[linux-lvm] problems with basic lvm commands on Debian

[Michael Loftis]

Yeah.  You CAN'T use mounted filesystems for LVM.  You'll corrupt both.

--On August 25, 2005 11:09:13 PM -0400 Faheem Mitha <faheem at email.unc.edu> 
wrote:

>
> Dear People,
>
> I must be missing something obvious, but I'm having problems with basic
> commands on Debian Sarge, using lvm2.
>
> I installed lvm2 and dmsetup. I'm using the stock Debian kernel
> 2.6.8-2-386.
>
> I can do basic manipulations using /dev/hda1, but not with /dev/hda2.
>
> This is on a very ordinary Dell Optiplex, normal x86 architecture.
>
> *******************************************************************
>
> root at io:/home/faheem# df
> Filesystem           1K-blocks      Used Available Use% Mounted on
> /dev/hda2             37483592    300352  35279136   1% /
> tmpfs                   258052         0    258052   0% /dev/shm
> /dev/hda1               918322     14622    854704   2% /boot
>
>    Physical volume "/dev/hda2" successfully created
>
> root at io:/dev/mapper# pvcreate /dev/hda1
>
> root at io:/dev/mapper# pvdisplay /dev/hda1
>    --- Physical volume ---
>    PV Name               /dev/hda1
>    VG Name               testvg
>    PV Size               956.00 MB / not usable 0
>    Allocatable           yes
>    PE Size (KByte)       4096
>    Total PE              239
>    Free PE               239
>    Allocated PE          0
>    PV UUID               sGOTrW-ttC4-m4uq-Cwck-V5s3-knz7-NpydvJ
>
> root at io:/dev/mapper# vgcreate testvg /dev/hda1
>    Volume group "testvg" successfully created
> root at io:/dev/mapper# vgdisplay testvg
>    --- Volume group ---
>    VG Name               testvg
>    System ID
>    Format                lvm2
>    Metadata Areas        1
>    Metadata Sequence No  1
>    VG Access             read/write
>    VG Status             resizable
>    MAX LV                0
>    Cur LV                0
>    Open LV               0
>    Max PV                0
>    Cur PV                1
>    Act PV                1
>    VG Size               956.00 MB
>    PE Size               4.00 MB
>    Total PE              239
>    Alloc PE / Size       0 / 0
>    Free  PE / Size       239 / 956.00 MB
>    VG UUID               IHrOgz-RWDW-EIAY-m9vD-idgT-1I99-cyoS8n
>
> root at io:/dev/mapper# pvcreate /dev/hda2
>    Physical volume "/dev/hda2" successfully created
>
> All good so far. However.
>
> root at io:/dev/mapper# pvdisplay /dev/hda2
>    No physical volume label read from /dev/hda2
>    Failed to read physical volume "/dev/hda2"
>
> root at io:/home/faheem# vgextend testvg  /dev/hda2
>    No physical volume label read from /dev/hda2
>    /dev/hda2 not identified as an existing physical volume
>    Unable to add physical volume '/dev/hda2' to volume group 'testvg'.
>
> Any idea what is going on here? This is a new installation, and only has
> the bare bones on it.
>
> Please cc me on any reply. Thanks in advance.
>
>                                                       Faheem.
>
> _______________________________________________
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> linux-lvm at redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>



--
"Genius might be described as a supreme capacity for getting its possessors
into trouble of all kinds."
-- Samuel Butler