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yalu2
n00b
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Joined: 12 Aug 2007
Posts: 1

PostPosted: Sun Aug 12, 2007 11:25 am    Post subject: root on lvm2: can't find logical volumes Reply with quote

I am trying to install Gentoo on my Sun Ultra5 with the root fs on lvm. Problems arise when I boot the kernel. I built a kernel and initrd with lvm support.

My silo.conf:
Code:

partition=1
root=/dev/mapper/aardbei-root
timeout=50
default=linux
read-only

image = /kernel-genkernel-sparc64-2.6.21-gentoo-r4
        label=linux
        initrd=/initramfs-genkernel-sparc64-2.6.21-gentoo-r4
        append="video=atyfb:off udev root=/dev/ram0 real_root=/dev/aardbei/root init=/linuxrc"



Last messages when it boots:
Code:

>> Loading modules
>> Activating mdev
>> Scanning for Volume Groups
  Reading all physical volumes. This may take a while...
  Found volume group "aardbei" using metadata type lvm2
>> Activating Volume Groups
  0 logical volume(s) in volume group "aardbei" now active
>> Determining root device...
!! Block device /dev/aardbei/root is not a valid root device...
!! the root block device is unspecified or not detected.
   Please specify a device to boot, or "shell" for a shell...
boot() :: _


Also, I can't type "shell" and enter a shell. It seems as if the keyboard is dead. my only option is to power off...
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djscribble
Tux's lil' helper
Tux's lil' helper


Joined: 03 Aug 2005
Posts: 116

PostPosted: Fri Aug 17, 2007 4:39 am    Post subject: Reply with quote

Is your boot partition on your in your vg?? if so, then you have some serious problems (IMHO) however if it is not, then you need to change your initial root= line from /dev/mapper/aardbei-root to be root=/dev/[boot device]
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nixnut
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Joined: 09 Apr 2004
Posts: 10973
Location: the dutch mountains

PostPosted: Fri Aug 17, 2007 5:17 pm    Post subject: Reply with quote

Moved from Installing Gentoo to Gentoo on Sparc.
Sparc stuff, so moved here.
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SStreet
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Joined: 06 Aug 2004
Posts: 11

PostPosted: Tue Aug 28, 2007 3:34 pm    Post subject: Reply with quote

From the looks of the kernel mesages kicked out, specifically:
Quote:
">> Scanning for Volume Groups
Reading all physical volumes. This may take a while...
Found volume group "aardbei" using metadata type lvm2
>> Activating Volume Groups
0 logical volume(s) in volume group "aardbei" now active "


It appears that dm-mod is not in the kernel (perhaps you have it in as a module?) You'll need to rebuild the kernel with that built-in to have root as a lvm managed volume -- though not recommended.

All of my setups on the 3 archs I run (PPC, Sparc64, and x86) each has a root as a mirrored (md) partition, and a second mirror partition that holds the PV for LVM.

ie: on my sparc64:

    (/dev/sda) (first disk)
    Disk /dev/sda (Sun disk label): 255 heads, 63 sectors, 8922 cylinders
    Units = cylinders of 16065 * 512 bytes

    Device Flag Start End Blocks Id System
    /dev/sda1 0 12 96390 83 Linux native
    /dev/sda2 12 134 979965 fd Linux raid autodetect
    /dev/sda3 0 8922 71665965 5 Whole disk
    /dev/sda4 305 8922 69216052+ fd Linux raid autodetect
    /dev/sda5 134 305 1373557+ fd Linux raid autodetect

(/dev/sdb)(second disk)

    Disk /dev/sdb (Sun disk label): 255 heads, 63 sectors, 8922 cylinders
    Units = cylinders of 16065 * 512 bytes

    Device Flag Start End Blocks Id System
    /dev/sdb1 0 12 96390 83 Linux native
    /dev/sdb2 12 134 979965 fd Linux raid autodetect
    /dev/sdb3 0 8922 71665965 5 Whole disk
    /dev/sdb4 305 8922 69216052+ fd Linux raid autodetect
    /dev/sdb5 134 305 1373557+ fd Linux raid autodetect


on each disk sda1 and sdb1 are copies of the boot partition (silo hates mirrored disks, I'm convinced of it!), so they are ext2 filesystems, I just dd /dev/sda1 to /dev/sdb1 if I change kernels or update silo.

/dev/sda5 and /dev/sdb5 are the two parts for /dev/md1 ( / )

/dev/sda2 and /dev/sdb2 are the two parts for /dev/md2 (swap); I'm using an old Ultra 60 with 2 72G 10k RPM drives, which are prone to breakage - I hate my system to crash just because a disk dies... :)

/dev/sda4 and /dev/sdb4 are the two parts for /dev/md4 (lvm); this is then broken down into

    LV VG Attr LSize Origin Snap% Move Log Copy%
    distfiles rootvg -wi-ao 4.00G
    home rootvg -wi-ao 10.00G
    opt rootvg -wi-ao 4.00G
    portage rootvg -wi-ao 2.00G
    tmp rootvg -wi-a- 2.00G
    usr rootvg -wi-ao 8.00G
    var rootvg -wi-ao 4.00G
    vartmp rootvg -wi-ao 6.00G

then mounted as:

    Filesystem Size Used Avail Use% Mounted on
    /dev/md/1 1.4G 141M 1.2G 11% /
    udev 11M 295k 11M 3% /dev
    /dev/sda1 96M 5.9M 85M 7% /boot
    /dev/mapper/rootvg-usr
    8.5G 2.4G 5.8G 29% /usr
    /dev/mapper/rootvg-portage
    2.2G 279M 1.8G 14% /usr/portage
    /dev/mapper/rootvg-distfiles
    4.3G 700M 3.4G 18% /usr/portage/distfiles
    /dev/mapper/rootvg-home
    11G 173M 9.9G 2% /home
    /dev/mapper/rootvg-opt
    4.3G 143M 3.9G 4% /opt
    /dev/mapper/rootvg-var
    4.3G 329M 3.7G 9% /var
    /dev/mapper/rootvg-vartmp
    6.4G 13M 6.1G 1% /var/tmp
    shm 1.1G 0 1.1G 0% /dev/shm
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