LVM:n ymmärtäminen
LVM (Logical Volume Management) -osiot tarjoavat useita etuja tavallisiin osioihin verrattuna. LVM-osiot on muotoiltu fyysisiksi taltioiksi. Yksi tai useampi fyysinen osa yhdistetään taltioryhmäksi. Kunkin taltioryhmän kokonaistallennus jaetaan sitten yhteen tai useampaan loogiseen taltioon. Loogiset taltiot toimivat aivan kuten tavalliset osiot. Niillä on tiedostojärjestelmätyyppi, kuten ext4, ja liitoskohta.
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The boot loader cannot read LVM volumes. You must make a standard, non-LVM disk partition for your By default, the installation process always creates the |
To understand LVM better, imagine the physical volume as a pile of blocks. A block is a storage unit used to store data. Several piles of blocks can be combined to make a much larger pile, just as physical volumes are combined to make a volume group. The resulting pile can be subdivided into several smaller piles of arbitrary size, just as a volume group is allocated to several logical volumes.
An administrator may grow or shrink logical volumes without destroying data, unlike standard disk partitions. If the physical volumes in a volume group are on separate drives or RAID arrays then administrators may also spread a logical volume across the storage devices.
You may lose data if you shrink a logical volume to a smaller capacity than the data on the volume requires. To ensure maximum flexibility, create logical volumes to meet your current needs, and leave excess storage capacity unallocated. You may safely grow logical volumes to use unallocated space, as your needs dictate.
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