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## Volumes 

In IBM Spectrum Virtualize, a volume  is an amount of storage space that is provisioned out of a storage pool. The volume is presented to a host as a SCSI logical unit (LU), that is, a logical disk. This chapter describes how to create and provision volumes on IBM Spectrum Virtualize systems. 

GLYPH<SM590000> Part one reviews IBM Spectrum Virtualize volumes, the classes of volumes that are available, and the volume customization options that are available. 

GLYPH<SM590000> Part two describes how to create volumes by using the GUI, and shows you how to map these volumes to hosts. 

GLYPH<SM590000> Part three introduces volume manipulation from the command line interface (CLI). 

This chapter includes the following topics: 

GLYPH<SM590000> An introduction to volumes 

GLYPH<SM590000> Creating volumes 

GLYPH<SM590000> Stretched volumes 

GLYPH<SM590000> Stretched volumes 

GLYPH<SM590000> HyperSwap volumes 

GLYPH<SM590000> I/O throttling 

GLYPH<SM590000> Mapping a volume to a host 

GLYPH<SM590000> Migrating a volume to another storage pool 

GLYPH<SM590000> Volume operations in the CLI 

