[linux-lvm] swap tagged as lvm2

[linux-lvm] swap tagged as lvm2

[Bernard Fay]

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Hi,

We have installed RHEL 4.7 on a single disk (actually two disk in hardware
RAID).  Part of it use regular partions and others LVM2 logical volumes.  To
my surprise, when running pvs or pvscan, the swap partition is shown has
LVM2:

# pvscan
  PV /dev/sda5   VG vgsys            lvm2 [53,19 GB / 32,19 GB free]
  PV /dev/sda3                       lvm2 [65,21 GB]
  Total: 2 [118,39 GB] / in use : 1 [53,19 GB] / in no VG: 1 [65,21 GB]

But if I type fdisk -l /dev/sda, sda3 is a good old swap partition:

# fdisk -l /dev/sda

Disque /dev/sda: 72.7Go, 72746008576 octets
255 têtes, 63 secteurs/piste, 8844 cylindres
Unités = cylindres de 16065 * 512 = 8225280 octets

Périphérique Boot    Start     End      Blocks   Id    System
/dev/sda1   *         1      13      104391   83  Linux
 /dev/sda2   *        14     332     2562367+  83  Linux
 /dev/sda3   *       333    1899    12586927+  82  Linux swap
 /dev/sda4   *      1900    8844    55785712+   5  Extended
 /dev/sda5   *      1900    8844    55785681+  8e  Linux LVM

I do not think this is a big problem but I am curious of why and could it be
a problem?

Thanks for your help,
Bernard

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Re: [linux-lvm] swap tagged as lvm2

[Bryn M. Reeves]

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Bernard Fay wrote:
> Hi,
>  
> We have installed RHEL 4.7 on a single disk (actually two disk in hardware 
> RAID).  Part of it use regular partions and others LVM2 logical volumes.  To my 
> surprise, when running pvs or pvscan, the swap partition is shown has LVM2:
>  
> # pvscan
>   PV /dev/sda5   VG vgsys            lvm2 [53,19 GB / 32,19 GB free]
>   PV /dev/sda3                       lvm2 [65,21 GB]
>   Total: 2 [118,39 GB] / in use : 1 [53,19 GB] / in no VG: 1 [65,21 GB]
>  
> But if I type fdisk -l /dev/sda, sda3 is a good old swap partition:
>  
> # fdisk -l /dev/sda
>  
> Disque /dev/sda: 72.7Go, 72746008576 octets
> 255 t�tes, 63 secteurs/piste, 8844 cylindres
> Unit�s = cylindres de 16065 * 512 = 8225280 octets
>  
> P�riph�rique Boot    Start     End      Blocks   Id    System
> /dev/sda1   *         1      13      104391   83  Linux
> /dev/sda2   *        14     332     2562367+  83  Linux
> /dev/sda3   *       333    1899    12586927+  82  Linux swap
> /dev/sda4   *      1900    8844    55785712+   5  Extended
> /dev/sda5   *      1900    8844    55785681+  8e  Linux LVM
>  
> I do not think this is a big problem but I am curious of why and could it be a 
> problem?

Looks like the partition was previously used as an LVM PV. Just wipe out
the first 1M or so and run mkswap again.

Regards,
Bryn.

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Re: [linux-lvm] swap tagged as lvm2

[Bernard Fay]

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Right on target Bryn.  Your solution fixed it.

Thanks a lot,
Bernard


On 9/5/08, Bryn M. Reeves <breeves@redhat.com> wrote:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Bernard Fay wrote:
> > Hi,
> >
> > We have installed RHEL 4.7 on a single disk (actually two disk in
> hardware
> > RAID).  Part of it use regular partions and others LVM2 logical
> volumes.  To my
> > surprise, when running pvs or pvscan, the swap partition is shown has
> LVM2:
> >
> > # pvscan
> >   PV /dev/sda5   VG vgsys            lvm2 [53,19 GB / 32,19 GB free]
> >   PV /dev/sda3                       lvm2 [65,21 GB]
> >   Total: 2 [118,39 GB] / in use : 1 [53,19 GB] / in no VG: 1 [65,21 GB]
> >
> > But if I type fdisk -l /dev/sda, sda3 is a good old swap partition:
> >
> > # fdisk -l /dev/sda
> >
> > Disque /dev/sda: 72.7Go, 72746008576 octets
> > 255 têtes, 63 secteurs/piste, 8844 cylindres
> > Unités = cylindres de 16065 * 512 = 8225280 octets
> >
> > Périphérique Boot    Start     End      Blocks   Id    System
> > /dev/sda1   *         1      13      104391   83  Linux
> > /dev/sda2   *        14     332     2562367+  83  Linux
> > /dev/sda3   *       333    1899    12586927+  82  Linux swap
> > /dev/sda4   *      1900    8844    55785712+   5  Extended
> > /dev/sda5   *      1900    8844    55785681+  8e  Linux LVM
> >
> > I do not think this is a big problem but I am curious of why and could it
> be a
> > problem?
>
> Looks like the partition was previously used as an LVM PV. Just wipe out
> the first 1M or so and run mkswap again.
>
> Regards,
> Bryn.
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.9 (GNU/Linux)
> Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
>
> iEYEARECAAYFAkjBO8sACgkQ6YSQoMYUY9470QCg4Akby6y0KkN6D4lulftnCZJA
> QE4AnjV9i1GHDvXVRVfzeGW4BlMlsHDe
> =OEkz
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>
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>

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