[linux-lvm] lvm 0.8 to 1.0 transition?

[linux-lvm] lvm 0.8 to 1.0 transition?

[Friedrich Lobenstock]

Anything special I have to take care if I make a transition from
lvm 0.8 to lvm 1.0? 

Otherwise I would do the same as described in
http://www.sistina.com/lvm_howtos/lvm_howto/Moving_a_volume_group_to_.html


-- 
MfG / Regards
Friedrich Lobenstock

Re: [linux-lvm] lvm 0.8 to 1.0 transition?

[Heinz J . Mauelshagen]

On Tue, Feb 26, 2002 at 06:45:31PM +0100, Friedrich Lobenstock wrote:
> Anything special I have to take care if I make a transition from
> lvm 0.8 to lvm 1.0? 
> 
> Otherwise I would do the same as described in
> http://www.sistina.com/lvm_howtos/lvm_howto/Moving_a_volume_group_to_.html

In case you just want to update your LVM software, you don't need to
vgexport/vgimport your VGs as described under that URL.

Presuming that you took backups of your data and metadata (/etc/lvmconf/*)
and don't have root on a LV, you just need to install the new LVM software
(take LVM 1.0.3!), and run "vgscan;vgchange -ay" after the successfull
installation and reboot. "vgscan;vgchange -ay" is probably in your system
startup script anyway.

To be save, you could copy your LVM 0.8 software to /sbin/lvm-0.8 (tools) and
/lib/lvm-0.8 (library) respectively. Make your LVM 0.8 capable kernel
bootable too.

With these preperations, you still can boot into single user for LVM 0.8
recovery in case something goes wrong.

> 
> 
> -- 
> MfG / Regards
> Friedrich Lobenstock
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Re: [linux-lvm] lvm 0.8 to 1.0 transition?

[Friedrich Lobenstock]

"Heinz J . Mauelshagen" wrote:
> 
> In case you just want to update your LVM software, you don't need to
> vgexport/vgimport your VGs as described under that URL.
> 
> Presuming that you took backups of your data and metadata (/etc/lvmconf/*)
> and don't have root on a LV,

Yes root is on a LV on RAID1 and the data is on a LV on another RAID1

# uname -a
Linux www 2.4.0-test12-pre4-reiserfs-md-fixes #4 Fri Jan 19 14:48:29 CET 2001 i686 unknown

# cat /proc/lvm
LVM driver version 0.8final  (15/02/2000)
 
Total:  2 VGs  2 PVs  6 LVs (6 LVs open 6 times)
 
Global: 156410 bytes malloced   IOP version: 6   22:43:33 active
 
VG:  system-disk  [1 PV, 4 LV/4 open]  PE Size: 4096 KB
  Usage [KB/PE]: 9969664 /2434 total  9969664 /2434 used  0 /0 free
  PV:  [AA] md1                    9969664 /2434     9969664 /2434           0 /0
    LVs: [AWCL  ] swap                        524288 /128      1x open
         [AWDL  ] root                       2097152 /512      1x open
         [AWDL  ] tmp                         524288 /128      1x open
         [AWDL  ] var                        6823936 /1666     1x open
 
VG:  data-disk  [1 PV, 2 LV/2 open]  PE Size: 8192 KB
  Usage [KB/PE]: 78143488 /9539 total  55615488 /6789 used  22528000 /2750 free
  PV:  [AA] md3                   78143488 /9539    55615488 /6789    22528000 /2750
    LVs: [AWDL  ] 1                         18022400 /2200     1x open
         [AWDL  ] 2                         37593088 /4589     1x open

# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/system-disk/root
                      2.0G  1.5G  522M  75% /
/dev/md0               50M   37M   13M  74% /boot
/dev/system-disk/tmp  512M   32M  480M   6% /tmp
/dev/system-disk/var  6.5G   92M  6.4G   1% /var
/dev/data-disk/1       17G   12G  5.1G  70% /mount/1
/dev/data-disk/2       36G   12G   24G  34% /mount/2

/dev/system-disk/ has PV /dev/md1
/dev/data-disk/ has PV /dev/md3

# cat /proc/mdstat
Personalities : [raid1]
read_ahead 1024 sectors
md0 : active raid1 hdc1[0] hda1[1]
      51264 blocks [2/2] [UU]
 
md1 : active raid1 hdc2[0] hda2[1]
      9970560 blocks [2/2] [UU]
 
md3 : active raid1 hdg1[1] hde1[0]
      78150592 blocks [2/2] [UU]

Therefore I will install a new system and I'll just take the disks
that belong to /dev/md3 and put them in this new system. So I'll
have the old system to put the disks back if anything goes wrong
in the new system. 

In the new system I just need to pvmove the the data onto the new 
disks, this time hardware RAID instead of software RAID, so no 
fancy stuff to get lilo boot with root on LV.

So how should I do it, just "vgscan;vgchange -ay" or do I need to
vgexport/vgimport and will this cause troubles?

-- 
MfG / Regards
Friedrich Lobenstock
\x7f

Re: [linux-lvm] lvm 0.8 to 1.0 transition?

[Heinz J . Mauelshagen]

On Wed, Feb 27, 2002 at 02:39:27PM +0100, Friedrich Lobenstock wrote:
> "Heinz J . Mauelshagen" wrote:
> > 
> > In case you just want to update your LVM software, you don't need to
> > vgexport/vgimport your VGs as described under that URL.
> > 
> > Presuming that you took backups of your data and metadata (/etc/lvmconf/*)
> > and don't have root on a LV,
> 
> Yes root is on a LV on RAID1 and the data is on a LV on another RAID1
> 
> # uname -a
> Linux www 2.4.0-test12-pre4-reiserfs-md-fixes #4 Fri Jan 19 14:48:29 CET 2001 i686 unknown
> 
> # cat /proc/lvm
> LVM driver version 0.8final  (15/02/2000)
>  
> Total:  2 VGs  2 PVs  6 LVs (6 LVs open 6 times)
>  
> Global: 156410 bytes malloced   IOP version: 6   22:43:33 active
>  
> VG:  system-disk  [1 PV, 4 LV/4 open]  PE Size: 4096 KB
>   Usage [KB/PE]: 9969664 /2434 total  9969664 /2434 used  0 /0 free
>   PV:  [AA] md1                    9969664 /2434     9969664 /2434           0 /0
>     LVs: [AWCL  ] swap                        524288 /128      1x open
>          [AWDL  ] root                       2097152 /512      1x open
>          [AWDL  ] tmp                         524288 /128      1x open
>          [AWDL  ] var                        6823936 /1666     1x open
>  
> VG:  data-disk  [1 PV, 2 LV/2 open]  PE Size: 8192 KB
>   Usage [KB/PE]: 78143488 /9539 total  55615488 /6789 used  22528000 /2750 free
>   PV:  [AA] md3                   78143488 /9539    55615488 /6789    22528000 /2750
>     LVs: [AWDL  ] 1                         18022400 /2200     1x open
>          [AWDL  ] 2                         37593088 /4589     1x open
> 
> # df -h
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/system-disk/root
>                       2.0G  1.5G  522M  75% /
> /dev/md0               50M   37M   13M  74% /boot
> /dev/system-disk/tmp  512M   32M  480M   6% /tmp
> /dev/system-disk/var  6.5G   92M  6.4G   1% /var
> /dev/data-disk/1       17G   12G  5.1G  70% /mount/1
> /dev/data-disk/2       36G   12G   24G  34% /mount/2
> 
> /dev/system-disk/ has PV /dev/md1
> /dev/data-disk/ has PV /dev/md3
> 
> # cat /proc/mdstat
> Personalities : [raid1]
> read_ahead 1024 sectors
> md0 : active raid1 hdc1[0] hda1[1]
>       51264 blocks [2/2] [UU]
>  
> md1 : active raid1 hdc2[0] hda2[1]
>       9970560 blocks [2/2] [UU]
>  
> md3 : active raid1 hdg1[1] hde1[0]
>       78150592 blocks [2/2] [UU]
> 
> Therefore I will install a new system and I'll just take the disks
> that belong to /dev/md3 and put them in this new system. So I'll
> have the old system to put the disks back if anything goes wrong
> in the new system. 
> 
> In the new system I just need to pvmove the the data onto the new 
> disks, this time hardware RAID instead of software RAID, so no 
> fancy stuff to get lilo boot with root on LV.
> 
> So how should I do it, just "vgscan;vgchange -ay" or do I need to
> vgexport/vgimport and will this cause troubles?

If you want to move the devices over to another system, vgexport+vgimport
is the recommended way to go.

> 
> -- 
> MfG / Regards
> Friedrich Lobenstock
> \x7f
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Re: [linux-lvm] lvm 0.8 to 1.0 transition?

[Friedrich Lobenstock]

On Wed, 27 Feb 2002 18:43, Heinz J . Mauelshagen wrote:

> If you want to move the devices over to another system,
> vgexport+vgimport is the recommended way to go.

So you mean that there are no known problems with
vgexport (lvm 0.8) and vgimport (lvm 1.0)

-- 
MfG / Regards
Friedrich Lobenstock

Re: [linux-lvm] lvm 0.8 to 1.0 transition?

[Heinz J . Mauelshagen]

On Wed, Feb 27, 2002 at 09:25:29PM +0100, Friedrich Lobenstock wrote:
> On Wed, 27 Feb 2002 18:43, Heinz J . Mauelshagen wrote:
> 
> > If you want to move the devices over to another system,
> > vgexport+vgimport is the recommended way to go.
> 
> So you mean that there are no known problems with
> vgexport (lvm 0.8) and vgimport (lvm 1.0)

Yes.

> 
> -- 
> MfG / Regards
> Friedrich Lobenstock
> 
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-