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To boot from a logical volume you must use an initrd. Use lvmcreate_initrd to |
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make it. Also make sure your kernel supports ramdisks and the default size is |
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large enough. More details here: |
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http://www.the-infinite.org/archive/docs/lvm/howto-boot-off-root-lv.txt |
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|
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-Andy |
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|
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Quoting Thomas Smith <tom@××××××××××××××.org>: |
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> I'm having a problem with LVM after rebooting my stage3 install of |
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> Gentoo. Here's the filesystem layout: |
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> |
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> /dev/md0 - RAID1 - /dev/hda1 & /dev/hdb1 - /boot |
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> /dev/md1 - RAID0 - /dev/hda2 & /dev/hdb2 - / & swap |
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> VG - vgroot |
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> LV - /dev/vgroot/swap & /dev/vgroot/root |
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> |
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> RAID & LVM are compiled into the Kernel (no modules). I also emerged |
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> (after chroot-ing to /mnt/gentoo) lvm-user, the LVM user-space tools, |
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> and created an initrd files for booting / from LVM. |
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> |
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> The problem occurs when the Kernel runs vgscan during boot. Here's the |
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> error: |
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> |
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> “vgscan -- reading all physical volumes (this may take a while...) |
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> cdrom: open failed. |
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> vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created |
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> vgscan -- WARNING: This program does not do a VGDA backup of your volume |
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> group |
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> |
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> vgchange -- no volume groups found |
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> |
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> VFS: Cannot open root device "vgroot/root" or 00:00 |
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> Please append a correct "root=" boot option |
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> Kernel panic: VFS: Unable to mount root fs on 00:00" |
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> |
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> I've confirmed that the RAID devices are properly loading from the |
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> output during boot. |
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> |
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> Ideas? |
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> |
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> |
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------------------------------------------------- |
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