Overview of Enhanced Storage Objects

The basic types of objects that you create with Enhanced Storage are volumes, state database replicas, and hot spare pools. The following table gives an overview of these Enhanced Storage objects.

Enhanced Storage Components

Enhanced Storage Component

What Is It?

Why Use It?

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Volumes, including RAID 0 devices (stripes, concatentations), RAID 1 devices (mirrors), RAID 5 devices, and soft partitions.

A group of physical slices that appear to the system as a single, logical device.

To increase storage capacity or reliability or both.

Metadevices

State database replicas

Store information about your Enhanced Storage configuration

Enhanced Storage requires state database replicas.

Metadevice State Database and State Database Replicas

Hot spare pool

Provides a collection of slices (hot spares) that are automatically substituted in case of slice failure in either a mirror or RAID 5 device.

To increase data availability for RAID 1 and RAID 5 volumes.

Hot Spare Pools

Disk sets

Provide a collection of Solaris volumes that may be non-concurrently shared between two different systems.

To provide a key component of a high availability system.

Disk sets