What is difference between segment, Volume and Partition ?(In Storage Domain)

Question

I have a basic question related to storage domain. Can any one answer what is difference between segment, Volume and Partition ? Thanks.

Answer 1

A partition is a division of a storage device described in the partition map, which may contain a volume. A volume comprises the bytes that contain a filesystem.

An unpartitioned device, such as a floppy, contains a volume but does not contain a partition.

I've never heard of "segment." Google gives http://evms.sourceforge.net/terminology.html, which defines that as any logically contiguous range of sectors.