I’m planning to use LVM for KVM, and when I try to create a VG it fails, so how can I create my VG and LV ?
[root@server ~]# vgcreate virtual-machines /dev/sda Device /dev/sda not found (or ignored by filtering). Unable to add physical volume '/dev/sda' to volume group 'virtual-machines'. [root@server ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 2.0T 929G 976G 49% / tmpfs 3.9G 124K 3.9G 1% /dev/shm /dev/sda1 194M 57M 128M 31% /boot [root@server ~]# pvscan No matching physical volumes found
vgcreate just saved you from accidentally destroying all your data. Don’t try this again until you fully understand what’s going on.
I recommend you familiarize yourself with at least these parts of the LVM HOWTO:
/dev/sda is already in use, so attempting to create LVM volumes on it will destroy any data currently there. You will need another hard drive, or at least another hard drive partition.
Unfortunately, without knowing your setup, it’s impossible for me to give more specific advice.
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