IBM System Storage DS8000 Performance Monitoring and Tuning

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Logical configuration concepts and terminology

This chapter summarizes the important concepts that must be understood for the preparation of the DS8000 logical configuration and about performance tuning. You can obtain more information about the DS8000 logical configuration concepts in IBM DS8880 Architecture and Implementation (Release 8), SG24-8323.

This chapter includes the following topics:

•RAID levels and spares

•The abstraction layers for logical configuration

•Data placement on ranks and extent pools

3.1 RAID levels and spares

The arrays ...

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