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LVM - Cannot extend logical volume with "lvextend"

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xadamz23

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Jan 18, 2007, 10:07:47 AM1/18/07
to

I am trying to extend an existing logical volume on openSUSE 10.2 and
getting the following error:

raid:~ # lvextend -l +25000 /dev/vg01/lvdata
Extending logical volume lvdata to 556.56 GB
Insufficient free space: 142479 extents needed, but only 25618
available

Here is the ouput of vgdisplay:

raid:~ # vgdisplay -v
Finding all volume groups
Finding volume group "vg01"
--- Volume group ---
VG Name vg01
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 2
Act PV 2
VG Size 558.97 GB
PE Size 4.00 MB
Total PE 143097
Alloc PE / Size 117479 / 458.90 GB
Free PE / Size 25618 / 100.07 GB
VG UUID 0E567z-y3Kt-p2wZ-4CA6-JiSq-6hEk-LnIpNw

--- Logical volume ---
LV Name /dev/vg01/lvdata
VG Name vg01
LV UUID 6D9Yhg-pMoO-gly7-Bv5b-80BF-w6NG-UyjfHw
LV Write Access read/write
LV Status available
# open 1
LV Size 458.90 GB
Current LE 117479
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0

--- Physical volumes ---
PV Name /dev/md1
PV UUID mPwqF6-4xss-TQCu-q0tU-H8hU-t1yB-8aryXr
PV Status allocatable
Total PE / Free PE 117498 / 19

PV Name /dev/md2
PV UUID urYlKw-3g2A-V4Xf-qDBk-WqM4-JDeT-UNGQYZ
PV Status allocatable
Total PE / Free PE 25599 / 25599

Can someone tell me why the logical volume will not extend?


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JohnK

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Jan 22, 2007, 2:05:28 PM1/22/07
to
On Thu, 18 Jan 2007 07:07:47 -0800, xadamz23 wrote:

>
> I am trying to extend an existing logical volume on openSUSE 10.2 and
> getting the following error:
>
> raid:~ # lvextend -l +25000 /dev/vg01/lvdata Extending logical volume
> lvdata to 556.56 GB Insufficient free space: 142479 extents needed, but
> only 25618 available

I haven't done anything with Linux LVM but I've used HP LVM which is very
similar. Try -

lvextend -L 558G /dev/vg01/lvdata

That sets the end size rather than the additional space. The uppercase L
also uses human readable values like Gb and Mb rather than extents. Much
easier.

If that doesn't work then post the output from

lvdisplay -v /dev/vg01/lvdata

You might have some contraints on it.

JohnK

mikerj...@gmail.com

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Jan 30, 2007, 12:44:39 PM1/30/07
to
I've got the same problem. Hopefully someone will know the fix.

Trying to extend to a fixed size doesn't work either.

I get:
lvextend -L 45G /dev/system/home
Extending logical volume home to 45.00 GB
Insufficient free space: 11520 extents needed, but only 4953 available

vgdisplay shows plenty of space, but the extent count does match the
lvextend error:

vgdisplay system
--- Volume group ---
VG Name system
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 10


VG Access read/write
VG Status resizable
MAX LV 0

Cur LV 8
Open LV 7
Max PV 0
Cur PV 1
Act PV 1
VG Size 74.43 GB
PE Size 4.00 MB
Total PE 19055
Alloc PE / Size 14102 / 55.09 GB
Free PE / Size 4953 / 19.35 GB
VG UUID rkZOMa-XP0C-SxQp-k2N1-ftFU-H2Bt-VkXCR3

It gets even more strange. If I try to squeeze even a little more
space out of it:
lvextend -l +4500 /dev/system/home
Extending logical volume home to 57.58 GB
Insufficient free space: 14740 extents needed, but only 4953
available

I try to add 4500 extents when 4953 are available but it fails!


On Jan 22, 2:05 pm, JohnK <johnk.dev.n...@gmail.com> wrote:
> On Thu, 18 Jan 2007 07:07:47 -0800, xadamz23 wrote:
>
> > I am trying to extend an existing logical volume on openSUSE 10.2 and
> > getting the following error:
>
> > raid:~ # lvextend -l +25000 /dev/vg01/lvdata Extending logical volume

> > lvdata to 556.56 GB Insufficient free space: 142479extents needed, but> only25618 availableI haven't done anything with Linux LVM but I've used HP LVM which is very

David Bolt

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Jan 30, 2007, 1:43:34 PM1/30/07
to
On Tue, 30 Jan 2007, mikerj...@gmail.com wrote:-

<snip>

>It gets even more strange. If I try to squeeze even a little more
>space out of it:
>lvextend -l +4500 /dev/system/home
> Extending logical volume home to 57.58 GB
> Insufficient free space: 14740 extents needed, but only 4953
>available
>
>I try to add 4500 extents when 4953 are available but it fails!

Just so you know, this is a wild guess, and so may not actually be the
true cause. Also, I haven't actually done much with LVM, apart from
using it to consolidate a couple of drives into a single container.
However, from looking at this response, my guess is that LVM can't
extend the volume because it needs to create a new container of the
requested size into which to copy the old file system. If that is the
case, you can't extend the volume without adding at least another 40GB
to /dev/system.


Regards,
David Bolt

--
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