The volume group metadata contains:
The volume group information contains:
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Name and unique id
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A version number which is incremented whenever the metadata gets updated
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Any properties: Read/Write? Resizeable?
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Any administrative limit on the number of physical volumes and logical volumes it may contain
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The extent size (in units of sectors which are defined as 512 bytes)
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An unordered list of physical volumes making up the volume group, each with:
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Its UUID, used to determine the block device containing it
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Any properties, such as whether the physical volume is allocatable
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The offset to the start of the first extent within the physical volume (in sectors)
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The number of extents
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An unordered list of logical volumes. each consisting of
