====== LVM ======
===== NALEZENI ODDILU =====

  * PV = Physical volume = vlastni disk
  * VG = Volume Group = skupina jednotek //slozka disku//
  * LV = Logical group = vlastni ulozne zarizeni, ktere utvori vysledny bod pripojeni ''/dev/mapper/vg_name-lv_name''

<code bash>
# pvscan
# vgscan [--mk-nodes]
# lvscan
</code>

===== AKTIVACE / DEAKTVACE VG =====
<code bash>
# vgchange -a [y|n] vg_name
</code>

===== VYTVORENI =====
  - blokove zarizeni muze byt ''/dev/mapper/xxxxx''
<code bash>
# pvcreate /dev/blok/zarizeni </dev/blok/zarizeni ...>
</code>

  - nova VG //vg_name//
<code bash>
# vgcreate vg_name /dev/blok/zarizeni
</code>

  - rozsireni stavajivi VG
<code bash>
# vgextend vg_name /dev/blok/zarizeni
</code>

  - zjisteni velikosti a dalsich informaci
<code bash>
# vgdisplay vg_name
</code>

  - vytvoreni LV

<WRAP info>
Mezi -n<jmeno> NENI mezera.
</WRAP>

Velikost 12G
<code bash>
# lvcreate -L12G <-nName> vg_name
</code>

nebo pocet extentu filesystemu
<code bash>
# lvcreate -l number_of_extents <-nLv_name> vg_name
</code>

nebo veskere volne misto
<code bash>
# lvcreate -l 100%FREE <-nLv_name> vg_name
</code>

  - vytvoreni filesystemu na ''/dev/mapper/vg_name-Lv_name''
<code bash>
# sudo mke2fs -j -m 0 -L My label /dev/mapper/vg_name-Lv_name
</code>

===== Automatika =====
edit /etc/crypttab
<code fstab>
<mapper>        </dev/name or /file>    <password file or none> luks
</code>

edit /etc/fstab
<code fstab>
/dev/mapper/<mapper>    <mount_point>   ext4    defaults        1 2
</code>

===== ZMENA VELIKOSTI =====
  - udelat partisnu (parted, fdisk..)
zde /dev/sdb1, lze i mapper device [ napr LUKS/LVM ]

  - Vytvoreni/zvetseni
<code bash>
# pvcreate /dev/sdb1 //vytvori physical volume
</code>
nebo
<code bash>
# pvresize /dev/sdb1
# vgextend vg_name /dev/sdb1 //pripoji novy k volume group
</code>

  - Odemceni zmen
<code bash>
# sudo pvchange -x y /dev/mapper/luks-steam
</code>

  - Zvetsime logical volume
<code bash>
# lvresize -r -L +10G /dev/VolGroup00/LogVol00 //s -r zvetsi i filesystem pod, l=size
</code>
nebo
<code bash>
# lvextend -l +100%FREE /dev/VGNAME/LVNAME 
</code>

  - Uzamknuti zmen
<code bash>
#sudo pvchange -x n /dev/mapper/luks-steam
</code>