178 lines
3.1 KiB
HTML
178 lines
3.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>Why move a segment?</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="EVMS User Guide"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Moving segment storage objects"
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HREF="segstorobjs.html"><LINK
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TITLE="What is segment moving?"
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TITLE="Which segment manager plug-ins implement the move function?"
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>Prev</A
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><TD
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>Chapter 23. Moving segment storage objects</TD
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><TD
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WIDTH="10%"
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><H1
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CLASS="sect1"
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><A
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NAME="whymove"
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></A
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>23.2. Why move a segment?</H1
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><P
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> Segments are moved for a variety of reasons. The most compelling among
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them is to make better use of disk freespace. Disk freespace is an unused
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contiguous extent of sectors on a disk that has been identified by EVMS
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as a freespace segment. A data segment can only be expanded by adding
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sectors to the end of the segment, moving the end of the data segment
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up into the freespace that immediately follows the data segment. However,
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what if there is no freespace following the data segment? A segment or
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segments could
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be be moved around to put freespace after the segment that is to be
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expanded. For example:
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</P
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><P
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></P
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><UL
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><LI
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><P
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>The segment following the segment to be expanded can be moved
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elsewhere on the disk, thus freeing up space after the segment that
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is to be expanded.</P
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></LI
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><LI
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><P
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>The segment to be expanded can be moved into freespace where
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there is more room for the segment to be expanded.
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</P
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></LI
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><LI
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><P
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>The segment can be moved into freespace that precedes the
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segment so that after the move the data segment can be expanded into the freespace
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created by the move.</P
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></LI
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VALIGN="top"
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>What is segment moving?</TD
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><TD
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WIDTH="34%"
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>Which segment manager plug-ins implement the move function?</TD
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> |