IBM Storwize V5030 User Manual

Chapter 5. Host configuration 259
7. Click Close to return to the host view, which now lists your newly created host object, as
shown in Figure 5-72.
Figure 5-72 The hosts view lists the newly created host object
8. Repeat these steps for all of your SAS hosts.
After all of the host objects are created, see Chapter 6, “Volume configuration” on page 287 to
create volumes and map them to the hosts.
5.6 Host Clusters
IBM Spectrum Virtualize software supports host clusters starting with version 7.7.1. A host
cluster is a group of logical host objects that can be managed together. For example, you can
create a volume mapping that is shared by every host in the host cluster. The systems use
internal protocols to manage access to the volumes and ensure consistency of the data. Host
objects that represent hosts can be grouped in a host cluster and share access to volumes.
Volume mappings can either be shared or private. Shared mappings are volume mappings
that are shared among all the hosts that are in a host cluster. When a host cluster is created,
any common volume mappings become shared among all the hosts within the host cluster. If
a mapping is not common, it remains a private mapping for that host only. Private mappings
are mappings that are associated with an individual host.
A host cluster allows a user to create a group of hosts to form a cluster, which is treated as
one single entity, thus allowing multiple hosts to have access to the same set of volumes.
Volumes that are mapped to that host cluster, are assigned to all members of the host cluster
with the same SCSI ID.
By defining a host cluster, the user can map one or more volumes to the host cluster object.
As a result the volume, or set of volumes, in turn gets assigned to each individual host object
that is part of the host cluster and each of the volumes gets mapped with the same SCSI ID to
all the hosts that are part of the host cluster with just one command.
A host cluster is made up of individual hosts, and volumes can also be assigned to individual
hosts that make up the cluster. Even though a host is part of host cluster, volumes can still be
assigned to a particular host in a non-shared manner. A policy can be devised which might
pre-assign a standard set of SCSI IDs for volumes to be assigned to the host cluster, and
another set of SCSI IDs to be used for individual assignments to hosts.
A typical use case is to define a host cluster containing all of the WWPNs belonging to the
hosts that are participating in a host operating system-based cluster, such as IBM
PowerHA®, Microsoft Cluster Server (MSCS) and such.
Note: For example, SCSIs ID 0 - 100 can be used for individual host assignment, and
SCSI IDs higher than 100 can be used for host cluster. By employing such a policy, wanted
volumes will not be shared, and others can be. For example, the boot volume of each host
can be kept private, while data and application volumes can be shared.

IBM Storwize V5030 Specifications

General

Model	IBM Storwize V5030
Category	Storage
Controller Enclosures	1 or 2
Maximum Drives	240
RAID Levels	0, 1, 5, 6, 10
Virtualization	Yes
Data Compression	Yes
Maximum Hosts	512
Form Factor	2U
Drive Types	SAS, NL-SAS, SSD
Host Interface	8 Gb FC, 16 Gb FC, 10 Gb iSCSI, 12 Gb SAS
Processor Cores	8 per controller

Summary

Chapter 2. Initial configuration

Hardware installation planning

Details the planning steps and requirements for installing the IBM Storwize V5000 Gen2 hardware.

SAN configuration planning

First-time setup

Details the initial setup process for a new IBM Storwize V5000 Gen2 service and system.

Initial configuration

Covers the tasks required to complete the initial configuration of the IBM Storwize V5000 Gen2 system.

Chapter 4. Storage pools

Working with internal drives

Working with storage pools

Details how to manage storage pools, including creating, actions on pools, and child storage pools.

Working with managed disks

Chapter 5. Host configuration

Preparing the host operating system

Details the steps required to prepare host operating systems for connecting to the Storwize V5000.

Creating hosts by using the GUI

Describes how to create Fibre Channel, iSCSI, and SAS hosts using the IBM Storwize V5000 GUI.

Chapter 6. Volume configuration

Introduction to volumes

Thin provisioning volumes

Create Volumes menu

Explains how to use the Create Volumes menu to create different types of volumes.

Creating volumes using the Volume Creation

Details the process of creating Basic, Mirrored, Custom, and HyperSwap volumes using the GUI.

HyperSwap and the mkvolume command

Migrating a volume to another storage pool

Chapter 7. Storage migration

Storage migration wizard overview

Storage migration wizard

Details the steps involved in the storage migration process using the wizard.

Avoiding data loss

Provides crucial advice on preventing data loss during storage migration.

Preparing the environment for migration

Describes the essential steps to prepare the environment before starting the storage migration wizard.

Migrating MDisks

Mapping volumes to hosts

Chapter 8. Advanced host and volume administration

Advanced host administration

Modifying volume mappings

Advanced volume administration

Mapping a volume to the host

Explains how to map created volumes to hosts, including system or manual SCSI ID assignment.

Volume copy: Make Primary

Chapter 9. Advanced features for storage efficiency

Easy Tier

Introduces IBM Easy Tier, its overview, process, and operating modes for performance optimization.

Thin provisioning

Explains thin provisioning, its concepts, performance considerations, and limitations.

Real-time Compression software

Describes IBM Real-time Compression software, its benefits, use cases, and concepts.

Chapter 10. Copy services

IBM FlashCopy

Details the IBM FlashCopy function, its business requirements, backup improvements, and restore options.

Implementing FlashCopy

FlashCopy mappings

Explains FlashCopy mappings, their attributes, and interaction with multiple target mappings.

Managing FlashCopy by using the GUI

Native IP replication

Remote Copy

Details Remote Copy services, including Metro Mirror, Global Mirror, and their configurations.

Metro Mirror overview

Global Mirror Overview

Stopping a remote copy relationship

Troubleshooting remote copy

Chapter 11. External storage virtualization

Planning for external storage virtualization

Working with external storage

Adding external storage

Provides steps for adding external storage systems to the Storwize V5030 virtualized environment.

Managing external storage

Chapter 12. RAS, monitoring, and troubleshooting

Reliability, availability, and serviceability features

Configuration backup

Explains how to perform configuration backups using the GUI and CLI for system restoration.

System update

Details the process of updating the IBM Storwize V5000 Gen2 system software and drive firmware.

Monitoring

Event log

Support Assistance

Collecting support information

Powering off the system and shutting down the infrastructure

Details the procedures for powering off the system and shutting down the entire infrastructure.

Chapter 13. Encryption

Planning for encryption

Covers planning considerations for data-at-rest encryption, including legal and security requirements.

Activating encryption

Describes the process of activating the encryption license, both automatically and manually.

Enabling encryption

Details the process of enabling encryption on the system using key servers or USB flash drives.

Enabling encryption using USB flash drives

Provides instructions on enabling encryption using USB flash drives as the key provider.

Enabling encryption using key servers

Details how to enable encryption using key servers as the primary or secondary key provider.

Recovering from a provider loss

Encrypted pools

Rekeying an encryption-enabled system

Appendix A. CLI setup and SAN Boot

Command-line interface

Basic setup

Details the basic setup for enabling CLI access using SSH keys.

Uploading the SSH public key to the IBM Storwize V5000 Gen2

Configuring the SSH client