Sun Microsystems Sun StorEdge 5210 NAS - Manual (Page 30)

18 Sun StorEdge 5210 NAS Quick Reference Manual • November 2004
Partition
Partitions are sections on a LUN. Each LUN can have a maximum of four partitions.
Each partition can either have space allocated to it or be empty. When a LUN is first
created, all of the available space is located in the first partition, while the other
three partitions are empty. Each partition can “contain” only one file volume.
File Volume
File volumes are organized amounts of available storage space and are created from
partitions. The file volume is the space where the user stores information. If the
volume does not use up all of the available space in a partition, the remaining space
is automatically allocated to the next partition. After four volumes are created on a
LUN, any remaining space is inaccessible.
Segment
A segment is a portion of a partition that can be attached to an existing file volume
to increase its size. Segments can be “attached” to an existing file volume at any
time. If a file volume is nearly full, attaching a segment gives the users more space to
store data in. See “How to Attach Segments” on page 20 for more information.
How to Create File Volumes and
Segments
Every new file volume is limited to 255GB in size. If you want a larger file volume,
create one primary volume and up to 63 segments per LUN. Then attach the
segment(s) to the primary volume to increase its size. For more information about
attaching segments, refer to “How to Attach Segments” on page 20.