lvm -> "normal" system conversion

Greetins,

I have Linux Kubuntu Breezy system running completely on software raid, LVM2, including root and boot partitions (LILO boot loader). As for some reasons I found such a structure not very convenient I would like revert it the following one:
- crucial data on software raid matrix (sda & sdb), so home partition etc.;
- boot partition and root partition on separate hard disk (hde).

My questions are:
1. What is the quickiest and easiest way to perform such a conversion?
2. What is at least the rough sequence of steps to do?

Some details around my current system:

+++++++++++++++++++++++++++++++
A. current state

                                |------------ boot
sda ---                        |------------- root
        |--- md0---------|------------- home
sdb---                        |-------------- zasoby1
                               |-------------- zasoby2

boot loader: LILO on LVM2

+++++++++++++++++++++++++++++++
B. required state

sda ---

          |--- md0--------|-------------- home
sdb---                         |-------------- zasoby1
                                 |-------------- zasoby2

hde6-------------------|--------------- boot

                              |--------------- root

boot loader: GRUB
+++++++++++++++++++++++++++++++

I've already formatted and partitioned hde6. Now I think how to make a copy of root and finally how to install GRUB so it will be able to see LVM2 volumes...

Thanks in advance :-)

Kind regards,
Maciej (mslonik)

GG: 3321025
Skype: maciej_slojewski

Hi Maciej,

sorry, I don't exactly understand your current setting:
do sda/sdb form your raid md0? In both cases? Does your LVM then resides on md0?
Are root, boot home and zasoby1/2 logical volumes?

I only see, you want to move off root and boot to an other disk hde.

So, what do you mean by "revert"?

If you move off boot and root to a traditional partition, so why has grub to know anything about LVM any more?

perhaps you should give us an output of "pvs" and "lvs" commands.

regards, Dieter.

Dieter St�ken napisa�(a):

You are right, I should explain my current configuration in more details. I apologize for that. Here it is:

lvm> version
LVM version: 2.02.02 (2006-02-07)
Library version: 1.02.05 (2006-04-19)
Driver version: 4.4.0

lvm> pvs

 PV         VG   Fmt  Attr PSize  PFree
 /dev/md0   pv   lvm2 a-   74,53G    0

lvm> lvs

 LV      VG   Attr   LSize   Origin Snap%  Move Log Copy%
 boot    pv   -wi-ao 100,00M
 home    pv   -wi-ao   5,00G
 root    pv   -wi-ao  10,00G
 swap    pv   -wi-ao   2,00G
 zasoby1 pv   -wi-ao  30,00G
 zasoby2 pv   -wi-ao  27,43G

md0 is software raid type 1 matrix, which is made of sda1 and sdb1. Every part of the system (including boot and root) are on LVM2 LV. LILO as a boot loader.

My goal is to add a new hard drive (hde6) to the sytem and move root and boot from LVM2 to hde6. My second goal is to change boot loader from LILO to GRUB.

My questions are:
1. What is the quickiest and easiest way to perform such a conversion?
2. What is at least the rough sequence of steps to do?

Again, thanks in advance for help.

Kind regards,
Maciej (mslonik)

GG: 3321025
Skype: maciej_slojewski

Hi,

i have the following setup:

/dev/md2 --RAID1 (2x250GB)
/dev/md0 --RAID-5 (4x160GB)

both md-devices are added to LVM (2)

Library version:   1.02.03 (2006-02-08)
Driver version:    4.3.0

There are 1 VG and 10 LV's created. VG00 and LV00-LV09 Everything worked fine until i obviously did a mistake rezising the LV06. (I resized othe LV's without problem before but with LV06 i forgot something ...)

Now i moved all other LV's to /dev/md0 with pvmove -n ..., exept for LV06 However i couldn't "lvremove" the LV06 (error: can't remove open lv or so) I wasn't also able to deactivate the lv nor the vg.

So i tried to pvremove -ff the /dev/md2 PV (maybe the first big mistake) Then i did a pvcreate on /dev/md2 again.

Now everything seems to be messed up:

#pvdisplay
Couldn't find device with uuid 'faoJTZ-VDvh-Gqtd-V0jJ-qbMD-w8be-RvV4Dq'. --- Physical volume ---

  PV Name               unknown device
  VG Name               vg00
  PV Size               232,88 GB / not usable 0
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              59618
  Free PE               51938
  Allocated PE          7680
  PV UUID               faoJTZ-VDvh-Gqtd-V0jJ-qbMD-w8be-RvV4Dq

--- Physical volume ---

  PV Name               /dev/md0
  VG Name               vg00
  PV Size               460,16 GB / not usable 0
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              117800
  Free PE               63272
  Allocated PE          54528
  PV UUID               eydC5O-MF3B-oysT-KvoA-pu1D-o54H-GpPmkL

--- NEW Physical volume ---
PV Name /dev/md2
VG Name

  PV Size               232,89 GB
  Allocatable           NO
  PE Size (KByte)       0
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               L4624h-V1WS-AaXi-4leU-6QBD-9Cs6-4d3NBt

The "unknown" device still contains the data of LV06. This data is not important so i just want consistency back.

#lvremove vg00/lv06
Couldn't find device with uuid 'faoJTZ-VDvh-Gqtd-V0jJ-qbMD-w8be-RvV4Dq'. Couldn't find all physical volumes for volume group vg00. Couldn't find device with uuid 'faoJTZ-VDvh-Gqtd-V0jJ-qbMD-w8be-RvV4Dq'. Couldn't find all physical volumes for volume group vg00. Volume group "vg00" not found

Also, my cryptsetup gives errors:
#/etc/init.d/cryptdisks start
Starting crypto disks: clv00(starting)...
Command failed: Es ist ein Block-Device notwendig (a block device is necessary)
clv01(starting)...
Command failed: Es ist ein Block-Device notwendig
clv02(starting)...
Command failed: Es ist ein Block-Device notwendig
clv04(starting)...
Command failed: Es ist ein Block-Device notwendig
clv05(starting)...
Command failed: Es ist ein Block-Device notwendig
clv07(starting)...
Command failed: Es ist ein Block-Device notwendig
clv08(starting)...
Command failed: Es ist ein Block-Device notwendig
clv09(starting)...
Command failed: Es ist ein Block-Device notwendig
swap0(running) swap1(running).

Any ideas what i can do now ?

Thanks in advance,

Hi again,

i now manged to restore the uuid on /dev/md2, and i'm now able again to access all LV's.
But i can't get rid of LV06:

e2fsck -f /dev/mapper/clv06
e2fsck 1.39 (29-May-2006)
Die Dateisystem Gr��e ( laut SuperBlock) ist 14417920 Blocks Die physikalische Gr��e von Ger�t ist 7864320 Blocks Entweder der SuperBlock oder die Partionstabelle ist besch�digt! Abbrechen<j>? ja

translation: the superblock tells that the filesystem is 14417920 blocks big, but the physical size is 7864320.
#lvremove /dev/vg00/lv06
Can't remove open logical volume "lv06"
here i'm stuck again ...