User’s Guide
Quantum DXi4000
6-67092-03 Rev A
Quantum DXi4000 User’s Guide, 6-67092-03 Rev A, October 2011, Product of USA.
This document is for DXi 2.0.x Software.
Quantum Corporation provides this publication “as is” without warranty of any kind, either express or
implied, including but not limited to the implied warranties of merchantability or fitness for a particular
purpose. Quantum Corporation may revise this publication from time to time without notice.
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© 2011 Quantum Corporation. All rights reserved.
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violation of the law.
TRADEMARK STATEMENT
Quantum, the Quantum logo, DLT, DLTtape, the DLTtape logo, SuperLoader, Scalar, and DXi are
registered trademarks of Quantum Corporation, registered in the U.S. and other countries.
Preserving the World's Most Important Data. Yours., Backup. Recovery. Archive. It’s What We Do., the
DLT logo, DLTSage, Dynamic Powerdown, FastSense, FlexLink, GoVault, MediaShield, Optyon, Pocketsized. Well-armored, SDLT, SiteCare, SmartVerify, StorageCare, Super DLTtape, and Vision are trademarks
of Quantum.
LTO and Ultrium are trademarks of HP, IBM, and Quantum in the U.S. and other countries. All other
trademarks are the property of their respective companies.
Specifications are subject to change without notice.
ii Quantum DXi4000 User’s Guide
Contents
Preface xvii
Chapter 1 DXi4000 System Description 1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
What’s New in DXi 2.0.x Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Data Reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Data Deduplication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Space Reclamation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Remote Replication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DXi4000 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Hard Drive Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
HDDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Network Attached Storage (NAS) . . . . . . . . . . . . . . . . . . . . . . 10
OpenStorage (OST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Supported RAID Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
DXi Advanced Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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Network Segmentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
DXi4000 Segmentation Options . . . . . . . . . . . . . . . . . . . . . . . 15
Network Segmentation Scenarios . . . . . . . . . . . . . . . . . . . . . . 16
Chapter 2 Basic Operations 19
DXi4000 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
System Front Panel Features and Indicators . . . . . . . . . . . . . . 20
System Back Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . 22
Hard Drive Carrier Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Ethernet Port Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Power Supply Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Turning On and Shutting Down the System . . . . . . . . . . . . . . . . . . . . 26
Locating Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Chapter 3 DXi4000 Remote Management 29
Accessing Remote Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Supported Browsers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Logging On to the DXi4000 . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Logging Off of the DXi4000 . . . . . . . . . . . . . . . . . . . . . . . . . . 32
The Remote Management Console . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
System Banner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
DXi4000 Management Pages . . . . . . . . . . . . . . . . . . . . . . . . . 36
Chapter 4 DXi4000 Configuration Wizards 43
NAS Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Step 1: About . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Step 2: Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Step 3: Windows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Step 4: Add Share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Step 5: Confirm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
OST Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Step 1: About . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Step 2: Add Storage Servers . . . . . . . . . . . . . . . . . . . . . . . . . . 51
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Step 3: Add LSUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Step 4: Add Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Step 5: Confirm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Step 6: Download OST Client Plug-In . . . . . . . . . . . . . . . . . . . 55
Replication Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Step 1: About . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Step 2: System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Step 3: NAS Shares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Step 4: Confirm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Email Alerts Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Step 1: About . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Step 2: Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Step 3: Recipients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Step 4: Confirm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Support Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Step 1: About . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Step 2: Licensed Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Step 3: Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Step 4: Guardian. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Step 5: System Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Chapter 5 DXi4000 Home Page 71
DXi4000 System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Disk Usage Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Data Reduction Statistics Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Replication Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Current Activity Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Scheduled Activity Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Chapter 6 DXi4000 Replication 81
Understanding Data Replication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Replication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Directory/File Based Replication . . . . . . . . . . . . . . . . . . . . . . . 83
OST Optimized Duplication. . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Performing Data Replication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
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Task Overview: Setting Up and Performing Replication. . . . . . 85
Task Overview: Setting Up and Performing Directory/File
Based Replication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Task Overview: Recovering a Replicated Share . . . . . . . . . . . . 87
Task Overview: Performing a Share Failback . . . . . . . . . . . . . . 87
Send NAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Shares Eligible for Replication. . . . . . . . . . . . . . . . . . . . . . . . . 89
Enabling Replication For a Share. . . . . . . . . . . . . . . . . . . . . . . 91
Configuring a Replication Schedule For a Share . . . . . . . . . . . 93
Configuring a Source Share for Directory/File Based
Replication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Replicating a Share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Synchronizing a Share. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Directory/File Based Queue . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Receive NAS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Received Snapshots. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Recovery Jobs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Failback Jobs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Directory/File Based. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Replication Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Replication State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Replication Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Chapter 7 DXi4000 Status 113
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Firmware Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Inline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
RAID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
CPU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Disk Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
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Data Reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Chapter 8 DXi4000 Alerts 127
Admin Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Service Tickets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Service Ticket Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Recommended Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Working With Service Tickets . . . . . . . . . . . . . . . . . . . . . . . . 130
Chapter 9 DXi4000 Configuration 137
NAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
NAS Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Windows Domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Share Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Advanced Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Replication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Replication Send . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Replication Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
OST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Storage Servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
LSU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Manage Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
OST Client Plug-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Date & Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Notifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Email. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
SNMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Company . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Primary and Secondary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Chapter 10 DXi4000 Utilities 223
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Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
System Diag File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Storage Array Diag File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
DSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Healthchecks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Disk. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Space Reclamation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
License Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
License Key List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Adding a License Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Software Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Reboot & Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
Appendix A DXi4000 System Specifications 249
Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . 252
Appendix B Troubleshooting 255
DXi4000 Status and Problem Reporting . . . . . . . . . . . . . . . . . . . . . . 255
General Troubleshooting Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Viewing Service Tickets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Checking Hardware Status . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Downloading a System Diagnostics File . . . . . . . . . . . . . . . . 257
Common Problems and Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Start-up Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Hardware Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Ethernet Network Problems . . . . . . . . . . . . . . . . . . . . . . . . . 259
Replication Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Temperature Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Glossary 265
viii Quantum DXi4000 User’s Guide
Figures
Figure 1 DXi4000 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 2 DXi4000 Drive Slot Numbering. . . . . . . . . . . . . . . . . . . . . 10
Figure 3 DXi4000 Drive Carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 4 NAS Backup using CIFS and NFS . . . . . . . . . . . . . . . . . . . . 12
Figure 5 OpenStorage (OST) Example. . . . . . . . . . . . . . . . . . . . . . . 13
Figure 6 DXi4000 RAID Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 7 DXi4000 System Front View . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 8 System Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 9 Hard Drive Carrier LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 10 Ethernet Port LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 11 Power Supply LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 12 Power Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 13 Login Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 14 Home Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 15 System Banner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 16 Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 17 Wizards Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 18 NAS Wizard: About. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Quantum DXi4000 User’s Guide ix
Figures
Figure 19 NAS Wizard: Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 20 NAS Wizard: Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 21 NAS Wizard: Add Share . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 22 NAS Wizard: Confirm . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 23 OST Wizard: About . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 24 OST Wizard: Add Storage Servers . . . . . . . . . . . . . . . . . . . 52
Figure 25 OST Wizard: Add LSUs . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 26 OST Wizard: Add Users . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 27 OST Wizard: Confirm . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 28 OST Wizard: Download OST Client Plug-in . . . . . . . . . . . . 55
Figure 29 Replication Wizard: About . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 30 Replication Wizard: System. . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 31 Replication Wizard: NAS Shares . . . . . . . . . . . . . . . . . . . . 60
Figure 32 Replication Wizard: Confirm . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 33 Email Alerts Wizard: About. . . . . . . . . . . . . . . . . . . . . . . . 62
Figure 34 Email Alerts Wizard: Server. . . . . . . . . . . . . . . . . . . . . . . . 63
Figure 35 Email Alerts Wizard: Recipients. . . . . . . . . . . . . . . . . . . . . 64
Figure 36 Email Alerts Wizard: Confirm . . . . . . . . . . . . . . . . . . . . . . 65
Figure 37 Support Wizard: About. . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 38 Support Wizard: Licensed Features . . . . . . . . . . . . . . . . . . 67
Figure 39 Support Wizard: Registration . . . . . . . . . . . . . . . . . . . . . . 68
Figure 40 Support Wizard: Guardian . . . . . . . . . . . . . . . . . . . . . . . . 69
Figure 41 Support Wizard: System Log. . . . . . . . . . . . . . . . . . . . . . . 70
Figure 42 Home Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Figure 43 DXi4000 System Overview . . . . . . . . . . . . . . . . . . . . . . . . 73
Figure 44 Disk Usage Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Figure 45 Data Reduction Statistics Overview. . . . . . . . . . . . . . . . . . 75
Figure 46 Replication Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 47 Current Activity Overview . . . . . . . . . . . . . . . . . . . . . . . . . 79
x Quantum DXi4000 User’s Guide
Figures
Figure 48 Scheduled Activity Overview . . . . . . . . . . . . . . . . . . . . . . . 80
Figure 49 Send NAS Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Figure 50 Edit NAS Share Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Figure 51 Directory/File Based Queue . . . . . . . . . . . . . . . . . . . . . . . . 96
Figure 52 Received Snapshots Page . . . . . . . . . . . . . . . . . . . . . . . . . 98
Figure 53 Recovered Share Name Page . . . . . . . . . . . . . . . . . . . . . 100
Figure 54 Failback Target Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Figure 55 Recovery Jobs Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Figure 56 Failback Jobs Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Figure 57 Directory/File Based Page . . . . . . . . . . . . . . . . . . . . . . . . 106
Figure 58 Edit Share Settings Page . . . . . . . . . . . . . . . . . . . . . . . . . 107
Figure 59 Unpack Queue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Figure 60 Actions Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Figure 61 Reports Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Figure 62 Hardware Summary Page . . . . . . . . . . . . . . . . . . . . . . . . 114
Figure 63 System Board Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Figure 64 Network Ports Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Figure 65 Storage Arrays Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Figure 66 Firmware Version Page . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Figure 67 Inline Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Figure 68 Ethernet Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Figure 69 RAID Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Figure 70 CPU Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Figure 71 Disk Usage Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Figure 72 Admin Alerts Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Figure 73 Service Tickets Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Figure 74 Ticket Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Figure 75 Recommended Actions . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Figure 76 Ticket Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Quantum DXi4000 User’s Guide xi
Figures
Figure 77 Email Ticket Information. . . . . . . . . . . . . . . . . . . . . . . . . 135
Figure 78 NAS Summary Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Figure 79 Add NAS Share Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Figure 80 Edit NAS Share & Replication Settings Page . . . . . . . . . . 142
Figure 81 Windows Domain Page . . . . . . . . . . . . . . . . . . . . . . . . . 144
Figure 82 Share Access Page (Windows Workgroup) . . . . . . . . . . . 148
Figure 83 Share Access Page (Active Directory) . . . . . . . . . . . . . . . 148
Figure 84 Add Workgroup User Page . . . . . . . . . . . . . . . . . . . . . . . 150
Figure 85 Add Share Administrator Page . . . . . . . . . . . . . . . . . . . . 151
Figure 86 Edit Workgroup User Page . . . . . . . . . . . . . . . . . . . . . . . 152
Figure 87 Advanced Setting Page. . . . . . . . . . . . . . . . . . . . . . . . . . 154
Figure 88 Replication Send Page . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Figure 89 Replication Receive Page. . . . . . . . . . . . . . . . . . . . . . . . . 157
Figure 90 Storage Servers Page . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Figure 91 Add Storage Server Page . . . . . . . . . . . . . . . . . . . . . . . . 163
Figure 92 Edit Storage Server Page. . . . . . . . . . . . . . . . . . . . . . . . . 165
Figure 93 LSU Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Figure 94 Add Logical Storage Unit Page . . . . . . . . . . . . . . . . . . . . 168
Figure 95 Edit Logical Storage Unit Page . . . . . . . . . . . . . . . . . . . . 170
Figure 96 Manage Users Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Figure 97 Add Authenticated User Page. . . . . . . . . . . . . . . . . . . . . 173
Figure 98 Edit Authenticated User Page . . . . . . . . . . . . . . . . . . . . . 174
Figure 99 Basic Network Configuration . . . . . . . . . . . . . . . . . . . . . 178
Figure 100 Custom Network Configuration . . . . . . . . . . . . . . . . . . . 181
Figure 101 Segmented Network Configuration . . . . . . . . . . . . . . . . 187
Figure 102 Date & Time Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Figure 103 Web & CLI Passwords Page. . . . . . . . . . . . . . . . . . . . . . . 193
Figure 104 SSL Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Figure 105 Install New Certificate Page . . . . . . . . . . . . . . . . . . . . . . 198
xii Quantum DXi4000 User’s Guide
Figures
Figure 106 Login Session Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Figure 107 Recipients Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Figure 108 Add Email Recipient Page . . . . . . . . . . . . . . . . . . . . . . . . 202
Figure 109 Edit Email Recipient Page . . . . . . . . . . . . . . . . . . . . . . . . 203
Figure 110 Server Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Figure 111 Email Test Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Figure 112 Schedule Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Figure 113 On Demand Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Figure 114 Destinations Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Figure 115 Add Trap Destination Page . . . . . . . . . . . . . . . . . . . . . . . 211
Figure 116 Edit Trap Destination Page . . . . . . . . . . . . . . . . . . . . . . . 213
Figure 117 Community Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Figure 118 Add SNMP Community Page . . . . . . . . . . . . . . . . . . . . . 215
Figure 119 Edit SNMP Community Page. . . . . . . . . . . . . . . . . . . . . . 217
Figure 120 SNMP Test Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Figure 121 Company Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Figure 122 Primary and Secondary Pages . . . . . . . . . . . . . . . . . . . . . 221
Figure 123 System Diag File Page . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Figure 124 Storage Array Diag File Page. . . . . . . . . . . . . . . . . . . . . . 226
Figure 125 DSET Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Figure 126 General Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Figure 127 Status Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Figure 128 Edit Healthcheck Page . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Figure 129 Schedule Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Figure 130 Performance Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Figure 131 Settings Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Figure 132 Disk Analyzer Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Figure 133 General Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Figure 134 Schedule Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Quantum DXi4000 User’s Guide xiii
Figures
Figure 135 License Keys Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Figure 136 License Key Management Page. . . . . . . . . . . . . . . . . . . . 241
Figure 137 License Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Figure 138 Software Upgrade Page . . . . . . . . . . . . . . . . . . . . . . . . . 244
Figure 139 Activate/Remove Software Image . . . . . . . . . . . . . . . . . . 245
Figure 140 Reboot & Shutdown Page. . . . . . . . . . . . . . . . . . . . . . . . 247
xiv Quantum DXi4000 User’s Guide
Ta b l e s
Table 1 DXi4000 System - Front Panel LED Indicators, Buttons,
and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 2 Rear Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 3 DXi4000 Model Number. . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 4 Menu Items and Management Pages . . . . . . . . . . . . . . . . 36
Table 5 Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Table 6 Storage Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Table 7 Cable Drops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Table 8 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Table 9 Power Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Table 10 Environmental Specifications . . . . . . . . . . . . . . . . . . . . . 253
Table 11 Start-up Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Table 12 Hardware Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Table 13 Ethernet Network Problems . . . . . . . . . . . . . . . . . . . . . . 260
Table 14 Replication Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Quantum DXi4000 User’s Guide xv
Tables
xvi Quantum DXi4000 User’s Guide
Preface
This manual introduces the Quantum DXi4000 enhanced data
protection systems and discusses:
• System operations
• Configuration
•Web interface
• Basic troubleshooting
Audience This manual is written for DXi4000 administrators and field service
engineers.
Note: It is useful for the audience to have a basic understanding of
UNIX® and backup/recovery systems.
Document Organization Following is a brief description of chapter contents.
• Chapter 1, DXi4000 System Description provides an overview of the
DXi4000.
• Chapter 2, Basic Operations provides basic operating instructions
for the DXi4000.
Quantum DXi4000 User’s Guide xvii
Preface
• Chapter 3, DXi4000 Remote Management discusses using the
DXi4000 remote management console to control the system
remotely.
• Chapter 4, DXi4000 Configuration Wizards discusses the wizards
that provide guidance for setting up the DXi4000.
• Chapter 5, DXi4000 Home Page discusses the information that
appears on the Home page of the remote management console.
• Chapter 6, DXi4000 Replication discusses the remote replication
capabilities of the DXi4000.
• Chapter 7, DXi4000 Status discusses DXi4000 status information.
• Chapter 8, DXi4000 Alerts discusses DXi4000 alert information and
service tickets.
• Chapter 9, DXi4000 Configuration discusses configuration of the
DXi4000.
• Chapter 10, DXi4000 Utilities discusses DXi4000 utilities such as
diagnostic tools and rebooting the system.
• Appendix A, DXi4000 System Specifications provides system
specifications for the DXi4000.
• Appendix B, Troubleshooting discusses problems you may
encounter during the setup and operation of the DXi4000.
• Glossary provides definitions of terms used in this guide.
Notational Conventions This manual uses the following conventions:
Note: Note emphasizes important information related to the main
topic.
Caution: Caution indicates potential hazards to equipment or data.
WARNING: Warning indicates potential hazards to personal safety.
• Right side of the system - Refers to the right side as you face the
component being described.
xviii Quantum DXi4000 User’s Guide
Preface
• Left side of the system - Refers to the left side as you face the
component being described.
• Data sizes are reported in base 1000 rather than base 1024. For
example:
• 1 MB = 1,000,000 bytes
• 1 GB = 1,000,000,000 bytes
• 1 TB = 1,000,000,000,000 bytes
Product Safety
Statements
Quantum will not be held liable for damage arising from unauthorized
use of the product. The user assumes all risk in this aspect.
This unit is engineered and manufactured to meet all safety and
regulatory requirements. Be aware that improper use may result in
bodily injury, damage to the equipment, or interference with other
equipment.
WARNING: Before operating this product, read all instructions and
warnings in this document and in the system, safety, and
regulatory guide.
Quantum DXi4000 User’s Guide xix
Preface
Related Documents The following Quantum documents are also available for the DXi4000:
xx Quantum DXi4000 User’s Guide
Preface
Document
No.
6-00618
6-67093
6-67079
6-67080
6-67081
Document Title
System Safety and
Regulatory Information
- Quantum Products
DXi4000 Site Planning
Guide
Symantec Veritas
NetBackup OST
Configuration Guide
Symantec Backup Exec
OST Configuration
Guide
DXi-Series Command
Line Interface (CLI)
Guide
Document
Description
Lists all safety and
regulatory
information for all
Quantum products.
Provides site
planning information
for the DXi4000.
Provides information
for setting up the
DXi4000 for OST
operation with
NetBackup
Provides information
for setting up the
DXi4000 for OST
operation with
Backup Exec
Provides information
on the DXi4000
command line
interface.
For the most up to date information on the DXi4000, see:
http://www.quantum.com/ServiceandSupport/Index.aspx
Contacts Quantum company contacts are listed below.
Quantum Corporate Headquarters
To order documentation on the DXi4000 or other products contact:
Quantum Corporation
1650 Technology Drive, Suite 700
San Jose, CA 95110-1382
Quantum DXi4000 User’s Guide xxi
(Corporate Headquarters)
Preface
Technical Publications
To comment on existing documentation send e-mail to:
doc-comments@quantum.com
Quantum Home Page
Visit the Quantum home page at:
http://www.quantum.com
Getting More
Information or Help
StorageCare™, Quantum’s comprehensive service approach, leverages
advanced data access and diagnostics technologies with crossenvironment, multi-vendor expertise to resolve backup issues faster and
at lower cost.
Accelerate service issue resolution with these exclusive Quantum
StorageCare services:
• Service and Support Web site - Register products, license
software, browse Quantum Learning courses, check backup
software and operating system support, and locate manuals, FAQs,
software downloads, product updates and more in one convenient
location. Benefit today at:
http://www.quantum.com/ServiceandSupport/Index.aspx
• eSupport - Submit online service requests, update contact
information, add attachments, and receive status updates via email. Online Service accounts are free from Quantum. That account
can also be used to access Quantum’s Knowledge Base, a
comprehensive repository of product support information. Sign up
today at:
http://www.quantum.com/osr
• StorageCare Guardian - Securely links Quantum hardware and the
diagnostic data from the surrounding storage ecosystem to
Quantum's Global Services Team for faster, more precise root cause
diagnosis. StorageCare Guardian is simple to set up through the
internet and provides secure, two-way communications with
Quantum’s Secure Service Center. More StorageCare Guardian
information can be found at:
xxii Quantum DXi4000 User’s Guide
Preface
http://www.quantum.com/ServiceandSupport/Services/
GuardianInformation/Index.aspx
For further assistance, or if training is desired, contact the Quantum
Customer Support Center:
United States 800-284-5101 (toll free)
949-725-2100
EMEA 00800-4-782-6886 (toll free)
+49 6131 3241 1164
APAC +800 7826 8887 (toll free)
+603 7953 3010
For worldwide support:
http://www.quantum.com/ServiceandSupport/Index.aspx
Worldwide End-User
Product Warranty
For more information on the Quantum Worldwide End-User Standard
Limited Product Warranty:
http://www.quantum.com/pdf/QuantumWarranty.pdf
Quantum DXi4000 User’s Guide xxiii
Preface
xxiv Quantum DXi4000 User’s Guide
Chapter 1
DXi4000 System Description
This chapter describes the DXi4000 system and its components and
includes the following sections:
• Overview
• Features and Benefits
• What’s New in DXi 2.0.x Software
• Data Reduction
• Space Reclamation
• Remote Replication
• DXi4000 System
• Hard Drive Storage
• Supported RAID Configurations
• DXi Advanced Reporting
• Network Segmentation
Quantum DXi4000 User’s Guide 1
Chapter 1: DXi4000 System Description
Overview
Overview
The DXi4000 is Quantum’s entry level disk backup solution that
integrates data deduplication and replication technology to connect
backup and DR (disaster recovery) protection across distributed
corporate environments. The DXi4000 disk-based backup appliance uses
Quantum’s patented data deduplication technology to increase disk
capacities by 10 to 50 times, and make WAN replication a practical,
cost-effective part of disaster recovery planning. With up to 12 TB
capacity (up to 11.61 TB usable for data storage), the DXi4000 is
designed for departmental and medium business customers.
Advanced Data Deduplication Increasing Disk Retention for Backup Data
The DXi4000 leverages Quantum’s patented data deduplication
technology (U.S. Pat. No. 5,990,810) to dramatically increase the role
that disk can play in the protection of critical data. With the DXi4000
solution, users can retain 10 to 50 times more backup data on fast
recovery disk than with conventional arrays.
Remote Replication of Backup Data Providing Automated Disaster Recovery Protection
With the DXi4000, users can transmit backup data from a remote site to
a central, secure location to reduce or eliminate media handling.
DXi™-Series replication is asynchronous, automated, and operates as a
background process.
Enterprise Features Provide Secure Repository
The DXi4000 features up to 12 TB capacity (up to 11.61 TB usable for
data storage). The DXi4000 presents storage as NAS shares (CIFS and
NFS) or OST storage servers.
2 Quantum DXi4000 User’s Guide
Features and Benefits
The DXi4000 system provides the following features and benefits:
• New, inline data flow provides leading deduplication with an
optimal combination of total system performance, manageability,
and value.
• NAS or OST (OpenStorage) presentation layer.
• 10 source to one target LAN/WAN replication compatible with
DXi2500-D, DXi4000, DXi6500, DXi6700, DXi7500, and DXi8500
models.
• OST Optimized Duplication support with Symantec Backup Exec and
Symantec NetBackup.
• Supported by every major backup software vendor.
• Rack space requirements: 2U.
• Installs in a standard rack with a minimum depth of 24.09 in (61
cm).
Chapter 1: DXi4000 System Description
Features and Benefits
Note: Quantum recommends installing the DXi4000 system in a
controlled or restricted area to prevent access by untrained
personnel. In addition, Quantum recommends that system
installation be performed only by qualified IT personnel
with strong networking experience.
Quantum DXi4000 User’s Guide 3
Chapter 1: DXi4000 System Description
What’s New in DXi 2.0.x Software
What’s New in DXi 2.0.x Software
DXi 2.0.x Software for DXi4000 is a major update and includes the
following significant enhancements:
• Inline Data Flow - The new, inline data flow enabled by the DXi
2.0.x Software deduplicates data as it is ingested into the DXi
appliance. Optimized for the new generation of purpose-built DXi
hardware platforms, it provides enhanced performance and more
efficient dynamic use of system resources (see
page 5).
• OpenStorage (OST) Improvements - Enhancements include
increased total performance, including writes, reads, and
replication; simplified deployment (see
and dynamically sized LSUs with no hard size limit (see LSU on
page 166).
• Automatic Replication Trigger - In the Directory/File Based
Replication, a file is automatically replicated after it is closed (CIFS
shares) or after several minutes of inactivity (NFS shares) (see
Directory/File Based Replication on page 83). There is no need for
scripting to execute this function. This action makes files at the
target available for access without a local recovery operation.
Data Reduction on
Manage Users on page 171);
• Enhanced Usability - The user interface of the remote management
console has been updated and improved to make it easier to see
important information at a glance and perform the most common
tasks (see
Note: For a list of all menus and pages in the remote
• Custom Network Configuration - You can now create a custom
network configuration using the remote management console as
well as through the CLI (command line interface). The custom
network option allows you to configure the DXi4000 with individual
IP subnet information for each physical interface (see
page 176).
4 Quantum DXi4000 User’s Guide
DXi4000 Remote Management on page 29).
management console, see
page 36. Use this list to help find the new location of
features in the remote manage console.
DXi4000 Management Pages on
Network on
Data Reduction
Chapter 1: DXi4000 System Description
Data Reduction
• Configuration Wizards - New wizards provide guided assistance to
help users configure key features of the DXi4000, such as storage
presentation and data replication. Each wizard leads you step-bystep through the configuration process (see
Wizards on page 43).
Data reduction is the process of reducing the amount of storage
capacity required to store your data. The DXi4000 systems provide two
techniques to optimize the storage space required on your system:
• Data Deduplication
• Compression
DXi4000 Configuration
Data Deduplication The DXi-Series disk backup and replication systems use Quantum’s
patented data deduplication technology to dramatically increase the
role that disk can play in data protection. With DXi-Series solutions,
users can retain 10 to 50 times more backup data on fast recovery disk
than with conventional arrays. This advantage allows IT departments to
cost-effectively retain months of backup data on disk for faster, more
reliable restores and more data recovery points. Quantum’s innovative
implementation of this core technology means that users do not have to
compromise on performance to take advantage of extended retention
capability. The new, inline data flow in the DXi 2.0.x Software provides
streamlined deduplication that offers a maximum combination of total
system performance, manageability, and value.
Quantum's deduplication technology uses a sub-file, variable-length
approach to identify redundant blocks in a data stream—blocks that
have appeared before in the same dataset or in datasets processed at an
earlier time. When a block appears that has already been stored, the DXi
system inserts a reference pointer to the earlier instance of the data
segment instead of storing another copy. The result is a dramatic
reduction in the storage capacity needed to store the data set, and a
similar reduction in the bandwidth needed to replicate deduplicated
data sets over a network. For more information on enabling data
deduplication, see
Quantum DXi4000 User’s Guide 5
NAS Summary on page 138.
Chapter 1: DXi4000 System Description
Space Reclamation
Compression The DXi4000 systems use compression technology after duplicate blocks
have been identified and replaced as part of the deduplication process.
With compression, unique data that has been through the data
deduplication process can be compressed at a typical ratio of
approximately 2:1. This enables you to maximize the storage capacity of
your system.
Space Reclamation
The space reclamation process performs multiple functions on the
DXi4000.
When data is deduplicated it is stored in a block pool—a pool of all
unique data blocks that were captured during the data deduplication
cycle. When subsequent backup jobs occur, the data deduplication
engine searches for new data entering the DXi and uses a variable
length compression algorithm to compare new data to existing data in
the block pool. Unique blocks are added to the block pool and known
blocks are indexed.
The space reclamation function searches the blockpool for data blocks
that are not referenced by any pointers (that is, the files associated with
the block have been expired and removed). Once such a data block is
identified, the block is removed to make the space reusable.
It may be beneficial to schedule space reclamation for a time when
other operations are not normally being carried out. By default the
process will commence every Sunday at 1:00pm. However, to maximize
performance and capacity utilization, it is highly recommended that this
process is performed on a daily basis. As best practice it is
recommended that this process commences at least two hours after
your backup job has completed on a daily basis. It is far more efficient
to process a day’s worth of new data than a week’s worth.
6 Quantum DXi4000 User’s Guide
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