[linux-lvm] Physical volume size changed

[linux-lvm] Physical volume size changed

[Jens Hoffrichter]

Hi!

We are using the LVM here in our company to manage our partitions and
are really satisfied with the software, its really great to change
partition sizes on the fly and similar :)

We are using two VG, system and data. data consists of one physical volume,
/dev/scsi/host2/bus0/target1/lun0/disc, which is the logical volume of
a IBM ServeRaid SCSI Controller with 4 disks and a raid 5. This logical
volume has 101.7 GB.

Now we have extended the logical volume on the IBM ServeRaid by using
3 36 GB disks, so the logical volume on the raid controller now has
203.4 GB. 

I have issued a SCSI reset on the bus hoping that the LVM notices on the
fly that the physical volume size has changed, but it doesn't recognize
it.

I have not rebooted yet, that is the other hope that the LVM recognizes
the additional free space after the reboot, but I'm not sure.

Are there other possibilities that the LVM recognizes that the PV size
has changed? Or is there no hope at all?

I would be really glad if somebody could give me some hints where to look.

CU all,
Jens
-- 
GPG: 1024D/CF884D50  F2E8 F7FC F823 6464 4E9D  EFAB 6EE9 8B9C CF88 4D50
------------------------------------------------------------------------
  Jens Hoffrichter / joho@hausboot.org / Joho@IRC / Fon: 0172/5376989
    A dream is a wish your heart makes. 
                               (Seen on a parade in Walt Disney World)

Re: [linux-lvm] Physical volume size changed

[Joe Thornber]

pvresize

Re: [linux-lvm] Physical volume size changed

[Andreas Dilger]

On May 22, 2002  12:11 +0200, Jens Hoffrichter wrote:
> Now we have extended the logical volume on the IBM ServeRaid by using
> 3 36 GB disks, so the logical volume on the raid controller now has
> 203.4 GB. 

I assume when you say "logical volume" you actually mean "physical
volume"?

> I have issued a SCSI reset on the bus hoping that the LVM notices on the
> fly that the physical volume size has changed, but it doesn't recognize
> it.

No, you need to use "pvresize", which is part of very recent LVM tools.
I'm not sure if it needs kernel support or not.

Cheers, Andreas
--
Andreas Dilger
http://www-mddsp.enel.ucalgary.ca/People/adilger/
http://sourceforge.net/projects/ext2resize/

Re: [linux-lvm] Physical volume size changed

[James Hawtin]

> No, you need to use "pvresize", which is part of very recent LVM tools.
> I'm not sure if it needs kernel support or not.
>

Thats a really useful addition. Does it cope with partations been
extended at the front as well as the back?

James

Re: [linux-lvm] Physical volume size changed

[Heinz J . Mauelshagen]

On Wed, May 22, 2002 at 10:25:59AM +0000, James Hawtin wrote:
> 
> 
> > No, you need to use "pvresize", which is part of very recent LVM tools.
> > I'm not sure if it needs kernel support or not.
> >
> 
> Thats a really useful addition. Does it cope with partations been
> extended at the front as well as the back?

Just at the back.

In case you extend at the front, you need dd or the like to move your former
physical volume contents down to the new beginning of the partition and
pvresize afterwards.


> 
> James
> 
> 
> _______________________________________________
> 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] Physical volume size changed

[Heinz J . Mauelshagen]

On Wed, May 22, 2002 at 04:27:22AM -0600, Andreas Dilger wrote:
> On May 22, 2002  12:11 +0200, Jens Hoffrichter wrote:
> > Now we have extended the logical volume on the IBM ServeRaid by using
> > 3 36 GB disks, so the logical volume on the raid controller now has
> > 203.4 GB. 
> 
> I assume when you say "logical volume" you actually mean "physical
> volume"?
> 
> > I have issued a SCSI reset on the bus hoping that the LVM notices on the
> > fly that the physical volume size has changed, but it doesn't recognize
> > it.
> 
> No, you need to use "pvresize", which is part of very recent LVM tools.
> I'm not sure if it needs kernel support or not.

No, it doesn't because the physical volume to be resized needs to be inactive.
Thought that would be fair enough because it is a rare change anyway.

> 
> Cheers, Andreas
> --
> Andreas Dilger
> http://www-mddsp.enel.ucalgary.ca/People/adilger/
> http://sourceforge.net/projects/ext2resize/
> 
> 
> _______________________________________________
> 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] Physical volume size changed

[Jens Hoffrichter]

On Wed, May 22, 2002 at 04:27:22AM -0600, Andreas Dilger wrote:

> > Now we have extended the logical volume on the IBM ServeRaid by using
> > 3 36 GB disks, so the logical volume on the raid controller now has
> > 203.4 GB. 
> 
> I assume when you say "logical volume" you actually mean "physical
> volume"?
Yes, I meant the logical volume on the raid controller which is the physical
volume for the LVM. Sorry for the confusion :))

> > I have issued a SCSI reset on the bus hoping that the LVM notices on the
> > fly that the physical volume size has changed, but it doesn't recognize
> > it.
> 
> No, you need to use "pvresize", which is part of very recent LVM tools.
> I'm not sure if it needs kernel support or not.
OK, thx, I upgraded my lvm tools and I found the program. I just have to
convince my users now that they can't use the server for a while so I can
unmount the partitions on the lvm logical volume. But I have to resize
the partitions on the lv nevertheless :))

Thanks very much for the help from all of you!

CU all,
Jens
-- 
GPG: 1024D/CF884D50  F2E8 F7FC F823 6464 4E9D  EFAB 6EE9 8B9C CF88 4D50
------------------------------------------------------------------------
  Jens Hoffrichter / joho@hausboot.org / Joho@IRC / Fon: 0172/5376989
     A room without books is like a body without a soul! (Cicero)

RE: [linux-lvm] Physical volume size changed

[Unixcafe]

Hello, I work for HP, the developer of LVM... I am a Unix support
engineer...  LVM will allow you to vgextend up to 255 disks/devices into
a vg and create up to 255 lvols. You can lvextend a lvol as long as you
have free pe available in the vg. However, if you modify an existing
lun, extend it, etc, I do not believe lvm will recognize it, at that is
the case in HP Unix. The best course of action when using lvm and vg's
is to vgextend another disk/lun into the vg and lvextend the lvol to the
needed size.... Hope this helps.... Nicholas 

-----Original Message-----
From: linux-lvm-admin@sistina.com [mailto:linux-lvm-admin@sistina.com]
On Behalf Of Jens Hoffrichter
Sent: Wednesday, May 22, 2002 6:12 AM
To: linux-lvm@sistina.com
Subject: [linux-lvm] Physical volume size changed


Hi!

We are using the LVM here in our company to manage our partitions and
are really satisfied with the software, its really great to change
partition sizes on the fly and similar :)

We are using two VG, system and data. data consists of one physical
volume, /dev/scsi/host2/bus0/target1/lun0/disc, which is the logical
volume of a IBM ServeRaid SCSI Controller with 4 disks and a raid 5.
This logical volume has 101.7 GB.

Now we have extended the logical volume on the IBM ServeRaid by using 3
36 GB disks, so the logical volume on the raid controller now has 203.4
GB. 

I have issued a SCSI reset on the bus hoping that the LVM notices on the
fly that the physical volume size has changed, but it doesn't recognize
it.

I have not rebooted yet, that is the other hope that the LVM recognizes
the additional free space after the reboot, but I'm not sure.

Are there other possibilities that the LVM recognizes that the PV size
has changed? Or is there no hope at all?

I would be really glad if somebody could give me some hints where to
look.

CU all,
Jens
-- 
GPG: 1024D/CF884D50  F2E8 F7FC F823 6464 4E9D  EFAB 6EE9 8B9C CF88 4D50
------------------------------------------------------------------------
  Jens Hoffrichter / joho@hausboot.org / Joho@IRC / Fon: 0172/5376989
    A dream is a wish your heart makes. 
                               (Seen on a parade in Walt Disney World)

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read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html