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<sect1 id="vinum-synopsis"> |
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<sect1 id="vinum-synopsis"> |
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<title>Synopsis</title> |
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<title>Synopsis</title> |
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<para>No matter what disks you have, there will always be limitations:</para> |
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<para>No matter what disks you have, there are always potential problems:</para> |
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<itemizedlist> |
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<itemizedlist> |
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<listitem> |
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<listitem> |
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<para>They can be too small.</para> |
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<para>They can be too small.</para> |
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</listitem> |
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</listitem> |
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<listitem> |
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<listitem> |
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<para>They can be too slow.</para> |
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<para>They can be too slow.</para> |
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</listitem> |
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</listitem> |
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<listitem> |
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<listitem> |
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<para>They can be too unreliable.</para> |
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<para>They can be too unreliable.</para> |
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</listitem> |
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</listitem> |
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</itemizedlist> |
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</itemizedlist> |
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<para>One way some users safeguard themselves against such issues is |
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through the use of multiple, and sometimes redundant, disks.</para> |
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<para>In addition to supporting various cards and controllers for hardware |
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RAID systems, the base FreeBSD system includes the Vinum Volume Manager, |
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a block device driver that implements virtual disk drives.</para> |
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<para>Vinum provides more flexibility, performance, and reliability than |
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traditional disk storage, and implements RAID-0, RAID-1, and RAID-5 |
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models both individually and in combination.</para> |
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<para>This chapter provides an overview of potential problems with traditional |
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disk storage, and an introduction to the Vinum Volume Manager.</para> |
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</sect1> |
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</sect1> |
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<sect1 id="vinum-intro"> |
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<sect1 id="vinum-intro"> |