[linux-lvm] vg works fine under FC3, but not FC4

[linux-lvm] vg works fine under FC3, but not FC4

[john_gore]

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My vg mounts fine under fc3, but when i installed fc4 on a new drive, I cant bring in the vg. I get errors for hdc like "Couldn't find device with uuid..." and PV unknown device (from pvscan). 
 
I can plug back in the old boot drive and run under fc3 and things work well.
 
The vg consists of 1 lv and 2 pv drives configured as:
 
my_vg:
  my_lv1:
     hdc2 (ext2)
     hdd (single partition as ext2) 
 
The old hda boot disk is ext3 running FC3 and the new hda boot disk is running the dafault lvm partitions under FC4. 
 
hdc is formatted with boot and swap on hdc1 and hdc5 - probably this was from an earlier install (although I did have these disks plugged in while installing FC4 - when the installer started asking about reformatting hdc and hdd, I powered down, unplugged these drives, and redid the install)
 
Any ideas to try?
 
- John



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Re: [linux-lvm] vg works fine under FC3, but not FC4

[Richard Ray]

I had a similar problem with FC4.
lvm2-2.01 has problems.
Downgrade to lvm2-2.00 from FC3.

Richard

On Tue, 16 Aug 2005 john_gore@yahoo.com wrote:

> My vg mounts fine under fc3, but when i installed fc4 on a new drive, I cant bring in the vg. I get errors for hdc like "Couldn't find device with uuid..." and PV unknown device (from pvscan).
>
> I can plug back in the old boot drive and run under fc3 and things work well.
>
> The vg consists of 1 lv and 2 pv drives configured as:
>
> my_vg:
>  my_lv1:
>     hdc2 (ext2)
>     hdd (single partition as ext2)
>
> The old hda boot disk is ext3 running FC3 and the new hda boot disk is running the dafault lvm partitions under FC4.
>
> hdc is formatted with boot and swap on hdc1 and hdc5 - probably this was from an earlier install (although I did have these disks plugged in while installing FC4 - when the installer started asking about reformatting hdc and hdd, I powered down, unplugged these drives, and redid the install)
>
> Any ideas to try?
>
> - John
>
>
>

Re: [linux-lvm] vg works fine under FC3, but not FC4

[john_gore]

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Any guidance on the best way to downgrade? Yum doesnt seem to do this and I get a number of dependencies using rpm - libdevmapper.so.1.00, libdevmapper.so.1.00(base) and libreadline.so.4 
 
Thanks, John

Richard Ray <rray@mstc.state.ms.us> wrote:
I had a similar problem with FC4.
lvm2-2.01 has problems.
Downgrade to lvm2-2.00 from FC3.

Richard

On Tue, 16 Aug 2005 john_gore@yahoo.com wrote:

> My vg mounts fine under fc3, but when i installed fc4 on a new drive, I cant bring in the vg. I get errors for hdc like "Couldn't find device with uuid..." and PV unknown device (from pvscan).
>
> I can plug back in the old boot drive and run under fc3 and things work well.
>
> The vg consists of 1 lv and 2 pv drives configured as:
>
> my_vg:
> my_lv1:
> hdc2 (ext2)
> hdd (single partition as ext2)
>
> The old hda boot disk is ext3 running FC3 and the new hda boot disk is running the dafault lvm partitions under FC4.
>
> hdc is formatted with boot and swap on hdc1 and hdc5 - probably this was from an earlier install (although I did have these disks plugged in while installing FC4 - when the installer started asking about reformatting hdc and hdd, I powered down, unplugged these drives, and redid the install)
>
> Any ideas to try?
>
> - John
>
>
>

_______________________________________________
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/

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Re: [linux-lvm] vg works fine under FC3, but not FC4

[Alasdair G Kergon]

On Tue, Aug 16, 2005 at 12:26:00AM -0700, john_gore@yahoo.com wrote:
> My vg mounts fine under fc3, but when i installed fc4 on a new drive, I cant bring in the vg. I get errors for hdc like "Couldn't find device with uuid..." and PV unknown device (from pvscan). 
  
Check for a bogus partition table.

If a device (e.g. /dev/hdd) is partitioned, you can't use /dev/hdd as the PV
but have to use one of its partitions instead e.g. /dev/hdd1.
If something like this happened, you need to remove the partition table.

Alasdair
-- 
agk@redhat.com

Re: [linux-lvm] vg works fine under FC3, but not FC4

[Richard Ray]

wget http://mirrors.kernel.org/fedora/core/3/i386/os/Fedora/RPMS/lvm2-2.00.25-1.01.i386.rpm
rpm -Uvh --nodeps --oldpackage lvm2-2.00.25-1.01.i386.rpm


On Tue, 16 Aug 2005 john_gore@yahoo.com wrote:

> Any guidance on the best way to downgrade? Yum doesnt seem to do this and I get a number of dependencies using rpm - libdevmapper.so.1.00, libdevmapper.so.1.00(base) and libreadline.so.4
>
> Thanks, John
>
> Richard Ray <rray@mstc.state.ms.us> wrote:
> I had a similar problem with FC4.
> lvm2-2.01 has problems.
> Downgrade to lvm2-2.00 from FC3.
>
> Richard
>
> On Tue, 16 Aug 2005 john_gore@yahoo.com wrote:
>
>> My vg mounts fine under fc3, but when i installed fc4 on a new drive, I cant bring in the vg. I get errors for hdc like "Couldn't find device with uuid..." and PV unknown device (from pvscan).
>>
>> I can plug back in the old boot drive and run under fc3 and things work well.
>>
>> The vg consists of 1 lv and 2 pv drives configured as:
>>
>> my_vg:
>> my_lv1:
>> hdc2 (ext2)
>> hdd (single partition as ext2)
>>
>> The old hda boot disk is ext3 running FC3 and the new hda boot disk is running the dafault lvm partitions under FC4.
>>
>> hdc is formatted with boot and swap on hdc1 and hdc5 - probably this was from an earlier install (although I did have these disks plugged in while installing FC4 - when the installer started asking about reformatting hdc and hdd, I powered down, unplugged these drives, and redid the install)
>>
>> Any ideas to try?
>>
>> - John
>>
>>
>>
>
> _______________________________________________
> 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] vg works fine under FC3, but not FC4

[john_gore]

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Thanks, I guess the right way to do this is to use fdisk to remove partitions 1 and 5, then extend the lv to cover the whole disk, then use resize2fs or ext2resize to resize the filesystem
 
This seems preferrable to reverting to version 2.00 and maintaining an old version
 
Thanks, John

Alasdair G Kergon <agk@redhat.com> wrote:
On Tue, Aug 16, 2005 at 12:26:00AM -0700, john_gore@yahoo.com wrote:
> My vg mounts fine under fc3, but when i installed fc4 on a new drive, I cant bring in the vg. I get errors for hdc like "Couldn't find device with uuid..." and PV unknown device (from pvscan). 

Check for a bogus partition table.

If a device (e.g. /dev/hdd) is partitioned, you can't use /dev/hdd as the PV
but have to use one of its partitions instead e.g. /dev/hdd1.
If something like this happened, you need to remove the partition table.

Alasdair
-- 
agk@redhat.com

_______________________________________________
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/

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Re: [linux-lvm] vg works fine under FC3, but not FC4

[Alasdair G Kergon]

No - I'm suggesting you need to check if any *whole device* PVs like hdd 
actually have partition tables on them, and if so, remove them.

Alasdair

Re: [linux-lvm] vg works fine under FC3, but not FC4

[john_gore]

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Thanks - I now see a post you make last year and I think this is exactly the situation
Another cause of problems could be if people created a whole-disk PV 
on a device that actually held a partition table - i.e. they
ignored the partition table, even though the kernel would still be using it.

From 2.00.29, lvm2 tries to detect partitioned devices and stop you
using them directly as PVs unless you remove the partition table first.
(i.e. if it's partitioned, only the partitions can be PVs, not the whole
disk device)
 
I can remove the partition table, but dont I still have to do something with the sectors residing on the other partitions? If I delete the partition table, LVM would assume the entire disk is formatted the same, but there will still be sectors at the beginning and end that were left over from the boot and swap partitions.
 
Thanks, John

Alasdair G Kergon <agk@redhat.com> wrote:
No - I'm suggesting you need to check if any *whole device* PVs like hdd 
actually have partition tables on them, and if so, remove them.

Alasdair

_______________________________________________
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/

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Re: [linux-lvm] vg works fine under FC3, but not FC4

[Antoine]

from my experience, this doesn't help, it seems that pvscan, vgscan 
doesn't recognize whole device as lvm capable device and then remove it 
from .cache (so your vg seems to disappear but if you manually put your 
device in .cache, it fixes everything)


see output for exemple :
pitch:/etc/lvm# pvs
  PV         VG   Fmt  Attr PSize   PFree
  /dev/hdc   vg0  lvm2 a-    19.11G 19.11G
  /dev/hdd   vg0  lvm2 a-   149.05G  4.05G
pitch:/etc/lvm#
pitch:/etc/lvm#
pitch:/etc/lvm# pvscan
  Couldn't find device with uuid 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
  PV unknown device   VG vg0   lvm2 [149.05 GB / 4.05 GB free]
  PV /dev/hdc         VG vg0   lvm2 [19.11 GB / 19.11 GB free]
  Total: 2 [168.16 GB] / in use: 2 [168.16 GB] / in no VG: 0 [0   ]
pitch:/etc/lvm# pvs
  Couldn't find device with uuid 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
  Couldn't find device with uuid 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
  Couldn't find all physical volumes for volume group vg0.
  Can't read vg0: skipping
  Couldn't find device with uuid 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
  Couldn't find all physical volumes for volume group vg0.
  Can't read vg0: skipping

note that it doesn't happen on both disks, but they were set up identically.

see also this output, pvdisplay on the faulty device seems to fix it :
pitch:/etc/lvm# vgdisplay
  Couldn't find device with uuid 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
  Couldn't find all physical volumes for volume group vg0.
  Volume group "vg0" doesn't exist
pitch:/etc/lvm# pvdisplay
  Couldn't find device with uuid 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
  --- Physical volume ---
  PV Name               unknown device
  VG Name               vg0
  PV Size               149.05 GB / not usable 0  
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              38156
  Free PE               1036
  Allocated PE          37120
  PV UUID               iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs
  
  --- Physical volume ---
  PV Name               /dev/hdc
  VG Name               vg0
  PV Size               19.11 GB / not usable 0  
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              4892
  Free PE               4892
  Allocated PE          0
  PV UUID               vzCHIG-WqYt-w2Kv-qGog-vK74-GEBu-svsWBm
  
pitch:/etc/lvm# pvdisplay /dev/hdd
  --- Physical volume ---
  PV Name               /dev/hdd
  VG Name               vg0
  PV Size               149.05 GB / not usable 0  
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              38156
  Free PE               1036
  Allocated PE          37120
  PV UUID               iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs
  

pitch:/etc/lvm#
pitch:/etc/lvm# pvdisplay
  --- Physical volume ---
  PV Name               /dev/hdd
  VG Name               vg0
  PV Size               149.05 GB / not usable 0  
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              38156
  Free PE               1036
  Allocated PE          37120
  PV UUID               iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs
  
  --- Physical volume ---
  PV Name               /dev/hdc
  VG Name               vg0
  PV Size               19.11 GB / not usable 0  
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              4892
  Free PE               4892
  Allocated PE          0
  PV UUID               vzCHIG-WqYt-w2Kv-qGog-vK74-GEBu-svsWBm
  
pitch:/etc/lvm# vgs
  VG   #PV #LV #SN Attr  VSize   VFree
  vg0    2   1   0 wz--n 168.16G 23.16G

so for me at least, the best practice for now is to set a partition on 
the whole disk (hdd1) set its type '8e' and use it instead of the whole 
device. I didnt have any problem working like this.

fyi: debian sarge with :
pitch:~# vgscan --version
  LVM version:     2.01.04 (2005-02-09)
  Library version: 1.01.00-ioctl (2005-01-17)
  Driver version:  4.1.1

Alasdair G Kergon wrote:

>No - I'm suggesting you need to check if any *whole device* PVs like hdd 
>actually have partition tables on them, and if so, remove them.
>
>Alasdair
>
>_______________________________________________
>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] vg works fine under FC3, but not FC4

[john_gore]

Thanks all for your help. For the benefit of others,
here is the solution Alasdair and others recommended
that worked. (Putting this into the how-to document
would save Alasdair some time)

Situation: Drive hdc was actually partitioned with 3
partitions when I installed it in an LVM volume. LVM
version 2.00.?? allowed a pvcreate on it with the
partition table intact. Later versions of 2.00.?? (.13
perhaps?) do not ignore the partition table. So, it
worked fine until upgrading to 2.01

Solution:

Wipe the partition table: (some recommended bs=1k and
others recommended bs=512 which I tried first since it
was more conservative)

dd if=/dev/zero of=/dev/hdc bs=512 count=1
blockdev --rereadpt /dev/hdc

Now, do vgscan and pvscan to confirm it worked

Then, I had to exclude the dvd drive (hdb for me) from
LVM scans, adding this to /etc/lvm/lvm.conf:

filter = [ "r|/dev/hdb|","r|/dev/cdrom|",
"r|/dev/dvd|"]

Then, add the vg and mount:
	vgchange -ay my_vg
	mkdir /my_mount_point
	mount /dev/my_vg/my_lv1 /my_mount_point

Finally, add the line in /etc/fstab for the mount

Here's links to earlier messages on the subject:
www.redhat.com/archives/linux-lvm/2005-March/msg00084.html
http://www.archivum.info/debian-bugs-rc@lists.debian.org/2004-12/msg00652.html


--- Antoine <lists@chwing.com> wrote:

> from my experience, this doesn't help, it seems that
> pvscan, vgscan 
> doesn't recognize whole device as lvm capable device
> and then remove it 
> from .cache (so your vg seems to disappear but if
> you manually put your 
> device in .cache, it fixes everything)
> 
> 
> see output for exemple :
> pitch:/etc/lvm# pvs
>   PV         VG   Fmt  Attr PSize   PFree
>   /dev/hdc   vg0  lvm2 a-    19.11G 19.11G
>   /dev/hdd   vg0  lvm2 a-   149.05G  4.05G
> pitch:/etc/lvm#
> pitch:/etc/lvm#
> pitch:/etc/lvm# pvscan
>   Couldn't find device with uuid
> 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
>   PV unknown device   VG vg0   lvm2 [149.05 GB /
> 4.05 GB free]
>   PV /dev/hdc         VG vg0   lvm2 [19.11 GB /
> 19.11 GB free]
>   Total: 2 [168.16 GB] / in use: 2 [168.16 GB] / in
> no VG: 0 [0   ]
> pitch:/etc/lvm# pvs
>   Couldn't find device with uuid
> 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
>   Couldn't find device with uuid
> 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
>   Couldn't find all physical volumes for volume
> group vg0.
>   Can't read vg0: skipping
>   Couldn't find device with uuid
> 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
>   Couldn't find all physical volumes for volume
> group vg0.
>   Can't read vg0: skipping
> 
> note that it doesn't happen on both disks, but they
> were set up identically.
> 
> see also this output, pvdisplay on the faulty device
> seems to fix it :
> pitch:/etc/lvm# vgdisplay
>   Couldn't find device with uuid
> 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
>   Couldn't find all physical volumes for volume
> group vg0.
>   Volume group "vg0" doesn't exist
> pitch:/etc/lvm# pvdisplay
>   Couldn't find device with uuid
> 'iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs'.
>   --- Physical volume ---
>   PV Name               unknown device
>   VG Name               vg0
>   PV Size               149.05 GB / not usable 0  
>   Allocatable           yes
>   PE Size (KByte)       4096
>   Total PE              38156
>   Free PE               1036
>   Allocated PE          37120
>   PV UUID              
> iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs
>   
>   --- Physical volume ---
>   PV Name               /dev/hdc
>   VG Name               vg0
>   PV Size               19.11 GB / not usable 0  
>   Allocatable           yes
>   PE Size (KByte)       4096
>   Total PE              4892
>   Free PE               4892
>   Allocated PE          0
>   PV UUID              
> vzCHIG-WqYt-w2Kv-qGog-vK74-GEBu-svsWBm
>   
> pitch:/etc/lvm# pvdisplay /dev/hdd
>   --- Physical volume ---
>   PV Name               /dev/hdd
>   VG Name               vg0
>   PV Size               149.05 GB / not usable 0  
>   Allocatable           yes
>   PE Size (KByte)       4096
>   Total PE              38156
>   Free PE               1036
>   Allocated PE          37120
>   PV UUID              
> iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs
>   
> 
> pitch:/etc/lvm#
> pitch:/etc/lvm# pvdisplay
>   --- Physical volume ---
>   PV Name               /dev/hdd
>   VG Name               vg0
>   PV Size               149.05 GB / not usable 0  
>   Allocatable           yes
>   PE Size (KByte)       4096
>   Total PE              38156
>   Free PE               1036
>   Allocated PE          37120
>   PV UUID              
> iZzizb-LmBD-0wx1-QD3g-76aO-1zJI-d61tNs
>   
>   --- Physical volume ---
>   PV Name               /dev/hdc
>   VG Name               vg0
>   PV Size               19.11 GB / not usable 0  
>   Allocatable           yes
>   PE Size (KByte)       4096
>   Total PE              4892
>   Free PE               4892
>   Allocated PE          0
>   PV UUID              
> vzCHIG-WqYt-w2Kv-qGog-vK74-GEBu-svsWBm
>   
> pitch:/etc/lvm# vgs
>   VG   #PV #LV #SN Attr  VSize   VFree
>   vg0    2   1   0 wz--n 168.16G 23.16G
> 
> so for me at least, the best practice for now is to
> set a partition on 
> the whole disk (hdd1) set its type '8e' and use it
> instead of the whole 
> device. I didnt have any problem working like this.
> 
> fyi: debian sarge with :
> pitch:~# vgscan --version
>   LVM version:     2.01.04 (2005-02-09)
>   Library version: 1.01.00-ioctl (2005-01-17)
>   Driver version:  4.1.1
> 
> Alasdair G Kergon wrote:
> 
> >No - I'm suggesting you need to check if any *whole
> device* PVs like hdd 
> >actually have partition tables on them, and if so,
> remove them.
> >
> >Alasdair
> >
> >_______________________________________________
> >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 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/
>