HP StoreVirtual 4000, LeftHand Storage User Manual

HP LeftHand Storage User Guide

Abstract

This guide provides instructions for configuring individual storage systems, as well as for creating storage clusters, volumes, snapshots, and remote copies.

HP Part Number: AX696-96202 Published: November 2012 Edition: 8

Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license.

The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

Acknowledgements

Microsoft, Windows, Windows XP, and Windows NT are U.S. registered trademarks of Microsoft Corporation.

Contents

1 Getting started.........................................................................................14

Creating storage with HP LeftHand Storage................................................................................14

Configuring storage systems.....................................................................................................15

Creating a storage volume using the Management Groups, Clusters, and Volumes wizard...............15

Enabling server access to volumes............................................................................................16

Using the Map View...............................................................................................................17

Using the display tools.......................................................................................................17

Using views and layouts......................................................................................................17

Setting preferences.................................................................................................................18

Setting the font size and locale............................................................................................18

Setting naming conventions.................................................................................................18

Changing naming conventions........................................................................................18

Troubleshooting......................................................................................................................19

Storage systems not found...................................................................................................19

Configuring remote support for HP LeftHand Storage...................................................................19

2 Working with storage systems....................................................................21

Identifying the storage system hardware.....................................................................................21

Storage system tasks...............................................................................................................22

Logging in to and out of storage systems ..............................................................................22

Logging out of a storage system .....................................................................................22

Changing the storage system hostname................................................................................22

Locating the storage system in a rack....................................................................................22

Powering off or rebooting the storage system .............................................................................23

Powering on or off, or rebooting storage systems with modular components...............................23

Rebooting the storage system...............................................................................................24

Powering off the storage system...........................................................................................24

Upgrading SAN/iQ on storage systems....................................................................................25

Registering advanced features for a storage system ....................................................................25

Determining volume and snapshot availability ...........................................................................25

Checking status of dedicated boot devices ................................................................................26

Checking boot device status................................................................................................26

Getting there................................................................................................................26

Replacing a dedicated boot device......................................................................................27

3 Configuring RAID and Managing Disks.......................................................28

Getting there..........................................................................................................................28

Configuring and managing RAID..............................................................................................28

RAID Levels............................................................................................................................28

Explaining RAID devices in the RAID setup report.......................................................................29

RAID devices by RAID type.................................................................................................30

Virtual RAID devices......................................................................................................30

Planning the RAID configuration...............................................................................................30

Data protection..................................................................................................................30

Using RAID for data redundancy.....................................................................................30

Using Network RAID in a cluster.....................................................................................31

Using disk RAID with Network RAID in a cluster.....................................................................31

Mixing RAID configurations.................................................................................................32

Setting RAID rebuild rate.........................................................................................................32

General guidelines for setting the RAID rebuild rate................................................................32

Setting the RAID rebuild rate...............................................................................................32

Reconfiguring RAID.................................................................................................................33

Contents 3

To reconfigure RAID...........................................................................................................33

Configuring RAID for a P4800 G2 with 2 TB drives................................................................33

Monitoring RAID status............................................................................................................34

Data reads and writes and RAID status.................................................................................34

Data redundancy and RAID status........................................................................................34

Managing disks.....................................................................................................................35

Getting there.....................................................................................................................35

Reading the disk report on the Disk Setup tab........................................................................35

Verifying disk status............................................................................................................37

Viewing disk status for the VSA.......................................................................................37

Viewing disk status for the HP P4500 G2.........................................................................37

Viewing disk status for the HP P4300 G2.........................................................................38

Viewing disk status for the P4800 G2..............................................................................39

Viewing disk status for the HP P4900 G2 ........................................................................39

Viewing disk status for the HP LeftHand 4130....................................................................40

Viewing disk status for the HP LeftHand 4330...................................................................41

Replacing a disk.....................................................................................................................41

Using Repair Storage System...............................................................................................42

Replacing disks in hot-swap storage systems..........................................................................42

Preparing for a disk replacement.........................................................................................42

Replacing a disk in a hot-swap storage system ......................................................................43

4 Managing the network..............................................................................45

Network best practices............................................................................................................45

Changing network configurations.............................................................................................46

Managing settings on network interfaces...................................................................................46

TCP status tab....................................................................................................................46

Changing speed and duplex settings....................................................................................47

Changing NIC frame size...................................................................................................48

Jumbo frames...............................................................................................................48

Editing the NIC frame size..............................................................................................49

Changing NIC flow control.................................................................................................49

The TCP/IP tab.......................................................................................................................50

Identifying the network interfaces.........................................................................................50

Pinging an IP address.........................................................................................................50

To ping an IP address....................................................................................................50

Configuring the IP address manually.........................................................................................51

Using DHCP..........................................................................................................................51

Configuring network interface bonds.........................................................................................51

Bonding with 10 GbE interfaces..........................................................................................52

Supported bonds with 10 GbE........................................................................................53

Unsupported bonds with 10 GbE....................................................................................53

IP address for NIC bonds....................................................................................................53

NIC bonding and speed, duplex, frame size, and flow control settings......................................53

How Active-Passive bonding works.......................................................................................54

Physical and logical interfaces........................................................................................54

Which physical interface is preferred...............................................................................55

Summary of NIC status during failover.............................................................................55

Example network cabling topologies with Active-Passive.....................................................56

How link aggregation dynamic mode bonding works.............................................................57

Which physical interface is preferred...............................................................................57

Which physical interface is active....................................................................................58

Summary of NIC states during failover.............................................................................58

Example network cabling topologies with link aggregation dynamic mode...........................58

How Adaptive Load Balancing works ..................................................................................59

4 Contents

Which physical interface is preferred...............................................................................59

Which physical interface is active....................................................................................59

Summary of NIC states during failover.............................................................................60

Example network cabling topologies with Adaptive Load Balancing ....................................60

Creating a NIC bond.........................................................................................................61

Creating the bond.........................................................................................................62

Verify communication setting for new bond.......................................................................63

Viewing the status of a NIC bond........................................................................................64

Deleting a NIC bond..........................................................................................................65

Disabling a network interface...................................................................................................67

Configuring a disabled interface..........................................................................................68

Using a DNS server................................................................................................................68

Editing DNS settings...........................................................................................................68

Setting up routing...................................................................................................................69

Adding routing information.................................................................................................69

Editing routing information..................................................................................................69

Deleting routing information................................................................................................70

Configuring storage system communication................................................................................70

Selecting the interface used by the SAN/iQ software ............................................................70

Updating the list of manager IP addresses.............................................................................71

Fibre Channel .......................................................................................................................72

5 Setting the date and time..........................................................................73

Management group time.........................................................................................................73

Getting there..........................................................................................................................73

Refreshing the management group time.....................................................................................73

Using NTP.............................................................................................................................73

Editing NTP servers............................................................................................................74

Deleting an NTP server.......................................................................................................74

Delete an NTP server.....................................................................................................74

Changing the order of NTP servers .....................................................................................74

Editing the date and time.........................................................................................................75

Editing the time zone only........................................................................................................75

6 Managing authentication..........................................................................76

Managing administrative users.................................................................................................76

Adding an administrative user.............................................................................................76

Editing administrative users.................................................................................................76

Changing a user’s description.........................................................................................76

Changing a user’s password..........................................................................................76

Adding group membership to a user................................................................................76

Removing group membership from a user.........................................................................76

Deleting an administrative user.......................................................................................77

Managing administrative groups..............................................................................................77

Default administrative groups...............................................................................................77

Adding administrative groups.........................................................................................78

Editing administrative groups...............................................................................................78

Changing the group description......................................................................................78

Changing administrative group permissions......................................................................78

Adding users to an existing group...................................................................................78

Removing users from a group..........................................................................................78

Deleting administrative groups........................................................................................78

Using Active Directory for external authentication........................................................................79

Configuring external authentication......................................................................................80

Associating the Active Directory group with the SAN/iQ group................................................80

Removing the Active Directory configuration..........................................................................81

Contents 5

7 Monitoring the SAN.................................................................................82

Monitoring SAN status............................................................................................................82

Customizing the SAN Status Page .......................................................................................83

Using the SAN Status Page.................................................................................................84

Alarms and events overview.....................................................................................................84

Working with alarms...............................................................................................................86

Filtering the alarms list........................................................................................................86

Viewing and copying alarm details......................................................................................87

Viewing alarms in a separate window..................................................................................87

Exporting alarm data to a .csv file.......................................................................................87

Configuring events..................................................................................................................87

Changing the event retention period.....................................................................................87

Configuring remote log destinations.....................................................................................88

Viewing events in a separate window...................................................................................88

Working with events...............................................................................................................88

Viewing new events............................................................................................................88

Filtering the events list.........................................................................................................88

Saving filter views.........................................................................................................89

Deleting custom filters....................................................................................................89

Viewing event details..........................................................................................................89

Copying events to the clipboard...........................................................................................90

Exporting event data to a .csv or .txt file...............................................................................90

Configuring email notification..................................................................................................90

Configuring the email server................................................................................................90

Configuring email recipients................................................................................................91

Configuring SNMP.................................................................................................................91

Enabling SNMP agents.......................................................................................................92

Enabling the SNMP agent..............................................................................................92

Configuring access control for SNMP clients.....................................................................92

Adding an SNMP client............................................................................................92

Editing access control entries......................................................................................93

Deleting access control entries....................................................................................93

Disabling the SNMP agent.............................................................................................93

Disabling SNMP......................................................................................................93

Adding SNMP traps...........................................................................................................93

Using the SNMP MIBs........................................................................................................95

Troubleshooting SNMP.......................................................................................................96

Running diagnostic reports.......................................................................................................96

Generating a hardware information report.................................................................................97

Using log files......................................................................................................................100

Saving log files locally......................................................................................................100

Configuring a remote log and remote log destination...........................................................100

Editing remote log targets.................................................................................................100

Deleting remote logs........................................................................................................101

Exporting the management group support bundle.....................................................................101

Exporting the storage system support bundle............................................................................101

Exporting the System Summary...............................................................................................102

8 Working with management groups...........................................................103

Functions of management groups............................................................................................103

Planning management groups................................................................................................103

Creating a management group..............................................................................................104

Name the management group and add storage systems.......................................................104

Add administrative user....................................................................................................105

Set management group time..............................................................................................105

6 Contents

Set DNS server................................................................................................................105

Set up email for notification...............................................................................................105

Create cluster and assign a VIP.........................................................................................105

Create a volume and finish creating management group.......................................................106

Management group map view tab.....................................................................................106

Logging in to a management group ...................................................................................106

Configuration Summary overview...........................................................................................106

Reading the configuration summary....................................................................................107

Optimal configurations................................................................................................107

Configuration warnings................................................................................................107

Configuration errors.....................................................................................................108

Configuration guidance....................................................................................................108

Best Practice summary overview..............................................................................................109

Disk level data protection..................................................................................................110

Disk protection using RAID...........................................................................................110

Large single-system SATA cluster....................................................................................110

Disk RAID Consistency.................................................................................................110

Cluster-level data protection...............................................................................................110

Volume-level data protection..............................................................................................111

Volume access.................................................................................................................111

Systems running managers................................................................................................111

Network bonding............................................................................................................111

Network bond consistency................................................................................................111

Network flow control consistency.......................................................................................111

Network frame size consistency.........................................................................................111

Management group maintenance tasks...................................................................................111

Logging in to a management group....................................................................................111

Choosing which storage system to log in to.....................................................................112

Logging out of a management group..................................................................................112

Adding a storage system to an existing management group...................................................112

Starting and stopping managers........................................................................................112

Starting additional managers........................................................................................112

Stopping managers.....................................................................................................113

Implications of stopping managers............................................................................113

Editing a management group............................................................................................113

Setting or changing the local bandwidth priority.............................................................113

Saving the management group configuration information......................................................114

Shutting down a management group.......................................................................................114

If volumes are still connected to servers or hosts...................................................................114

Restarting the management group......................................................................................115

Restarted management group in maintenance mode........................................................115

Manually changing the management group to normal mode.............................................115

Removing a storage system from a management group..............................................................116

Deleting a management group...............................................................................................116

9 Working with managers and quorum........................................................118

Managers overview..............................................................................................................118

Best practice for managers in a management group.............................................................118

Managers and quorum.....................................................................................................119

Regular managers and specialized managers......................................................................120

Failover Managers......................................................................................................120

Virtual Managers........................................................................................................120

Using the Failover Manager...................................................................................................121

Planning the virtual network configuration...........................................................................121

Using the Failover Manager on Microsoft Hyper-V Server......................................................121

Contents 7

Installing the Failover Manager for Hyper-V Server...........................................................122

Uninstalling the Failover Manager from Hyper-V Server....................................................122

Using the Failover Manager for VMware vSphere................................................................123

Installing the Failover Manager for VMware vSphere.......................................................123

Installing the Failover Manager for other VMware platforms..............................................124

Configuring the IP address and host name.................................................................124

Installing the Failover Manager using the OVF files with the VI Client.................................125

Configure the IP address and host name....................................................................125

Finishing up with VI Client.......................................................................................125

Troubleshooting the Failover Manager on VMware vSphere..............................................125

Uninstalling the Failover Manager from VMware vSphere.................................................126

Using a virtual manager........................................................................................................126

Requirements for using a virtual manager............................................................................127

Adding a virtual manager.................................................................................................128

Starting a virtual manager to regain quorum.......................................................................129

Verifying virtual manager status.........................................................................................130

Stopping a virtual manager...............................................................................................130

Removing a virtual manager from a management group.......................................................131

10 Working with clusters............................................................................132

Clusters and storage systems..................................................................................................132

Creating a cluster.................................................................................................................132

Cluster Map View............................................................................................................133

Monitoring cluster usage.......................................................................................................133

Editing a cluster....................................................................................................................133

Editing cluster properties...................................................................................................133

Editing iSNS servers.........................................................................................................133

Editing cluster VIP addresses..............................................................................................134

Reconnecting volumes and applications after changing VIPs or iSNS servers............................134

Maintaining storage systems in clusters....................................................................................135

Adding a storage system to a cluster..................................................................................135

Upgrading the storage systems in a cluster using cluster swap................................................135

Reordering storage systems in a cluster...............................................................................136

Exchange a storage system in a cluster...............................................................................136

Removing a storage system from a cluster............................................................................136

Troubleshooting a cluster.......................................................................................................137

Auto Performance Protection..............................................................................................137

Auto Performance Protection and the VSA.......................................................................137

Auto Performance Protection and other clusters................................................................137

Repairing a storage system................................................................................................138

Deleting a cluster..................................................................................................................139

11 Provisioning storage..............................................................................141

Understanding how the capacity of the SAN is used.................................................................141

Provisioning storage..............................................................................................................141

Provisioning volumes.............................................................................................................141

Full provisioning...............................................................................................................142

Thin provisioning.............................................................................................................142

Best practice for setting volume size...............................................................................142

Planning data protection...................................................................................................142

Former terminology in release 8.1 and earlier.................................................................142

Data protection level....................................................................................................143

How data protection levels work...................................................................................144

Network RAID-10 (2–Way Mirror).............................................................................144

Network RAID-10+1 (3-Way Mirror)..........................................................................144

Network RAID-10+2 (4-Way Mirror)..........................................................................145

8 Contents

Network RAID-5 (Single Parity).................................................................................145

Network RAID-6 (Dual Parity)...................................................................................146

Provisioning snapshots...........................................................................................................147

Snapshots versus backups.................................................................................................147

The effect of snapshots on cluster space..............................................................................147

Managing capacity using volume size and snapshots...........................................................148

Volume size and snapshots...........................................................................................148

Schedules to snapshot a volume and capacity.................................................................148

Deleting snapshots......................................................................................................148

Ongoing capacity management.............................................................................................148

Number of volumes and snapshots.....................................................................................148

Reviewing SAN capacity and usage...................................................................................148

Cluster use summary....................................................................................................149

Volume use summary...................................................................................................150

System Use summary...................................................................................................151

Measuring disk capacity and volume size...........................................................................152

Block systems and file systems.......................................................................................152

Storing file system data on a block system......................................................................152

Changing the volume size on the server..............................................................................153

Increasing the volume size in Microsoft Windows............................................................153

Increasing the volume size in other environments.............................................................153

Changing configuration characteristics to manage space......................................................154

12 Using volumes......................................................................................155

Volumes and server access....................................................................................................155

Prerequisites....................................................................................................................155

Planning volumes..................................................................................................................155

Characteristics of volumes......................................................................................................156

Creating a volume................................................................................................................157

Viewing the volume map.......................................................................................................158

Editing a volume..................................................................................................................158

To edit a volume..............................................................................................................159

Deleting a volume.................................................................................................................160

To delete the volume........................................................................................................161

13 Using snapshots....................................................................................162

Types of snapshots................................................................................................................162

Uses and best practices for snapshots.................................................................................162

Planning snapshots...............................................................................................................163

Prerequisites for application-managed snapshots..................................................................164

Creating snapshots...............................................................................................................165

Editing a snapshot...........................................................................................................166

Scheduling snapshots............................................................................................................166

Best practices for scheduling snapshots of volumes...............................................................166

Requirements for snapshot schedules..................................................................................167

Scheduling snapshots for volume sets..................................................................................167

Creating a schedule to snapshot a volume..........................................................................168

Editing scheduled snapshots.........................................................................................169

Pausing and resuming scheduled snapshots....................................................................169

Deleting schedules to snapshot a volume........................................................................170

Scripting snapshots......................................................................................................170

Mounting a snapshot............................................................................................................170

Mounting the snapshot on a host.......................................................................................170

Making a Windows application-managed snapshot available...............................................171

Managing snapshot temporary space.................................................................................173

Convert the temporary space to access data...................................................................173

Contents 9

Delete the temporary space..........................................................................................173

Rolling back a volume to a snapshot or clone point...................................................................174

Rolling back a volume to a snapshot or clone point..............................................................174

Continue with standard roll back...................................................................................175

Create a new SmartClone volume from the snapshot........................................................175

Roll back all associated volumes....................................................................................176

Cancel the rollback operation.......................................................................................177

Deleting a snapshot..............................................................................................................177

14 SmartClone volumes..............................................................................178

What are SmartClone volumes?.............................................................................................178

Prerequisites....................................................................................................................178

SmartClone volume terminology.........................................................................................178

Example scenarios for using SmartClone volumes.................................................................179

Deploy multiple virtual or boot-from-SAN servers.............................................................179

Scenario: Computer training lab...............................................................................179

Safely use production data for test, development, and data mining....................................180

Test and development.............................................................................................180

Data mining..........................................................................................................180

Clone a volume..........................................................................................................180

Planning SmartClone volumes................................................................................................180

Space requirements..........................................................................................................180

Naming convention for SmartClone volumes........................................................................181

Naming and multiple identical disks in a server..............................................................181

Server access..................................................................................................................181

Defining SmartClone volume characteristics..............................................................................181

Naming SmartClone volumes.................................................................................................182

Shared versus individual characteristics...................................................................................183

Clone point..........................................................................................................................185

Shared snapshot ..................................................................................................................187

Creating SmartClone volumes................................................................................................189

To create a SmartClone volume..............................................................................................189

Viewing SmartClone volumes.................................................................................................190

Map view.......................................................................................................................190

Using views................................................................................................................191

Viewing clone points, volumes, and snapshots................................................................192

Editing SmartClone volumes...................................................................................................193

To edit the SmartClone volumes.........................................................................................194

Deleting SmartClone volumes.................................................................................................194

Deleting the clone point ...................................................................................................194

Deleting multiple SmartClone volumes................................................................................195

15 Working with scripting..........................................................................196

Documentation.....................................................................................................................196

16 Controlling server access to volumes........................................................197

Planning server connections to management groups..................................................................198

Planning iSCSI server connections to management groups.....................................................198

Adding an iSCSI server connection....................................................................................199

Editing an iSCSI server connection.....................................................................................199

Deleting an iSCSI server connection...................................................................................200

Completing the iSCSI Initiator and disk setup...........................................................................200

Persistent targets or favorite targets.....................................................................................200

HP LeftHand DSM for Microsoft MPIO settings.....................................................................200

Disk management............................................................................................................200

Planning Fibre Channel server connections to management groups.............................................201

10 Contents

Adding a Fibre Channel server connection..........................................................................201

Manually configuring a Fibre Channel initiator....................................................................201

Deleting a manually configured Fibre Channel initiator....................................................202

Editing a Fibre Channel server connection...........................................................................202

Deleting a Fibre Channel server connection.........................................................................202

Completing the Fibre Channel setup...................................................................................202

Clustering server connections.................................................................................................203

Requirements for clustering servers.....................................................................................203

Creating a server cluster...................................................................................................203

Viewing the relationship between storage systems, volumes, and servers.................................204

Editing a server cluster......................................................................................................204

Deleting a server cluster....................................................................................................204

Assigning iSCSI server connections access to volumes...............................................................205

Assigning server iSCSI connections from a volume................................................................206

Assigning volumes from an iSCSI connection.......................................................................206

Assigning volumes to Fibre Channel servers.............................................................................206

Assigning Fibre Channel servers from a volume....................................................................207

Assigning volumes from a Fibre Channel server...................................................................207

Assigning a boot volume to a Fibre Channel server..............................................................207

Editing server connection and volume assignments....................................................................207

17 Monitoring performance .......................................................................209

Prerequisites.........................................................................................................................209

Introduction to using performance information..........................................................................209

What can I learn about my SAN?......................................................................................209

Current SAN activities example.....................................................................................210

Workload characterization example..............................................................................210

Fault isolation example.....................................................................................................210

What can I learn about my volumes?......................................................................................211

Most active volumes examples...........................................................................................211

Activity generated by a specific server example...................................................................212

Planning for SAN improvements.............................................................................................212

Network utilization to determine if NIC bonding could improve performance example..............212

Load comparison of two clusters example............................................................................213

Load comparison of two volumes example...........................................................................213

Accessing and understanding the Performance Monitor window.................................................214

Performance Monitor toolbar.............................................................................................215

Performance monitor graph...............................................................................................215

Performance monitor table................................................................................................216

Understanding the performance statistics.............................................................................217

Monitoring and comparing multiple clusters.............................................................................219

Performance monitoring and analysis concepts.........................................................................219

Workloads......................................................................................................................219

Access type.....................................................................................................................219

Access size.....................................................................................................................220

Access pattern.................................................................................................................220

Queue depth...................................................................................................................220

Changing the sample interval and time zone............................................................................220

Adding statistics...................................................................................................................220

Viewing statistic details.....................................................................................................221

Removing and clearing statistics.............................................................................................222

Removing a statistic..........................................................................................................222

Clearing the sample data..................................................................................................222

Clearing the display.........................................................................................................222

Resetting defaults.............................................................................................................222

Contents 11

Pausing and restarting monitoring...........................................................................................222

Changing the graph.............................................................................................................223

Hiding and showing the graph..........................................................................................223

Displaying or hiding a line................................................................................................223

Changing the color or style of a line..................................................................................223

Highlighting a line...........................................................................................................223

Changing the scaling factor..............................................................................................224

Exporting data.....................................................................................................................224

Exporting statistics to a CSV file.........................................................................................224

Saving the graph to an image file......................................................................................225

18 Registering advanced features................................................................226

Evaluation period for using advanced features..........................................................................226

Starting the evaluation period............................................................................................226

Backing out of Remote Copy evaluation..............................................................................227

Scripting evaluation..............................................................................................................227

Turn on scripting evaluation...............................................................................................227

Turn off scripting evaluation...............................................................................................228

Registering advanced features................................................................................................228

Using license keys............................................................................................................228

Registering available storage systems for license keys...........................................................228

Registering storage systems in a management group.............................................................229

Saving and editing your customer information..........................................................................231

19 HP LeftHand Storage using iSCSI and Fibre Channel.................................233

iSCSI and HP LeftHand Storage..............................................................................................233

Number of iSCSI sessions.................................................................................................233

VIPs...............................................................................................................................233

iSNS server.....................................................................................................................233

iSCSI load balancing.......................................................................................................233

Authentication (CHAP)......................................................................................................234

iSCSI and CHAP terminology............................................................................................235

Example iSCSI configurations........................................................................................235

Use the HP LeftHand DSM for Microsoft MPIO.....................................................................237

Fibre Channel and HP LeftHand Storage..................................................................................237

Creating Fibre Channel connectivity...................................................................................238

Zoning.......................................................................................................................238

Using MPIO with Fibre Channel.........................................................................................238

Adding the MPIO Device Hardware ID..........................................................................238

20 Using the Configuration Interface............................................................239

Connecting to the Configuration Interface................................................................................239

Establishing a terminal emulation session on a Windows system.............................................239

Establishing a terminal emulation session on a Linux/UNIX system..........................................239

Opening the Configuration Interface from the terminal emulation session.................................240

Logging in to the Configuration Interface.................................................................................240

Configuring administrative users.............................................................................................240

Configuring a network connection..........................................................................................240

Deleting a NIC bond............................................................................................................241

Setting the TCP speed, duplex, and frame size..........................................................................241

Removing a storage system from a management group..............................................................242

Resetting the storage system to factory defaults.........................................................................242

21 Replacing hardware..............................................................................243

Replacing disks and rebuilding data.......................................................................................243

Replacing disks...............................................................................................................243

Verify the storage system is not running a manager..........................................................244

12 Contents

Repair the storage system.............................................................................................244

Rebuilding data...............................................................................................................245

Reconfigure RAID........................................................................................................245

Returning the storage system to the cluster...........................................................................246

Restarting a manager..................................................................................................246

Adding the repaired storage system to cluster.................................................................247

Rebuilding volume data....................................................................................................247

Controlling server access..............................................................................................247

Removing the ghost storage system.....................................................................................248

Returning the failed disk...............................................................................................248

Replacing the RAID controller.................................................................................................248

Verifying component failure...............................................................................................248

Removing the RAID controller............................................................................................250

Installing the RAID controller..............................................................................................253

Verifying proper operation................................................................................................254

22 SAN/iQ TCP and UDP port usage..........................................................255

23 Third-party licenses...............................................................................258

24 Support and other resources..................................................................259

Contacting HP......................................................................................................................259

Subscription service..........................................................................................................259

Rack stability........................................................................................................................259

Customer self repair..............................................................................................................259

HP Insight Remote Support Software........................................................................................259

Related information...............................................................................................................260

HP websites....................................................................................................................260

25 Documentation feedback.......................................................................261

Glossary..................................................................................................262

Index.......................................................................................................268

Contents 13

1 Getting started

HP LeftHand Storage enables you to create a virtualized pool of storage resources and manage a SAN. The SAN/iQ operating system is installed on the HP LeftHand Storage and you use the HP LeftHand Centralized Management Console (CMC) to manage the storage. For a list of supported software and hardware, see the HP LeftHand 4000 Storage Compatibility Matrix at

http://www.hp.com/go/LeftHandcompatibility

Creating storage with HP LeftHand Storage

HP LeftHand Storage supports both iSCSI and Fibre Channel storage networks. Using the wizard on the Getting Started Launch Pad, work through these steps to create a management group, cluster and volume.

The following sections provide an overview of the steps required to set up and configure your storage.

Creating iSCSI storage

1. Install storage systems on network, assign IPs and change the hostname using the Configuration

Interface. (See “Using the Configuration Interface” (page 239).)

2. Install an iSCSI Initiator on the application server.

3. Create a new management group or add storage systems to existing management group.

(See “Creating a storage volume using the Management Groups, Clusters, and Volumes

wizard” (page 15).)

4. Create an iSCSI server in CMC. (See “Enabling server access to volumes” (page 16))

5. Assign volumes to the iSCSI server. (See “Planning server connections to management groups”

(page 198).)

6. Discover targets in the iSCSI Initiator.

7. Finish creating storage as necessary, for example, initialize and partition disks in Microsoft

Windows.

Creating Fibre Channel storage

1. Install FC-enabled storage systems on network and fibre channel fabric, assign IPs and change

the hostname using the Configuration Interface. (See “Using the Configuration Interface” (page

239).)

IMPORTANT: Do not zone storage systems until they have been put into a management

group.

2. Ensure your initiator HBA driver is loaded and logged in to the Fibre Channel switches.

3. Ensure that appropriate MPIO support is loaded. For example, Microsoft Windows 2008 R2

or Windows 2012 uses the MS MPIO feature, configured for LEFTHANDP4000 disk

4. Configure storage systems by configuring 10 GbE NICs and appropriate bonding and SNMP.

Change RAID if desired.

5. Create a new management group with two or more FC–enabled storage systems. (See

“Creating a storage volume using the Management Groups, Clusters, and Volumes wizard” (page 15).)

NOTE: Adding two or more FC–enabled storage systems to an existing management group

creates FC connectivity.

6. Optional: Configure zoning on the fibre channel switches. Zone the switch connections using

either the port numbers or the WWNNs of the storage systems. Port-based zoning is

14 Getting started

recommended as the WWNNs based on the management group may change. (See the HP SAN Design Reference Guide.)

7. Create a Fibre Channel server in the CMC. (See “Planning Fibre Channel server connections

to management groups” (page 201))

8. Assign LUNs to the Fibre Channel server. (See “Assigning volumes to Fibre Channel servers”

(page 206).)

9. Discover the LUNs in the OS.

Configuring storage systems

All systems, including Failover Managers, that have not been added to a management group appear in the list of Available Systems in the navigation window. If you plan to use multiple storage systems, they must all be configured before you use them for clustered storage.

The most important categories to configure are:

• RAID—The storage system is shipped with RAID already configured and operational. Find

instructions for changing RAID, and for ensuring that drives in the storage system are properly configured and operating in “Configuring RAID and Managing Disks” (page 28).

• Network—Bond the NIC interfaces and set the frame size, NIC flow control, and speed and

duplex settings. Read detailed network configuration instructions in “Managing the network”

(page 45).

IMPORTANT: The network settings must be the same for the switches, clients, and storage

systems. Set up the end-to-end network before creating storage volumes.

1. From the navigation window, select a storage system in the Available Systems pool.

2. Open the tree underneath the storage system.

3. In the list of configuration categories, select the Storage category.

4. Select the RAID Setup tab and verify the RAID settings or change the RAID level.

5. In the list of configuration categories, select the Network category and configure the network

settings.

Creating a storage volume using the Management Groups, Clusters, and Volumes wizard

Select Getting Started in the navigation window to access the Getting Started Launch Pad. Select Management Groups, Clusters, and Volumes Wizard to create storage volumes.

The wizard takes you through creating the tasks of creating a management group, a cluster, and a storage volume. This storage hierarchy is depicted in Figure 1 (page 16).

Configuring storage systems 15

Figure 1 The SAN/iQ software storage hierarchy

1. Management group

2. Cluster

3. Volume

To complete this wizard, you will need the following information:

• A name for the management group.

• A storage system discovered on the network and then configured for RAID and the Network

settings

• DNS domain name, suffix, and server IP address for email event notification

• IP address or hostname and port of your email (SMTP) server for event notification

• A name for the cluster

• Virtual IP address to use for the cluster

• A name for the volume

• The size of the volume

NOTE: Names of management groups, clusters, volumes, and snapshots cannot be changed in

the future without deleting the management group.

Enabling server access to volumes

Create a server or server cluster to connect application servers to volumes. To create a server or server cluster, you must first have created a management group, a cluster, and at least one volume. You should also plan the following:

• The application servers that need access to volumes.

• The iSCSI initiator you plan to use. You need the server’s initiator name, and CHAP information

if you plan to use CHAP.

• For Fibre Channel access, have two Fibre Channel-enabled storage systems in the management

group.

See “Controlling server access to volumes” (page 197) for more information.

16 Getting started

Using the Map View

The Map View tab is available for viewing the relationships between management groups, servers, sites, clusters, volumes and snapshots. When you log in to a management group, there is a Map View tab for each of those elements in the management group. For example, when you want to make changes such as moving a volume to a different cluster, or deleting shared snapshots, the Map View allows you to easily identify how many snapshots and volumes are affected by such changes.

The Map View pane contains display tools to control and manipulate the view. The display tools are available from the Map View Tasks menu or from the tool bar across the top of the pane. The tools function the same from either the tool bar or the Map View tasks menu.

Using the display tools

Use these tools, described in Table 1 (page 17), to select specific areas of the map to view, zoom in on, rotate, and move around the window. If you have a complex configuration, use the Map View tools to easily view and monitor the configuration.

Table 1 Map View display tools

FunctionTool Icon

Zoom In—incrementally magnifies the Map View window.

Zoom Out—incrementally reduces the Map View window.

Magnify—creates magnification area, like a magnifying glass, that you can move over sections of the map view. Note that the magnify tool toggles on and off. You must click the icon to use it, and you must click the icon to turn it off.

Zoom to Fit—returns the map view to its default size and view.

Select to Zoom—allows you to select an area of the map view and zoom in on just that area.

Rotate—turns the map view 90 degrees at a time.

You can left-click in the Map View window and drag the map around the window

Click and drag

Using views and layouts

The views and layouts differ for each element of your network that uses the map view. For views and layouts available, see:

• Working with management groups, “Management group map view tab” (page 106)

• Controlling server access to volumes, “Viewing the relationship between storage systems,

volumes, and servers” (page 204)

• Sites, HP LeftHand Storage Multi-Site Configuration Guide

• Clusters, “Cluster Map View” (page 133)

• Volumes and Snapshots, “Viewing the volume map” (page 158)

• SmartClone volumes, “Using views” (page 191)

Using the Map View 17

Setting preferences

Use the Preferences window to set the following:

• Font size in the CMC

• Locale for the CMC. The locale determines the language displayed in the CMC.

• Naming conventions for storage elements

• Online upgrade options. See the HP LeftHand Storage Upgrade Instructions.

Setting the font size and locale

Use the Preferences window, opened from the Help menu, to set font size and locale in the CMC. Font sizes from 9 through 16 are available.

The CMC obtains the locale setting from your computer. If you change the locale on your computer and open the CMC, it uses the new locale, if available in the CMC.

You can override the locale setting from your computer by selecting a different locale in the CMC. Changing the locale in the CMC affects the language of the text that appears in the CMC and in the online help.

After changing the locale, you must close and reopen the CMC to see the change.

Setting naming conventions

Use the Preferences window, opened from the Help menu, to set naming conventions for elements you create when building the HP LeftHand Storage. You can use the default values or create your own set of customized values.

When you install the CMC for the first time, or upgrade from release 7.0.x, default names are enabled for snapshots, including schedules to snapshot a volume, and for SmartClone volumes. No default names are provided for management groups, clusters, and volumes.

Figure 2 Default naming conventions for snapshots and SmartClone volumes

Changing naming conventions

Change the elements that use a default naming convention or change the naming convention itself.

18 Getting started

If you use the given defaults, the resulting names look like those in Table 2 (page 19). Notice that the volume name carries into all the snapshot elements, including SmartClone volumes, which are created from a snapshot.

Table 2 Example of how default names work

ExampleDefault nameElement

VOL_VOL_ExchLogs_SS_3_1VOL_SmartClone Volumes

VOL_ExchLogs_SS_1_SS_Snapshots

VOL_RemoteBackup_RS_1_RS_Remote Snapshots

VOL_ExchLogs_Sch_SS_2.1_Sch_SS_Schedules to Snapshot a Volume

VOL_ExchLogs_Sch_RS_2_Pri.1, VOL_RemoteBackup_Sch_RS_1_Rmt.1

_Sch_RS_Schedules to Remote Snapshot a

Volume

If you delete all the default names from the Preferences Naming window, the only automatically generated naming elements that remain will incrementally number a series of snapshots or SmartClone volumes.

Troubleshooting

Storage systems not found

If the network has a lot of traffic, or if a storage system is busy reading or writing data, it may not be found when a search is performed. Try the following steps to find the storage system.

1. If the storage system you are looking for does not appear in the navigation window, search

again using the Find menu.

2. If you have searched using Auto Discover by Broadcast, try adding individual IP addresses

and clicking Find.

3. If you have searched by individual IP addresses, try searching by Auto Discover by Broadcast

instead.

4. If searching again does not work, try the following:

• Check the physical connection of the storage system.

• Wait a few minutes and try the search again. If activity to the storage system was frequent,

the storage system might not have responded to the search.

Other problems can prevent the CMC from finding a storage system:

• Extremely high network traffic to and from the storage system.

• The IP address could have changed if the storage system is configured to use DHCP (not

recommended).

• The storage system may have been rebooted and is not yet online.

• Power could have failed to a network switch to which the storage system is connected.

• The CMC might be running on a system that is on a different physical network than the storage

system. Poor network routing performance at the site may severely affect performance of the CMC.

Configuring remote support for HP LeftHand Storage

If you are using HP remote support, Table 3 (page 20) lists the required configuration tasks.

Troubleshooting 19

Table 3 CMC setup for remote support

For more information, seeTask

“Enabling SNMP agents” (page 92)Enable SNMP on each storage system

“Adding SNMP traps” (page 93)Set the SNMP trap recipient to IP address of the system

where the remote support client is installed

Your network administratorOpen port 8959 (used for the CLI)

“Adding an administrative user” (page 76)Set the management group login and password for a

read-only (View_Only_Administrator group) user

20 Getting started

2 Working with storage systems

Storage systems displayed in the navigation window have a tree structure of configuration categories under them, as shown in Figure 3 (page 21). The configuration categories provide access to the configuration tasks for individual storage systems. You must configure each storage system individually before using it in a cluster.

Figure 3 Storage system configuration categories

The configuration categories include the following:

• Diagnostics—Run hardware diagnostic tests, view current hardware status and configuration

information, and save log files.

• Network—For each storage system, configure and manage the network settings, including

network interface cards (NICs), the routing table, and which interface carries SAN/iQ communications.

• Storage—Manage RAID and the individual disks in the storage system.

Identifying the storage system hardware

Each HP LeftHand storage system is based on a specific HP platform. For general information about the underlying hardware of your HP LeftHand Storage model, such as LEDs, component identification, and replacing components, see the platform-specific documentation. Table 4 (page 21) identifies the HP platform used for each LeftHand model and a link to related information.

Table 4 HP platform identification

LinkDocumentationHP platformHP LeftHand model

http://www.hp.com/support/DL320s_UG_enHP ProLiant DL320s User

Guide

ProLiant DL320s

NSM 2120

http://www.hp.com/support/ DL185Gen5_MSG_en

HP ProLiant DL185 Generation 5 Maintenance and Service Guide

ProLiant DL185 G5

HP LeftHand P4300 HP LeftHand P4500

Contact HP Support for more information as this guide is not publicly available.

HP SE1220 Maintenance and Service Guide

SE1220HP P4300 G2

HP P4500 G2 HP P4900 G2

http://www.hp.com/support/ HP_P4800_G2_SAN_Solution_BladeSystem_MG_en

HP P4800 G2 SAN Solution for BladeSystem Maintenance Guide

ProLiant BL460c G7

P4800 G2

Identifying the storage system hardware 21

Table 4 HP platform identification (continued)

LinkDocumentationHP platformHP LeftHand model

http://www.hp.com/support/ BL460cG7_Server_Blade Maintenance and Service Blade_MSG_en

HP ProLiant BL460c G7 Server Blade Maintenance and Service Guide

http://www.hp.com/go/proliantgen8/docsHP ProLiant DL360p Gen8

Server Maintenance and Service Guide

ProLiant DL360p G8

HP LeftHand 4130 HP LeftHand 4330

Storage system tasks

Logging in to and out of storage systems

When storage systems are in the Available pool, you log in without a user name or password. Simply click the link Log in to view. When you use the Management Group, Clusters and Volumes wizard, selecting a storage system to use automatically logs in to that storage system. You can find the link to log in at the following locations:

• From the Available systems list in the Navigation window

• On individual storage system Details tabs

Logging out of a storage system

1. Select a storage system in the navigation window.

2. Right-click and select Log Out.

NOTE: If you are logged in to multiple storage systems, you must log out of each storage system

individually.

Changing the storage system hostname

The storage system arrives configured with a default hostname. Change the hostname as follows:

1. In the navigation window, log in to the storage system.

2. On the Details tab, click Storage System Tasks and select Edit Hostname.

3. Enter the new name, and click OK.

4. Click OK to finish.

NOTE: Add the hostname and IP pair to the hostname resolution methodology employed in your

environment, for example, DNS or WINS.

Locating the storage system in a rack

The Set ID LED illuminates lights on the physical storage system to aid in physically locating that storage system in a rack. The Set ID LED is available depending on the model of the storage system.

1. Select a storage system in the navigation window and log in.

2. Click Storage System Tasks on the Details tab and select Set ID LED On.

The ID LED on the front of the storage system is now a bright blue. Another ID LED is located on the back of the storage system.

When you click Set ID LED On, the status changes to On.

3. Select Set ID LED Off when you have finished.

The LED on the storage system turns off.

22 Working with storage systems

Powering off or rebooting the storage system

Reboot or power off the storage system from the CMC. Set the amount of time before the process begins, to ensure that all activity to the storage system has stopped.

Powering off the storage system through the CMC physically powers it off. The CMC controls the power down process so that data is protected.

Powering off an individual storage system is appropriate for servicing or moving that storage system. However, if you want to shut down more than one storage system in a management group, you should shut down the management group instead of individually powering off the storage systems in that group. See “Shutting down a management group” (page 114).

IMPORTANT:

• Before powering off or rebooting the storage system, ensure that volumes will not go offline

by checking the storage system Availability tab. See “Determining volume and snapshot

availability ” (page 25).

• You should also verify that you have the proper number of managers and possibly a Failover

Manager to ensure that quorum is maintained. See “Managers and quorum” (page 119).

Powering on or off, or rebooting storage systems with modular components

Some storage systems are comprised of modular components, that may include:

• Disk enclosure

• Server blades enclosure

• System controller

The P4800 is an example of a storage system that is comprised of modular components. Power on the components in the following order:

1. Disk enclosure.

2. Server blades enclosure or system controller.

Allow up to 6 minutes for the system controller to come up completely and be discovered by the CMC. If the CMC cannot find the storage system after 6 minutes, contact Customer Support.

3. If you do not power on the disk enclosure first, the Storage System Details tab shows the status

with No Formatted Devices Available.

Figure 4 Disk enclosure not found as shown in Details tab

Powering off or rebooting the storage system 23

When powering off the storage system, be sure to power off the components in the following order:

1. Power off the server blades enclosure or system controller from the CMC as described in

“Powering off the storage system” (page 24).

2. Manually power off the disk enclosure.

When you reboot the storage system, use the CMC, as described in “Rebooting the storage system”

(page 24). This process reboots only the server blades enclosure or the system controller.

Rebooting the storage system

1. Select a storage system in the navigation window and log in.

2. Click Storage System Tasks on the Details tab and select Power Off or Reboot.

3. In the minutes field, enter the number of minutes before the reboot should begin.

Enter any whole number greater than or equal to 0. If you enter 0, the storage system reboots shortly after you confirm the reboot.

NOTE: If you enter 0 for the value when rebooting, you cannot cancel the action. Any value

greater than 0 allows you to cancel before the reboot actually takes place.

4. Select Reboot to perform a software reboot without a power cycle.

5. Click OK.

The storage system starts the reboot in the specified number of minutes. The reboot takes several minutes.

6. Search for the storage system to reconnect the CMC to the storage system once it has finished

rebooting.

Powering off the storage system

1. Log in to the storage system.

2. Select Storage System Tasks on the Details tab and select Power Off or Reboot.

3. Select Power Off.

The button changes to Power Off.

4. In the minutes field, enter the number of minutes before the powering off should begin.

Enter any whole number greater than or equal to 0. If you enter 0, the storage system powers off shortly after you confirm the power off.

NOTE: If you enter 0 for the value when powering off, you cannot cancel the action. Any

value greater than 0 allows you to cancel before the power off actually takes place.

5. Click Power Off.

24 Working with storage systems

Figure 5 Confirming storage system power off

Depending on the configuration of the management group and volumes, your volumes and snapshots can remain available.

Upgrading SAN/iQ on storage systems

The CMC enables online upgrades for storage systems, including the latest software releases and patches. See the HP LeftHand Storage Upgrade Instructions.

Registering advanced features for a storage system

Using the Feature Registration tab, register individual storage systems for advanced features. For more information about registering advanced features, see “Registering advanced features”

(page 226).

Determining volume and snapshot availability

The Availability tab displays which volumes’ and snapshots’ availability depends on this storage system staying online. Details include the data protection level and what factors contribute to the availability status, such as the status of storage systems participating in any replication or a RAID restripe in progress.

Upgrading SAN/iQ on storage systems 25

Figure 6 Availability tab

Checking status of dedicated boot devices

Some storage systems contain either one or two dedicated boot devices. Dedicated boot devices may be compact flash cards or hard drives. If a storage system has dedicated boot devices, the Boot Devices tab appears in the Storage configuration category. Storage systems that do not have dedicated boot devices will not display the Boot Devices tab.

In storage systems with two dedicated boot devices, both devices are active by default. If necessary, compact flash cards can be deactivated or activated using the buttons on this tab. However, you should only take action on these cards if instructed by HP Technical Support.

Checking boot device status

View dedicated boot device status in the Boot Devices tab window in the Storage category in the storage system tree.

Getting there

1. Select a storage system in the navigation window and log in if necessary.

2. Open the tree below the storage system and select Storage.

3. Select the Boot Devices tab.

The status of each dedicated boot device on the storage system is listed in the Status column.

Table 5 (page 27) describes the possible status for boot devices.

NOTE: Some statuses only occur in a storage system with two boot devices.

26 Working with storage systems

Table 5 Boot device status

DescriptionBoot device status

The device is synchronized and ready to be used.Active

The device is ready to be removed from the storage system. It will not be used to boot the storage system.

Inactive

The device encountered an I/O error and is not ready to be used.

Failed

The device has not yet been used in a storage system. It is ready to be activated.

Unformatted

The device is not recognized as a boot device.Not Recognized

The device cannot be used. (For example, the compact flash card is the wrong size or type.)

Unsupported

NOTE: When the status of a boot device changes, an event is generated. See “Alarms and events

overview” (page 84).

Replacing a dedicated boot device

If a boot hard drive fails, you will see an event that the boot device is faulty. Replace it with a new drive. The boot device drives support hot swapping and do not require activation.

Checking status of dedicated boot devices 27

3 Configuring RAID and Managing Disks

For each storage system, you can select the RAID configuration and the RAID rebuild options, and monitor the RAID status. You can also review disk information and, for some models, manage individual disks.

Getting there

1. In the navigation window, select a storage system and log in if necessary.

2. Open the tree under the storage system and select the Storage category.

Figure 7 Viewing the storage configuration category for a storage system

Columns in the RAID Setup tab show four categories:

• Device Name

• Device Type or the RAID level

• Device Status

• Subdevices

NOTE: For hardware-specific LED information for your storage system, see “Identifying the storage

system hardware” (page 21) for document titles and document links.

Configuring and managing RAID

Managing the RAID settings of a storage system includes:

• Choosing the right RAID configuration for your storage needs

• Setting or changing the RAID configuration, if necessary

• Setting the rate for rebuilding RAID

• Monitoring the RAID status for the storage system

• Reconfiguring RAID when necessary

RAID Levels

The availability of certain RAID levels is determined by the number of storage system hard drives.

Table 6 Descriptions of RAID levels

DescriptionRAID level

Offers a good combination of data protection and performance. RAID 1 or drive mirroring creates fault

RAID 1 – Mirroring

tolerance by storing duplicate sets of data on a minimum of two hard drives. There must be an even number of drives for RAID 1. RAID 1 and RAID 1+0(10) are the most costly fault tolerance methods because they require 50 percent of the drive capacity to store the redundant data. RAID 1

28 Configuring RAID and Managing Disks

Table 6 Descriptions of RAID levels (continued)

DescriptionRAID level

mirrors the contents of one hard drive in the array onto another. If either hard drive fails, the other hard drive provides a backup copy of the files and normal system operations are not interrupted.

Offers the best combination of data protection and performance. RAID 1+0 or drive mirroring creates fault

RAID 1+0 – Mirroring and Striping

tolerance by storing duplicate sets of data on a minimum of four hard drives. There must be an even number of drives for RAID 1+0. RAID 1+0(10) and RAID 1 are the most costly fault tolerance methods because they require 50 percent of the drive capacity to store the redundant data. RAID 1+0(10) first mirrors each drive in the array to another, and then stripes the data across the mirrored pair. If a physical drive fails, the mirror drive provides a backup copy of the files and normal system operations are not interrupted. RAID 1+0(10) can withstand multiple simultaneous drive failures, as long as the failed drives are not mirrored to each other.

Offers the best combination of data protection and usable capacity while also improving performance over RAID 6.

RAID 5

RAID 5 stores parity data across all the physical drives in the array and allows more simultaneous read operations and higher performance. If a drive fails, the controller uses the parity data and the data on the remaining drives to reconstruct data from the failed drive. The system continues operating with a slightly reduced performance until you replace the failed drive. RAID 5 can only withstand the loss of one drive without total array failure. It requires an array with a minimum of three physical drives. Usable capacity is N-1 where N is the number of physical drives in the logical array.

Offers the best data protection and is an extension of RAID

5. RAID 6 uses multiple parity sets to store data and can

RAID 6

therefore tolerate up to 2 drive failures simultaneously. RAID 6 requires a minimum of 4 drives. Performance is lower than RAID 5 due to parity data updating on multiple drives. RAID 6 uses two disk for parity; its fault tolerance allows two disks to fail simultaneously. Usable capacity is N-2 where N is the number of physical drives in the logical array.

Explaining RAID devices in the RAID setup report

In the Storage category, the RAID Setup tab lists the RAID devices in the storage system and provides information about them. An example of the RAID setup report is shown in Figure 8 (page 29). Information listed in the report is described in Table 7 (page 30).

Figure 8 RAID setup report

Explaining RAID devices in the RAID setup report 29

RAID devices by RAID type

Each RAID type creates different sets of RAID devices. Table 7 (page 30) contains a description of the variety of RAID devices created by the different RAID types as implemented on various storage systems.

Table 7 Information in the RAID setup report

Describes thisThis item

The disk sets used in RAID. The number and names of devices varies by storage system and RAID level.

Device Name

The RAID level of the device. For example, in a HP P4300 G2, RAID 5 displays a Device Type of RAID 5 and subdevices as 8.

Device Type

The RAID status of the device. Status is one of the following:

Device Status

• Normal—green

• Degraded—yellow

• Off—red

• Rebuilding—blue

The number of disks included in the device.Subdevices

Virtual RAID devices

If you are using the VSA, the only RAID available is virtual RAID. After installing the VSA, virtual RAID is configured automatically if you first configured the data disk in the VI Client.

HP recommends installing VSA for vSphere on top of a server with a RAID 5 or RAID 6 configuration.

Planning the RAID configuration

Plan the RAID configuration for storage systems based on a balance between data high availability or fault tolerance, I/O performance, and usable capacity.

CAUTION: Plan your RAID configuration carefully. After you have configured RAID, you cannot

change the RAID configuration without deleting all data on the storage system.

Data protection

Keeping multiple copies of your data ensures that data is safe and remains available in the case of disk failure. HP recommends using both disk RAID and Network RAID to insure high availability:

• Configure RAID 1, RAID 10, RAID 5, or RAID 6 within each storage system to ensure data

redundancy.

• Always use Network RAID to mirror data volumes across storage systems in a cluster, regardless

of RAID level, for added data protection and high availability .

Using RAID for data redundancy

Within each storage system, RAID 1 or RAID 10 ensures that two copies of all data exist. If one of the disks in a RAID pair goes down, data reads and writes continue on the other disk. Similarly, RAID 5 or RAID 6 provides redundancy by spreading parity evenly across the disks in the set.

If one disk in a RAID 5 set, or two disks in a RAID 6 set goes down, data reads and writes continue on the remaining disks in the set.

RAID protects against failure of disks within a storage system, but not against failure of an entire storage system. For example, if network connectivity to the storage system is lost, then data reads and writes to the storage system cannot continue.

30 Configuring RAID and Managing Disks

+ 252 hidden pages

HP StoreVirtual 4000, LeftHand Storage User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual