[linux-lvm] lvextend

[linux-lvm] lvextend

[Adam Crews]

Hello,

I am having problems trying to extend a lv.

[root@scooby /root]# lvextend -v -l+6514 /dev/mirror_vg/mirror_lv 
lvextend -- checking for valid logical volume path 
lvextend -- locking logical volume manager 
lvextend -- checking existence of logical volume "/dev/mirror_vg/mirror_lv" 
lvextend -- checking for active logical volume "/dev/mirror_vg/mirror_lv" 
lvextend -- reading volume group data of volume group "mirror_vg" from disk(s) 
lvextend -- getting index of logical volume "/dev/mirror_vg/mirror_lv" in volume group "mirror_vg" 
lvextend -- extending logical volume "/dev/mirror_vg/mirror_lv" to 76.16 GB 
lvextend -- setting up logical volume "/dev/mirror_vg/mirror_lv" for extend
lvextend -- not enough free/allocatable physical extents to extend logical volume "/dev/mirror_vg/mirror_lv"
[root@scooby /root]# 


Looing at the vg I see that there is enough free space


[root@scooby /root]# vgdisplay 
--- Volume group --- 
VG Name 		mirror_vg 
VG Access 		read/write 
VG Status 		available/resizable 
VG # 			0 
MAX LV 			256 
Cur LV 			1
Open LV 		0 
MAX LV Size 		255.99 GB 
Max PV 			256 
Cur PV 			3 
Act PV 			3 
VG Size 		76.16 GB 
PE Size 		4 MB 
Total PE 		19496 
Alloc PE / Size 	12982 / 50.71 GB 
Free  PE / Size 	6514 / 25.45 GB 


[root@scooby /root]#

What am I doing wrong?

-Adam

Re: [linux-lvm] lvextend

[Fabian Herschel]

Hello,

On Tue, Dec 28, 1999 at 11:09:14AM -0800, Adam Crews wrote:
> Hello,
> 
> I am having problems trying to extend a lv.
> 
> [root@scooby /root]# lvextend -v -l+6514 /dev/mirror_vg/mirror_lv 

Just a question back, do you realy want to extend the lv with 6514 *extentds*? So you would
have a vg with just one lv which allocates the complete space of the vg.
What says lvdisplay /dev/mirror_vg/mirror_lv?
Does lvextend -v -l+6513 /dev/mirror_vg/mirror_lv work? The last line is to test, if there could be an error
in the handling of the last extend.

Greetings Fabian Herschel

-----------------------------------------------------------------------
Fabian Herschel                                 SuSE Rhein/Main AG     
Tel:    +49-6196-50951-23                       Mergenthalerallee 45-47
Fax:    +49-6196-409-607                        D-65760 Eschborn
mailto: Fabian.Herschel@suse.de                 http://www.suse.de      

Re: [linux-lvm] lvextend

[Adam Crews]

Yes I do want one big lv.  I used lvm so that as I add disks I can just
grow the fs without needing to re-do md devices or things like that.

What I figured out is that you cannot extend a striped lv.  even if I have
2 partitions to add to a lv that has 2 stripes, I still cant extend the
volume.

I needed the space so I took a backup, re-created the lv, and just
concatinated it this time instead of the stripes.  so next time I add a
disk, I'll be able to grow the lv and fs.

-Adam

On Wed, 29 Dec 1999, Fabian Herschel wrote:

| Hello,
| 
| On Tue, Dec 28, 1999 at 11:09:14AM -0800, Adam Crews wrote:
| > Hello,
| > 
| > I am having problems trying to extend a lv.
| > 
| > [root@scooby /root]# lvextend -v -l+6514 /dev/mirror_vg/mirror_lv 
| 
| Just a question back, do you realy want to extend the lv with 6514 *extentds*? So you would
| have a vg with just one lv which allocates the complete space of the vg.
| What says lvdisplay /dev/mirror_vg/mirror_lv?
| Does lvextend -v -l+6513 /dev/mirror_vg/mirror_lv work? The last line is to test, if there could be an error
| in the handling of the last extend.
| 
| Greetings Fabian Herschel
| 
| -----------------------------------------------------------------------
| Fabian Herschel                                 SuSE Rhein/Main AG     
| Tel:    +49-6196-50951-23                       Mergenthalerallee 45-47
| Fax:    +49-6196-409-607                        D-65760 Eschborn
| mailto: Fabian.Herschel@suse.de                 http://www.suse.de      
| 

Re: [linux-lvm] lvextend

[Torsten Neumann]

Adam Crews <acrews@cisco.com> wrote:

> Yes I do want one big lv.  I used lvm so that as I add disks I can just
> grow the fs without needing to re-do md devices or things like that.

> What I figured out is that you cannot extend a striped lv.  even if I have
> 2 partitions to add to a lv that has 2 stripes, I still cant extend the
> volume.

Are you using 0.7 ? There is a bug that avoids extending striped lvs under
some circumstances. Update to 0.8i or apply the following diff

--- pv_move.c.orig	Thu Dec 30 22:10:44 1999
+++ pv_move.c	Thu Dec 30 22:11:25 1999
@@ -254,7 +254,7 @@
 
       for ( pe = 0; pe < pe_to_move; pe++) {
          if ( lv_check_on_pv ( vg->pv[dst_pv_index],
-                               pe_src[pe].lv_num - 1) == TRUE &&
+                               pe_src[pe].lv_num) == TRUE &&
               vg->lv[pe_src[pe].lv_num-1]->lv_stripes > 1) break;
          if ( ( vg->lv[pe_src[pe].lv_num-1]->lv_allocation & LV_CONTIGUOUS) &&
               pv_check_free_contiguous ( vg->pv[dst_pv_index],


Torsten

Re: [linux-lvm] lvextend

[Terry Rigby]

thx Sean, I had just stumbled upon that as well.  another alternative seems to 
be pvdislplay /dev/hde |grep "PV Size" and then use that size in GB using 
lvextend -L +XXG /path/to/lv

Terry Rigby

On June 22, 2005 06:08 pm, Sean Boyd wrote:
> On Wed, 2005-06-22 at 17:16 -0700, Terry Rigby wrote:
> > I am trying to add a full hard drive to my LV by following the directions
> > at TLDP.org.  It says there to use lvextend -L +XXG where XX is the size
> > in GB you want to add to the LV.  Is there a more simple way to just add
> > a whole hard drive ie: /dev/hde
> >
> > It seems like a pain to have to manually figure out the size of the hard
> > drive then add it using lvextend -L +200GB for a 200GB hard drive
> > especially since we all know its not actually 200GB.
>
> You could increase the LV by using the remaining free physical extents
> (PE).
>
> To check how many PE's are available after extending the VG run
> vgdisplay and check "Free  PE / Size". The first value will give you the
> total number of PE's available.
>
> Then extend your LV using the -l switch to specify PE's rather than
> having to determine a size using the -L switch.
>
> For example "lvextend -l +25 /dev/volGroup00/myLVM" will extend myLVM by
> 25 PE's.
>
> Of course you then need to extend to file system to be able to use this
> extra space :)
>
> --Sean
>
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Re: [linux-lvm] lvextend

[Sean Boyd]

On Wed, 2005-06-22 at 17:16 -0700, Terry Rigby wrote:
> I am trying to add a full hard drive to my LV by following the directions at 
> TLDP.org.  It says there to use lvextend -L +XXG where XX is the size in GB 
> you want to add to the LV.  Is there a more simple way to just add a whole 
> hard drive ie: /dev/hde
> 
> It seems like a pain to have to manually figure out the size of the hard drive 
> then add it using lvextend -L +200GB for a 200GB hard drive especially since 
> we all know its not actually 200GB.

You could increase the LV by using the remaining free physical extents
(PE).

To check how many PE's are available after extending the VG run
vgdisplay and check "Free  PE / Size". The first value will give you the
total number of PE's available.

Then extend your LV using the -l switch to specify PE's rather than
having to determine a size using the -L switch.

For example "lvextend -l +25 /dev/volGroup00/myLVM" will extend myLVM by
25 PE's.

Of course you then need to extend to file system to be able to use this
extra space :)

--Sean

Re: [linux-lvm] lvextend

[dean gaudet]

you could do "pvdisplay /dev/hde" to find the number of extents... then 
use "lvextend -l" instead of -L ...

-dean

On Wed, 22 Jun 2005, Terry Rigby wrote:

> I am trying to add a full hard drive to my LV by following the directions at 
> TLDP.org.  It says there to use lvextend -L +XXG where XX is the size in GB 
> you want to add to the LV.  Is there a more simple way to just add a whole 
> hard drive ie: /dev/hde
> 
> It seems like a pain to have to manually figure out the size of the hard drive 
> then add it using lvextend -L +200GB for a 200GB hard drive especially since 
> we all know its not actually 200GB.
> 
> Thanks for your response.
> 
> Terry Rigby
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
> 

[linux-lvm] lvextend

[Terry Rigby]

I am trying to add a full hard drive to my LV by following the directions at 
TLDP.org.  It says there to use lvextend -L +XXG where XX is the size in GB 
you want to add to the LV.  Is there a more simple way to just add a whole 
hard drive ie: /dev/hde

It seems like a pain to have to manually figure out the size of the hard drive 
then add it using lvextend -L +200GB for a 200GB hard drive especially since 
we all know its not actually 200GB.

Thanks for your response.

Terry Rigby

[linux-lvm] lvextend

[Bengt Heijnesson]

Hello,

Have tried to extend a volume group but lvextend fails

# lvextend -v -L+1G /dev/itsdata/smb_home
lvextend -- checking for valid logical volume path
lvextend -- locking logical volume manager
lvextend -- checking existence of logical volume "/dev/itsdata/smb_home"
lvextend -- checking for active logical volume "/dev/itsdata/smb_home"
lvextend -- reading volume group data of volume group "itsdata" from
disk(s)
lvextend -- getting index of logical volume "/dev/itsdata/smb_home" in
volume group "itsdata"
lvextend -- getting status of "/dev/itsdata/smb_home" from VGDA in kernel
lvextend -- rounding size to stripe boundary size
lvextend -- extending logical volume "/dev/itsdata/smb_home" to 23.87 GB
lvextend -- setting up logical volume "/dev/itsdata/smb_home" for extend
lvextend -- not enough free/allocatable physical extents to extend logical
volume "/dev/itsdata/smb_home"

vgdisplay:
--- Volume group ---
VG Name               itsdata
VG Access             read/write
VG Status             available/resizable
VG #                  0
MAX LV                256
Cur LV                1
Open LV               1
MAX LV Size           255.99 GB
Max PV                256
Cur PV                20
Act PV                20
VG Size               45.70 GB
PE Size               4 MB
Total PE              11700
Alloc PE / Size       5850 / 22.85 GB
Free  PE / Size       5850 / 22.85 GB
VG UUID               w7CoKp-yGH3-OfuG-UQLY-Mu8l-aknD-Ioko6h

Any Hints ?

_______________________________________________________

"Light the fire within people, not underneath them"

[linux-lvm] lvextend

[Joerg.Redlich]

[-- Attachment #1: Type: text/plain, Size: 2409 bytes --]

Hallo,

bin mittlerweile ratlos und hoffe auf Ihre Hilfe !

Ich versuche ein lv zu erweitern, dies scheint auf den ersten Blick auch
zu funktionieren !

[root@NB110239 sbin]# df
Dateisystem          1K-Blöcke   Benutzt Verfügbar Ben% Eingehängt auf
/dev/hda3              1991577    351263   1537505  19% /
none                     95336         0     95336   0% /dev/shm
/dev/Volume00/LogVol00
                       1511856   1315876    119180  92% /usr
/dev/hda1              3479256   2060212   1419044  60% /win_sys


[root@NB110239 sbin]# lvscan
lvscan -- ACTIVE            "/dev/Volume00/LogVol00" [1.46 GB]
lvscan -- 1 logical volumes with 1.46 GB total in 1 volume group
lvscan -- 1 active logical volumes

[root@NB110239 sbin]# lvextend -L +200 /dev/Volume00/LogVol00 /dev/hda6
lvextend -- extending logical volume "/dev/Volume00/LogVol00" to 1.66 GB
lvextend -- doing automatic backup of volume group "Volume00"
lvextend -- logical volume "/dev/Volume00/LogVol00" successfully
extended

[root@NB110239 sbin]# lvscan
lvscan -- ACTIVE            "/dev/Volume00/LogVol00" [1.66 GB]
lvscan -- 1 logical volumes with 1.66 GB total in 1 volume group
lvscan -- 1 active logical volumes


[root@NB110239 sbin]# df
Dateisystem          1K-Blöcke   Benutzt Verfügbar Ben% Eingehängt auf
/dev/hda3              1991577    351418   1537350  19% /
none                     95336         0     95336   0% /dev/shm
/dev/Volume00/LogVol00
                       1511856   1315876    119180  92% /usr
/dev/hda1              3479256   2060212   1419044  60% /win_sys

Warum wird mir der hinzugefügte Platz nicht angezeigt bzw. zur Verfügung
gestellt ?


mit freundlichen Grüßen

j.redlich




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Re: [linux-lvm] lvextend

[Heinz Mauelshagen]

Another problem could be, that you have 3 stripes and not enough space
on a physical volume to hold the soize of one or more extended stripes.

Heinz


> Adam Crews <acrews@cisco.com> wrote:
> 
> > Yes I do want one big lv.  I used lvm so that as I add disks I can just
> > grow the fs without needing to re-do md devices or things like that.
> 
> > What I figured out is that you cannot extend a striped lv.  even if I have
> > 2 partitions to add to a lv that has 2 stripes, I still cant extend the
> > volume.
> 
> Are you using 0.7 ? There is a bug that avoids extending striped lvs under
> some circumstances. Update to 0.8i or apply the following diff
> 
> --- pv_move.c.orig	Thu Dec 30 22:10:44 1999
> +++ pv_move.c	Thu Dec 30 22:11:25 1999
> @@ -254,7 +254,7 @@
>  
>        for ( pe = 0; pe < pe_to_move; pe++) {
>           if ( lv_check_on_pv ( vg->pv[dst_pv_index],
> -                               pe_src[pe].lv_num - 1) == TRUE &&
> +                               pe_src[pe].lv_num) == TRUE &&
>                vg->lv[pe_src[pe].lv_num-1]->lv_stripes > 1) break;
>           if ( ( vg->lv[pe_src[pe].lv_num-1]->lv_allocation & LV_CONTIGUOUS) &&
>                pv_check_free_contiguous ( vg->pv[dst_pv_index],
> 
> 
> Torsten
> 

-- 

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Systemmanagement CS-TS                           T-Nova
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Heinz Mauelshagen                                Otto-Roehm-Strasse 71c
Senior Systems Engineer                          Postfach 10 05 41
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