Chapter 3 creating storagesets – HP Array Controller HSG V8.7 Software User Manual

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Selecting a Cache Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12

Fault-Tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12

Backing up Power with a UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–13

Connecting the Subsystem to the Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–14

Connecting a Dual-Redundant Configuration to the Host . . . . . . . . . . . . . . 2–16

Chapter 3 Creating Storagesets

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2

Planning and Configuring Storagesets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4

Creating a Storageset and Device Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5

Determining Storage Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–7

Choosing a Storageset Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–8

Using Stripesets to Increase I/O Performance . . . . . . . . . . . . . . . . . . . . . . . . 3–8

Using Mirrorsets to Ensure Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–12

Using RAIDsets to Increase Performance and Availability . . . . . . . . . . . . . 3–15

Using Striped Mirrorsets for Highest Performance and Availability . . . . . . 3–17

Cloning Data for Backup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–19

Backing Up Your Subsystem Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–23

Saving Subsystem Configuration Information to a Single Disk . . . . . . . . . 3–23

Saving Subsystem Configuration Information to Multiple Disks . . . . . . . . 3–23

Saving Subsystem Configuration Information to a Storageset . . . . . . . . . . 3–24

Controller and Port Worldwide Names (Node IDs) . . . . . . . . . . . . . . . . . . . . . . 3–26

Restoring Worldwide Names (Node IDs) . . . . . . . . . . . . . . . . . . . . . . . . . . 3–26

Unit World Wide Names (LUN IDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–27

Assigning Unit Numbers for Host Access to Storagesets . . . . . . . . . . . . . . . . . . 3–28

Assigning Unit Offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–29

Assigning Access Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–30

Creating a Storageset Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–32

Device PTL Addressing Convention within the Controller . . . . . . . . . . . . . 3–33

Planning Partitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–37

Defining a Partition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–37

Guidelines for Partitioning Storagesets and Disk Drives. . . . . . . . . . . . . . . 3–38

Choosing Switches for Storagesets and Devices. . . . . . . . . . . . . . . . . . . . . . . . . 3–39

Enabling Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–39

Changing Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–39

RAIDset Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–40

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