Difference between revisions of "LVM"

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=Related commands=
=Related commands=
==lvdisplay==
==lsblks==
==partprobe==
==lvchange==
==lvchange==


==vgchange==
==vgchange==


==dmsetup==
==dmsetup==


==vgs=
==vgs==


==lvcreate==
==lvcreate==

Revision as of 15:12, 26 August 2016

Logical Volume Management on Linux

NOTE: remember to add snapshot support when calling lvcreate

Related commands

lvdisplay

lsblks

partprobe

lvchange

vgchange

dmsetup

vgs

lvcreate

FAQ

Access logical volumes within logical volume

partprobe /dev/mapper/vg-mydata
lsblk

This will show the (sub) partitions/volumes, then edit /etc/lvm/lvm.conf

filter = [ "a|.*/|", "a|mydata|","r|.*|" ]

Then run:

vgscan
lvscan
vgs

Now you should see the names of the volumes you're looking for, so now:

vgchange -a y guestsname_mydata-home

and then you should be able to

mount /dev/mapper/guestsname_mydata-home

When done, remember to change back the filter in lvm.conf, default is

filter = [ "a|.*/|" ]

and of course then once again

vgscan
lvscan


lvremove: Logical volume vg-kvm/vps-snapshot is used by another device.=

???

some say lvchange -an the snapshot first, but that disables the lv it's connected to as well