LVM

• 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

# pvscan
# vgscan [--mk-nodes]
# lvscan

# vgchange -a [y|n] vg_name

1. blokove zarizeni muze byt /dev/mapper/xxxxx

# pvcreate /dev/blok/zarizeni </dev/blok/zarizeni ...>

1. nova VG vg_name

# vgcreate vg_name /dev/blok/zarizeni

1. rozsireni stavajivi VG

# vgextend vg_name /dev/blok/zarizeni

1. zjisteni velikosti a dalsich informaci

# vgdisplay vg_name

1. vytvoreni LV

Velikost 12G

# lvcreate -L12G <-nName> vg_name

nebo pocet extentu filesystemu

# lvcreate -l number_of_extents <-nLv_name> vg_name

nebo veskere volne misto

# lvcreate -l 100%FREE <-nLv_name> vg_name

1. vytvoreni filesystemu na /dev/mapper/vg_name-Lv_name

# sudo mke2fs -j -m 0 -L My label /dev/mapper/vg_name-Lv_name

edit /etc/crypttab

<mapper>        </dev/name or /file>    <password file or none> luks

edit /etc/fstab

/dev/mapper/<mapper>    <mount_point>   ext4    defaults        1 2

1. udelat partisnu (parted, fdisk..)

zde /dev/sdb1, lze i mapper device [ napr LUKS/LVM ]

1. Vytvoreni/zvetseni

# pvcreate /dev/sdb1 //vytvori physical volume

nebo

# pvresize /dev/sdb1
# vgextend vg_name /dev/sdb1 //pripoji novy k volume group

1. Odemceni zmen

# sudo pvchange -x y /dev/mapper/luks-steam

1. Zvetsime logical volume

# lvresize -r -L +10G /dev/VolGroup00/LogVol00 //s -r zvetsi i filesystem pod, l=size

nebo

# lvextend -l +100%FREE /dev/VGNAME/LVNAME 

1. Uzamknuti zmen

#sudo pvchange -x n /dev/mapper/luks-steam