Re: [linux-lvm] LVM on root, Kernel panic: "I have no root and I must scream"

[AJ Lewis <lewis@sistina.com>]

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On Fri, Apr 27, 2001 at 02:39:12PM -0700, Day, Evan wrote:
> I hosed things up good at lunch and started a reinstall before I went back
> to work.  I'll finish it up as soon as I get home and see what I can come up
> with.  The only thing I see different in your linuxrc is the raidstart -a.
> I'm not doing that, and didn't think it would be necessary (my RAIDS are
> type fd in the partmap and have persistent-superblock 1 in /etc/raidtab).
> 
> Except for using GRUB instead of LILO (and kernel modules for raid/lvm), my
> setup looks almost identical to yours.  I'm not using devfs, but that
> shouldn't matter.

I have seen problems with GRUB that are fixed by using LILO.  I'm not sure
what the issues are.  GRUB seems to be a lot more touchy though.  Have you
tried using LILO?

> What I really don't get is that I can put a mount /dev/vg00/lvol1 in
> /linuxrc and it mounts!  I can also boot with a root of /dev/sda2 (old root
> partition), with /etc/fstab pointing / at /dev/vg00/lvol1 (from sda2) and it
> mounts okay.
> 
> I'll have to see if I can run a serial cable from the linux machine to
> another PC to capture logs.
> 
> Thanks for the help
> -Evan
> 
> -----Original Message-----
> From: Luca Berra [mailto:bluca@comedia.it]
> Sent: Friday, April 27, 2001 2:12 PM
> To: 'linux-lvm@sistina.com'
> Subject: Re: [linux-lvm] LVM on root, Kernel panic: "I have no root and
> I must scream"
> 
> 
> On Fri, Apr 27, 2001 at 01:48:23PM -0700, Day, Evan wrote:
> > I've tried both setting root=/dev/vg00/lvol1 and root=0x3a00 - neither
> > worked.  I'm probably just going to put / as the first device (including
> > /boot) on RAID-1 and make the rest of the system LVM.  I've spent too many
> > days trying to make root on LVM work and I need my system back...
> > 
> can you send me some more details on what happens,
> a log would be great if you can log on a serial device
> 
> it *should* work
> 
> here is what i have (i dun use lvmcreate_initrd)
> 
> [vc/2]bluca@Moskowskaya:~% df
> /dev/vg01/lvol1         253920     60104    180712  25% /
> /dev/md/0                29621     10798     17294  38% /boot
> /dev/vg01/lvol3        2064208   1675988    283364  86% /usr
> /dev/vg01/lvol4         507848    255632    226004  53% /var
> /dev/vg01/lvol5         253920      9428    231388   4% /tmp
> /dev/vg01/lvol6        2064208   1673716    285636  85% /opt
> /dev/vg01/lvol7        4128448   3137540    781196  80% /home
> 
> [vc/3]root@Moskowskaya:~# cat /etc/lilo.conf
> boot = /dev/md/0
> timeout = 50
> prompt
> root = 0x3a00 #/dev/vg01/lvol1
> read-only
> map = /boot/map
> install=/boot/boot.b
> default = linux
> optional
> append = "panic=60 devfs=symlinks video=tdfx:800x600-32@72
> root=/dev/vg01/lvol1"
> vga=normal
> restricted
> 
> image = /boot/vmlinuz-2.4.3-ac3
> label = 243ac3
> initrd = /boot/initrd-2.4.3-ac3
> alias = linux
> 
> [vc/3]root@Moskowskaya:~# cat /boot/initrd-source/linuxrc
> #!/bin/sh -x
> mount -t proc /proc /proc
> echo "" > /proc/sys/kernel/modprobe
> insmod -k /lib/modules/*/kernel/drivers/scsi/aic7xxx/aic7xxx.o
> aic7xxx=verbose
> insmod -k /lib/modules/*/kernel/drivers/md/raid1.o
> insmod -k /lib/modules/*/kernel/drivers/md/xor.o
> insmod -k /lib/modules/*/kernel/drivers/md/raid5.o
> raidstart -a
> vgchange -a y
> sulogin -t 10
> umount /proc
> 
> [vc/3]root@Moskowskaya:~# find /boot/initrd-source -type f
> /boot/initrd-source/bin/BusyBox
> /boot/initrd-source/bin/insmod
> /boot/initrd-source/bin/raidstart
> /boot/initrd-source/bin/sulogin
> /boot/initrd-source/bin/vgchange
> /boot/initrd-source/bin/vgscan
> /boot/initrd-source/etc/lvmtab.d/vg01
> /boot/initrd-source/etc/passwd
> /boot/initrd-source/etc/raidtab
> /boot/initrd-source/lib/ld-linux.so.2
> /boot/initrd-source/lib/libc.so.6
> /boot/initrd-source/lib/libcrypt.so.1
> /boot/initrd-source/lib/liblvm-11.so.0
> /boot/initrd-source/lib/modules/2.4.3-ac3/kernel/drivers/block/floppy.o
> /boot/initrd-source/lib/modules/2.4.3-ac3/kernel/drivers/md/raid1.o
> /boot/initrd-source/lib/modules/2.4.3-ac3/kernel/drivers/md/raid5.o
> /boot/initrd-source/lib/modules/2.4.3-ac3/kernel/drivers/md/xor.o
> /boot/initrd-source/lib/modules/2.4.3-ac3/kernel/drivers/scsi/aic7xxx/aic7xx
> x.o
> /boot/initrd-source/lib/modules/2.4.3-ac3/kernel/drivers/scsi/sym53c8xx.o
> /boot/initrd-source/lib/modules/2.4.3-ac3/kernel/fs/reiserfs/reiserfs.o
> /boot/initrd-source/linuxrc
> 
> L.
> 
> -- 
> Luca Berra -- bluca@comedia.it
>         Communication Media & Services S.r.l.
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-- 
AJ Lewis
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1313 5th St SE, Suite 111              Fax:    612-379-3952
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