"In addition to getting around maximum parition size, LVM is
useful for creating areas of storage that can easily be resized.
LVs can be grown or reduced. If you grow an LV, you can later grow
the underlying filesystem to fill it. If you want to reduce an LV
size, you must first shrink the filesystem and then you can reduce
the LV. Just make sure to shrink the filesystem by a little bit
more than you will shrink the LV. After all, you can fill the gap
by expanding the filesystem to fill that later."
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