEL={something} in Grub [SOLVED] |
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I was wondering if anyone knows how to get grub to recognize labels on disks? For example, I have an older workstation that uses SCSI disks, so when I use the install cd, the system sees them as /dev/sd[ef]. I have assigned the labels using tune2fs -L to use because when I reboot, the kernel sees them as /dev/sd[ab]. I have the following set up:
/dev/sda1 - labe is BOOT
/dev/sda3 - label is ROOT
/dev/sdb1 - label is SPARE1
and in fstab
| Code: |
...
LABEL=BOOT /boot ext3 defaults,noatime 1 2
LABEL=ROOT / ext3 noatime 0 1
LABEL=SPARE1 /spare1 ext3 defaults 0 1
...
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After fixing the device.map in /boot/grub
| Code: |
(hd0) /dev/sda
(hd1) /dev/sdb
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In my grub.conf,
| Code: |
title Gentoo Linux 2.6.24-r7
root (hd0,0)
kernel /boot/kernel-2.6.24-gentoo-r7 root=LABEL=ROOT
....
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The kernel panics with
VFS: Cannot open root device "LABEL=ROOT" or unknown block(2,0)
but
kernel /boot/kernel-2.6.24-gentoo-r7 root=/dev/sda3
works fine
Can I get it to accept a label? I only want to do this because I have had the unfortunate problem of disks breaking in multi disk systems, so when they are removed, all the drives are relabeled new /dev/sdX designations.
Just a question, not an emergency - thanks for any answers!
Last edited by tenspd137 on Sun Jun 01, 2008 9:53 pm; edited 1 time in total |
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yabbadabbadont
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Joined: 14 Mar 2003
Posts: 4791
Location: 2 exits past crazy
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| Posted: Sat May 03, 2008 11:04 pm Post subject: |
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Try using UUID instead and see if it works. You will, of course, need to get the UUID of your root partition. An easy way is to look in /dev/disk/by-uuid.
Here is mine as an example: | Code: | /home/daffy $ ls -l /dev/disk/by-uuid/
total 0
lrwxrwxrwx 1 root root 10 2008-05-03 15:45 0b1639fd-e7c6-4a2f-a163-3258ce26dc8b -> ../../sda7
lrwxrwxrwx 1 root root 10 2008-05-03 15:45 0c400f84-71f7-4faf-8229-39417ef34b39 -> ../../hda4
lrwxrwxrwx 1 root root 10 2008-05-03 15:45 174c42d0-10cd-436d-aa0d-d94bbe062a3e -> ../../hda3
lrwxrwxrwx 1 root root 10 2008-05-03 15:45 2eacc7c6-729a-46a8-a6f9-8cd1b148a411 -> ../../sda6
lrwxrwxrwx 1 root root 11 2008-05-03 15:45 4830c333-6657-4a91-b8b2-551cc88d4fe4 -> ../../sda10
lrwxrwxrwx 1 root root 10 2008-05-03 15:45 53106d93-9666-4fb1-8177-01cb23930d55 -> ../../sda5
lrwxrwxrwx 1 root root 10 2008-05-03 15:45 5c4dce4d-83ee-419b-a770-18fea9c83359 -> ../../sda8
lrwxrwxrwx 1 root root 10 2008-05-03 15:45 5e7ca13e-5fce-4477-a967-68c2213a8d74 -> ../../hda2
lrwxrwxrwx 1 root root 10 2008-05-03 15:45 90B5-E9EB -> ../../hda1
lrwxrwxrwx 1 root root 10 2008-05-03 15:45 ef102bc3-f432-48fc-9bfe-c0fe27cb35fc -> ../../sda9
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In my case, /dev/hda3 is my root partition, so I would configure my grub.conf like so:
| Code: | | kernel /bzImage root=UUID=174c42d0-10cd-436d-aa0d-d94bbe062a3e vga=775 quiet |
Edit: Actually, now that I've thought about it a bit more, I think that it might be the initrd (or initramfs) image that is interpreting the "root=" line. If so, you might be out of luck. |
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tenspd137
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Joined: 22 Aug 2006
Posts: 391
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| Posted: Sun Jun 01, 2008 9:54 pm Post subject: |
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| Sorry - thought I closed this one - I do believe you are right - I don't have an initramfs on this box, which is why I don't think it is working. Thanks for the reply! |
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