HP D2D100 User manual

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HP StorageWorks
D2D Backup System
HP D2D4004 and HP D2D4009
User Guide
Part number: EH938-90924
Third edition: September 2008

Legal and notice information
©Copyright 2008 Hewlett-Packard Development Company, L.P.
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.
Linear Tape-Open, LTO, LTO Logo, Ultrium and Ultrium Logo are trademarks of Quantum Corp, HP and IBM in the US, other
countries or both.
Patented under one or more of U.S. Patents Nos. 5,003,307; 5,016,009; 5,463,390; 5,506,580; held by Hi/fn, Inc.
Microsoft, Windows, Windows NT, and Windows XP are U.S. registered trademarks of Microsoft Corporation.
Intel and Itanium are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and other
countries.
AMD is aregistered trademark of Advanced Micro Devices, Inc.

Contents
Aboutthisguide ......................... 11
Intendedaudience..................................... 11
Relateddocumentation................................... 11
Documentconventionsandsymbols ............................. 11
HPtechnicalsupport.................................... 12
Customerselfrepair .................................... 12
Productwarranties..................................... 12
RegisteringyourHPD2DBackupSystem ........................... 12
Subscriptionservice .................................... 13
HPwebsites........................................ 13
Documentationfeedback .................................. 13
1Beforeyoustart......................... 15
Overview......................................... 15
Optionaltapeattach.................................... 16
Softwareandhardwarerequirements............................. 16
Terminology ....................................... 17
Autoloaders...................................... 17
Backupdevicesandslots................................ 17
Emulationtypes.................................... 17
FibreChannel..................................... 17
HostsonanEthernetnetwork .............................. 18
HostsonanFCnetwork ................................ 19
Import/ExportandCopy ................................ 19
iSCSI ........................................ 19
Libraries ....................................... 19
Mailslots(import/exportelements)............................ 20
Physicaltapedrives .................................. 20
RAID......................................... 20
Storagecapacity ..................................... 20
Physicalstorage.................................... 20
Taperotationstrategies................................. 20
Datadeduplication .................................... 21
Technologytypes ................................... 21
DatadeduplicationandtheHPD2D ........................... 21
BenefitsofHPD2Ddeduplication ............................ 21
Deduplicationandcompression ............................. 22
Taperotationexamplewithdatadeduplication....................... 22
Retentionpolicy.................................. 22
Dataparameters.................................. 22
Typicalsavings .................................. 22
2ConnectingandinstallingtheHPD2DBackupSystem ........ 25
Installingtherailkit .................................... 25
Overview....................................... 25
Kitcontents...................................... 25
Importantsafetyinformation............................... 25
Installationguidelines ................................. 25
Mountingtheserver .................................. 26
Connectingthehardware.................................. 29
D2D Backup SystemHP D2D4004 and HP D2D4009 3

Supported Ethernet configurations .............................. 30
Ethernetnetworkconnection............................... 30
IPv4andIPv6networkprotocols........................... 30
Dualnetworkports................................. 30
DHCPandstaticIPaddressing............................ 30
HPD2DonaGigabitEthernetnetwork........................ 30
PoweringontheHPD2D.................................. 32
Software installation, discovery and configuration ....................... 32
InstallationwizardforWindowsusers........................... 32
RunningtheInstallationwizard............................ 33
Recommendedwebbrowsersettings ............................. 35
InternetExplorer7.X .................................. 36
InternetExplorer6.X.................................. 36
MozillaFirefox1.5andFirefox2.X............................ 36
3Attachingaphysicaltapedrive(optional).............. 37
HardwarerequirementsforTapeAttach............................ 37
Tapedriveinstallationoverview ............................... 37
Removingthetopcover................................... 38
InstallingtheHBA ..................................... 38
RemovingthePCICage................................. 39
Removingtheslotcover................................. 40
InstallingthePCIeCard................................. 41
ReinstallingthePCICage................................ 42
Replacingthetopcover................................... 43
Connectinganexternalorrackmounttapedrive ........................ 44
4 Advanced installation ...................... 45
Manualdriverinstallation.................................. 45
HPLTOTapedriver .................................. 45
Mediumchangerdriver................................. 45
UsingDHCPtodiscovertheHPD2DBackupSystem(IPv4only).................. 46
UsingtheDiscoveryEnginetodiscovertheHPD2DBackupSystem(IPv4only) ........... 46
Beaconmode..................................... 47
If the HP D2D Backup System is new and not yet configured ................. 47
If the HP D2D Backup System has been configuredincorrectly ................ 47
Ifthenetworksetuphasbeenchanged .......................... 47
UsingtheconsoletodiscovertheHPD2DBackupSystem(IPv4andIPv6) ............. 47
Toconnectthesystemconsole.............................. 47
iSCSIInitiator....................................... 49
ManualiSCSIinitiatorinstallation ............................ 50
TheiSCSIInitiatorandAuthentication........................... 50
TheMicrosoftiSCSIInitiator............................... 51
Generaltab.................................... 51
Discoverytab................................... 53
Targetstab.................................... 54
PersistentTargetstab................................ 56
BoundVolumes/Devicestab............................. 57
LinuxandUNIXiSCSIinitiators ............................... 57
5HPD2DBackupSystemsandFibreChannel............. 59
FibreChanneltopologies.................................. 59
Zoning.......................................... 59
FibreChannelconnection.................................. 60
Fibre Channel (Configuration)................................ 61
To edit the FC configuration............................... 61
FibreChannel(Status) ................................... 61
Devicessection .................................... 62
4

Librarysection..................................... 62
6LEDs.............................. 63
FrontpanelLEDs...................................... 63
HarddriveLEDs.................................... 63
RearpanelLEDs...................................... 64
FibreChannelcardLEDs .................................. 65
Beaconmode....................................... 66
7TheWebManagementInterface.................. 67
WhatistheWebManagementinterface?........................... 67
ToruntheWebManagementInterface ............................ 67
Summary(Home) ..................................... 68
Statusicons...................................... 69
Devices (Configuration)................................... 69
Emulationtypesfortapedevices............................. 70
Libraries, slots and storage capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Userrecommendations............................... 71
Toviewdevicedetails ................................. 71
Toeditdevicedetails.................................. 71
Tocreateanewdevice................................. 72
Todeleteadevice................................... 73
Cartridges (Configuration) ................................. 74
Emptyslots...................................... 75
Todeleteacartridge.................................. 76
Towriteprotectacartridge ............................... 76
Toeditmaximumsize ................................. 76
Tocreateacartridge.................................. 76
Network (Configuration) .................................. 77
Network configuration ................................. 77
Toeditnetworksettings............................... 77
Resettingnetworksettingstofactorydefaults........................ 78
Beaconmode..................................... 79
Fibre Channel (Configuration)................................ 79
Email Alerts (Configuration)................................. 79
To configureMicrosoftExchangeServer.......................... 80
Disk(Status)........................................ 81
Diskusage...................................... 82
RAID(Status) ....................................... 82
RAIDstatus...................................... 83
Physicaldisks..................................... 83
iSCSI(Status) ....................................... 84
FibreChannel(Status) ................................... 84
Log(Status)........................................ 84
TapeAttachpages..................................... 85
Admin(Settings)...................................... 85
Resettingthepassword................................. 86
Shutdown(Settings) .................................... 86
Firmware(Settings)..................................... 87
Backup(Settings) ..................................... 89
To generate the configuration file............................. 89
To upload the configuration file ............................. 90
Support(Settings) ..................................... 90
License(Settings) ..................................... 90
To apply the license key ................................ 91
8 Export, import and copy using an attached tape drive . . . . . . . . 93
RequirementsforconnectingatapedrivetotheHPD2D..................... 93
D2D Backup SystemHP D2D4004 and HP D2D4009 5

Anoteaboutterminology.................................. 93
Archivingmethods..................................... 94
Cartridgecopy .................................... 94
WhyusetheCopyfunctionality?........................... 95
WhenwouldCopybeused? ............................ 95
Whenisitnecessarytorestorefromacopiedcartridge? ................ 95
DisadvantagesofCopy............................... 96
Cartridgeexport.................................... 96
WhyusetheExportfunctionality? .......................... 97
WhenwouldExportbeused?............................ 97
WhenwouldIrestorefromanexportedcartridge? ................... 97
DisadvantagesofExport .............................. 98
Compression ..................................... 98
Cartridgeimport.................................... 98
Tapespanning .................................... 99
UsingtheWebManagementinterfacetocopy/export/importcartridges ............. 99
Configuration(TapeAttach)............................... 99
Addingtapedrivestothelist ............................ 99
Upgrading tape drive firmware ........................... 100
Copy/Export/Import(TapeAttach)............................ 100
Tocopytoattachedtapedrive............................ 100
Toexporttoattachedtapedrive........................... 101
Toimportfromattachedtapedrive.......................... 102
Status(TapeAttach) .................................. 103
Tocancelajob .................................. 103
Ifanerroroccurs ................................. 104
Schedule(TapeAttach)................................. 104
Tocreateaschedule................................ 104
Toview,editordeleteexistingschedules ....................... 106
JobHistory(TapeAttach)................................ 106
9Copyusingatapedriveattachedtothehost ............ 109
Requirements ....................................... 109
Tapedrivessupported ................................. 109
Archivefromhosttotapeprocess .............................. 109
Furtherinformation................................... 110
Compression ....................................... 110
10Restoreprocesses ....................... 111
Restorescenarios ..................................... 111
RestoringfromtheHPD2DBackupSystem........................... 112
Restoreanddeduplication.................................. 112
ReconnectingtotheHPD2Dafterhostfailure ......................... 112
11 Troubleshooting . . . . .................... 117
Connectingthehardware.................................. 117
ConnectingtotheHPD2Dfromthebackupapplication..................... 117
Connectingtothenetwork ................................. 117
Performance ....................................... 118
Network ....................................... 118
WebManagementInterfaceerrorsandwarnings........................ 118
DiskRAIDerrorsandwarnings ............................. 118
Networkwarnings................................... 119
Systemstate...................................... 119
PowerOn/OffProblems .................................. 119
HPD2Dshutsdownautomatically ............................ 119
HPD2Ddoesnotbootupcorrectly............................ 119
HP D2D System Health LED is flashingRED ........................ 120
6

HPD2Dbootsupcorrectly,butcannotbeseenonthenetwork................ 120
CannotconnecttoWebManagementInterface ........................ 120
HPD2Disnotvisibleonthenetwork........................... 120
CannotlogintotheWebManagementInterface...................... 120
CannotauthenticateaniSCSIsession............................. 120
IftheHPD2DBackupSystemrunsoutofdiskspace ...................... 120
HP D2D configurationproblems ............................... 121
Icannotseeanewlycreateddevice ........................... 121
I cannot see additional slots from the backup application . . . . . . . . . . . . . . . . . . 121
Upgradelicenses ..................................... 121
CanItransfertheLicenseToUsetoadifferentHPD2D?................... 121
Morediskspresentthanarelicensed........................... 121
Replacementofhardware.................................. 121
Eventlogdisplays‘InvalidBIOSAssemblyname’...................... 121
RAIDbatterybackupstatus ............................... 121
IftheRAIDbatteryfails................................. 121
12Harddiskreplacement ..................... 123
RAID6.......................................... 123
HowdoIknowadiskhasfailed? .............................. 123
Ifyouhaveasystemconsole .............................. 125
Ifyouhaveemailalerts................................. 126
TheEventLog..................................... 126
Replacingtheharddisk................................... 127
EmailalertsandLog.................................. 129
Ifyouhaveasystemconsole .............................. 129
Ifseveraldisksfail..................................... 130
Replacingthedisks .................................. 131
InitializingRAID.................................... 132
Createcartridges ................................. 132
13 Capacity Upgrade . . ..................... 133
Anoverviewofthecapacityupgradeprocess ......................... 133
Installingtheupgradekit .................................. 133
Summary and RAID pages after adding disks . . . . . . . . . . . . . . . . . . . . . . . 135
About the Capacity Licence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
ApplyingtheLTU ..................................... 136
CompletingtheRAIDexpansion............................... 137
Index .............................. 141
D2D Backup SystemHP D2D4004 and HP D2D4009 7

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23
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25
26
27
28
29
30
31
32
33
Figures
FrontviewoftheHPD2DBackupSystem...................... 15
Rear view of the HPD2DBackupSystem...................... 16
Device configurationwithonehost ........................ 18
Device configurationwithmultiplehosts ...................... 19
Datastoredafterdeduplication.......................... 21
Space saving withdeduplication ......................... 23
Attachtherailstotherackcolumns ........................ 27
Insert the HPD2Dserverintotherack ....................... 28
CTObracketlocation .............................. 28
SecuretheHPD2Dtotherack .......................... 29
Networkandpowerconnectors.......................... 29
Connectingtoabusinessserveronthemainnetwork ................ 31
Connectingtoadedicatedbackupnetwork..................... 32
PoweringontheHPD2DBackupSystem...................... 32
Removingthetopcover ............................. 38
RemovingthePCIcage ............................. 39
Removingtheslotcover(fullheight) ........................ 40
Removing the slot cover (low profile)........................ 41
InstallingthePCIecard(fullheight) ........................ 41
InstallingthePCIecard(inthelowprofileslot) ................... 42
ReinstallingthePCIcage............................. 42
SecuringthePCIcage.............................. 43
Replacingthetopcover ............................. 43
SystemconsoleconnectionsontheHPD2D..................... 48
Systemconsolescreen.............................. 49
iSCSIInitiatordownloadpage .......................... 50
Generaltab(iSCSI)............................... 52
CHAPsecret.................................. 53
Discoverytab(iSCSI) .............................. 53
Addtargetportal................................ 54
Targetstab(iSCSI) ............................... 55
AdvancedsettingsCHAP ............................ 56
PersistentTargetstab(iSCSI) ........................... 57
8

34 Front view of the HPD2DBackupSystem...................... 63
35 DriveLEDs................................... 64
36 RearpanelLEDs ................................ 65
37 Cartridgecopy................................. 95
38 Cartridgeexport ................................ 97
39 Cartridgeimport ................................ 98
40 Archiving to tape................................ 110
41 DriveLEDs................................... 123
42 Summary pagewithRAIDstatuswarning...................... 124
43 Identifyingthefaileddisk(s) ........................... 125
44 System consoleshowingfaileddisks........................ 126
45 Logshowingdiskfailure............................. 127
46 Disknumbering ................................ 127
47 Removingtheharddrive............................. 128
48 Installingareplacementharddisk......................... 128
49 RAIDrebuilding ................................ 129
50 SystemconsoleduringRAIDrebuild........................ 130
51 Statusshowingmultiplediskfailure ........................ 131
52 RAIDshowingthreediskfailures ......................... 131
53 DevicespageawaitingRAIDinitialization ..................... 131
54 Systemconsoleafterthreedisksarereplaced.................... 132
55 Disknumbering ................................ 134
56 Removingtheharddriveblank .......................... 134
57 Installingaharddisk .............................. 135
58 Summarypageafteraddingdisks......................... 135
59 RAIDpageafteraddingdisks .......................... 136
60 Summarypageafterexpansionpromptingforreboot ................ 138
61 RAIDafterexpansionandreboot......................... 139
D2D Backup SystemHP D2D4004 and HP D2D4009 9

Tables
1Documentconventions.............................. 11
2Datadeduplicationsavings,example1 ...................... 23
3FCcardLEDs ................................. 65
4Summarypagelayout.............................. 68
5Deviceparameters(tophalfofthepage)...................... 70
6Device parameters ............................... 72
7Cartridge parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
8Network parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
9Networkportparameters ............................ 78
10 Emailparameters................................ 80
11 Physicaldiskparameters............................. 83
12 Jobscheduleparameters............................. 106
13 Restorescenarios................................ 111
10

About this guide
This guide provides information about:
• Installing the HP StorageWorks D2D Backup System
• Using the HP StorageWorks D2D Backup System
• Troubleshooting the HP StorageWorks D2D Backup System
Intended audience
This guide is intended for users who install, operate and maintain the HP StorageWorks D2D Backup
System.
Related documentation
In addition to this guide, the following document provides related information:
• ‘Starthere’posterforanoverviewoftheinstallationinformationinthisguide(availablein
English, French, German and Japanese)
You can find these documents from the Manuals page of the HP Business Support Center website:
http://www.hp.com/support/manuals
In the Storage section, click Storage Solutions and then select your product.
http://www.hp.com/support/manuals
Document conventions and symbols
Table 1Document conventions
Convention Element
Blue text: Table 1Cross-reference links and e-mail addresses
Blue, underlined text: http://www.hp.com website addresses
Bold text
•Keys that are pressed
•Text typed into aGUI element, such as abox
•GUI elements that are clicked or selected, such as
menu and list items, buttons, tabs, and check boxes
Italic text Text emphasis
Monospace text
•File and directory names
•System output
•Code
•Commands, their arguments, and argument values
Monospace, italic text •Code variables
•Command variables
Monospace, bold text Emphasized monospace text
D2D Backup SystemHP D2D4004 and HP D2D4009 11

WARNING!
Indicates that failure to follow directions could result in bodily harm or death.
CAUTION:
Indicates that failure to follow directions could result in damage to equipment or data.
IMPORTANT:
Provides clarifying information or specificinstructions.
NOTE:
Provides additional information.
HP technical support
For worldwide technical support information, see the HP support website:
http://www.hp.com/support
Before contacting HP, collect the following information:
•Product model names and numbers
•Technical support registration number (if applicable)
•Product serial numbers
•Error messages
•Operating system type and revision level
•Detailed questions
Customer self repair
HP customer self repair (CSR) programs allow you to repair your StorageWorks product. If aCSR
part needs replacing, HP ships the part directly to you so that you can install it at your convenience.
Some parts do not qualify for CSR. Your HP-authorized service provider will determine whether arepair
can be accomplished by CSR.
For more information about CSR, contact your local service provider. For North America, see the CSR
website:
http://www.hp.com/go/selfrepair
Product warranties
For information about HP StorageWorks product warranties, see the warranty information website:
http://www.hp.com/go/storagewarranty
Registering your HP D2D Backup System
Once you have installed and tested your HP D2D Backup System please take afew minutes to register
your product. You can register via the web (http://www.register.hp.com).
12 About this guide

To ensure your registration is complete, there are anumber of questions on the electronic form that are
mandatory. Other questions are optional. However, the more you feel able to complete, the better HP
can meet your needs.
Subscription service
HP recommends that you register your product at the Subscriber’s Choice for Business website:
http://www.hp.com/go/e-updates
After registering, you will receive e-mail notification of product enhancements, new driver versions,
firmware updates, and other product resources.
HP websites
For additional information, see the following HP websites:
• http://www.hp.com
• http://www.hp.com/go/ebs
• http://www.hp.com/go/connect
• http://www.hp.com/go/storage
• http://www.hp.com/service_locator
• http://www.hp.com/support/manuals
• http://www.hp.com/support/downloads
Documentation feedback
HP welcomesyour feedback.
To make comments and suggestions about product documentation, please send amessage to
[e-mail] submissions become the property of HP.
D2D Backup SystemHP D2D4004 and HP D2D4009 13

14 About this guide

1Before you start
In this chapter:
•“Overview”on page 15
•“Optional tape attach”onpage16
•“Software and hardware requirements”on page 16
•“Terminology”on page 17
•“Storage capacity”on page 20
•“Data deduplication”on page 21
Overview
The HP StorageWorks D2D Backup System is an iSCSI or Fibre Channel disk-based storage appliance
that emulates up to 16 tape devices, which can be used to back up host network servers or PCs. Each
tape device is configured as an Ultrium Tape Library or Autoloader. An emulation type is selected during
initial configuration and this determines the maximum number of drives and the maximum number of
slots that may be configuredforthedevice. Thedefaultconfiguration emulates the HP StorageWorks
MSL2024 Tape Library, which provides aloader with one drive and 24 slots.
1. PowerOnbutton/LED 5. LAN Port 1LED
2. Hot plug drives 6. LAN Port 2LED
3. HP D2D Beacon LED 7. D i s k O n l i n e L E D
4. System Health LED 8. Disk Beacon LED
Figure 1Front view of the HP D2D Backup System
D2D Backup SystemHP D2D4004 and HP D2D4009 15

1. Power supply cable sockets (two) 5. PCIe slots (two full and one low profile)
2. LAN port 1 6. VGA port for system console monitor
3. LAN port 2 7. PS/2 ports for system console keyboard and mouse
4. Management LAN port (Do not connect to this port)
Figure 2Rear view of the HP D2D Backup System
NOTE:
OnefullPCIeslothasaP400controllercardpre-installed.TheotherslotisavailableforoptionalTape
Attach. If you have the Fibre Channel product, aFC card will be pre-installed in the other full PCIe slot.
You must install the Tape Attach card in the low profile slot.
Optional tape attach
An external or rackmount Ultrium Tape Drive may be attached directly to the HP D2D Backup System,
allowing the user to store backups offsite. Both SAS and SCSI tape drives are supported and require
installation of ahost bus adapter (HBA). External tape drives may be half-height or full-height. Rackmount
tape drives are installed in arackmount enclosure, such as a1U Rack, 3U Rack or aTapeArray.
To find out which Ultrium Tape Drive models and HBAs are supported, refer to
http://www.hp.com/go/connect or http://www.hp.com/go/ebs.
Software and hardware requirements
Refer to http://www.hp.com/go/connect or http://www.hp.com/go/ebs for the latest connectivity
and compatibility information.
• When connecting to aFibre Channel network, the HP D2D Backup System is supplied with the
correct FC card pre-installed. Cables are not supplied;
• When connecting to an Ethernet network, the HP D2D Backup System should be connected to a
Gigabit Ethernet network. 100 Base-T Ethernet will limit performance; 10 Base-T Ethernet will
severely limit performance.
• For backup and restore you need software that supports tape autoloaders and libraries. This
software resides on the host, not the HP D2D Backup System. The device may be used with the
major backup applications from HP, Symantec, EMC, Computer Associates and others.
16 Before you start

Terminology
Autoloaders
An autoloader is abackup device that has asingle tape drive and multiple storage slots. (A library has
multiple tape drives, see “Libraries”on page 19.) Each storage slot contains acartridge that can be
allocated to aspecificbackup task; for example, one cartridge can hold Monday’s data, another can
hold Tuesday’s data, and so on. In this way, backup applications are able to implement tape rotation
strategies that accommodate differing backup requirements for daily, weekly, monthly, yearly backups.
Backup devicesandslots
Backup devicesappear to the host as locally-attached tape devices, but physically, they use disk space on
the HP D2D Backup System which, as in tape terminology, is referred to as slots or cartridges.
Anumber of emulation types are available; you select the appropriate one for your data protection
strategy during initial configuration and when you subsequently create adevice. The default configuration
is an HP StorageWorks MSL2024 Tape Library with one attached Ultrium LTO-3 Tape Drive and 24
slots. (Other emulation types, such as MSL4048, allow for agreater number of drives and slots, see
“Devices (Configuration)”on page 69.)
When you configure your HP D2D Backup System with atape library, the drive emulation type that you
select determines the amount of physical disk space that is made available for each configured slot.
LTO-2 defaults to 200 GB, LTO-3 defaults to 400 GB and LTO-4 defaults to 800 GB. This is the equivalent
of atape library with multiple slots, each containing a200, 400 or 800 GB cartridge. Both tape
spanning and, more importantly, flexible tape rotation strategies are possible.
Emulation types
HP D2D products emulate arange of physical Tape Autoloaders or Tape Libraries. Supported emulation
types are listed below:
•HP 1x8 G2 Autoloader
•HP MSL2024 Library
•HP MSL4048 Library
•HP D2DBS Library
If it is supported by your backup application, HP D2DBS Library is the preferred emulation type to be
used because it does not emulate any physical library types in existence and is clearly identifiable as a
D2D device. It is the most flexible emulation type available; however, backup application support varies
by software vendor. See also “Emulation types for tape devices”on page 70.
Fibre Channel
Fibre Channel supports network connectivity over fibre optic cabling or copper wiring. It has adifferent
set of standards and network connection protocol to Ethernet and different configuration requirements.
The FC version of the HP D2D Backup System may be connected to both aFibre Channel SAN and an
Ethernet (as an iSCSI device) network. The FC connection is used only to transfer backup data from the
host tothe HP D2D. Access to the HP D2D Web Management interface is always across an Ethernet
connection. See also “HP D2D Backup Systems and Fibre Channel”onpage59.
NOTE:
It is not possible to upgrade an iSCSI HP D2D to FC; the iSCSI product can only be configured with iSCSI
devices.
D2D Backup SystemHP D2D4004 and HP D2D4009 17

HostsonanEthe
rnet network
Each emulated backup device is uniquely mapped to an individual host; this is the network server or
PC that you wish to back up.
• The backup device appears to the host as alocally-attached tape autoloader or library.
• The backup device is accessed and managed from the backup software running on the host.
• The backup device is not visible to other devices on the network.
• Multiple servers may not back up to asingle backup device.
Figure 3on page 18 shows aconfiguration with asingle host. The Installation wizard has been run
on Host 1. The HP D2D Backup System automatically generates alibrary for the host. The user may
specify the number of slots during installation. Figure 4on page 19 shows aconfiguration with three
hosts. The HPD2D Backup System can be used to back up amaximum of sixteen hosts. The Installation
wizard automatically generates alibrary for each host. The user may specify the number of slots during
installation.
LAN
Host3Host2 Host4 onwardsHost1
HP StorageWorks D2D Backup System
Library 1
Figure 3Deviceconfiguration with one host
• Bydefault,onlyonedeviceisvisibletothehost,thelibrarythathasbeenconfigured for it during
installation. Data from each host goes to its corresponding library.
• Each backup device is visible only to the host for which it has been configured.
• Ahost
may have multiple devices configured for it on the HP D2D Backup System, but this means
fewerhosts may be connected (not illustrated).
18 Before you start

HP StorageWorks D2D Backup System
LAN
Host4 onwardsHost1 Host2 Host3
Library 1 Library 2 Library 3
Figure 4Device configuration with multiple hosts
Hosts on anFCnetwork
The host is the network server or PC that you wish to back up.
Library devices on the HP D2D cannot be created for aspecifichost during installation. When you create
alibrary using the Web Management interface you assign it to aFC port (port 1or port 2) and the
library will then be visible on the FC SAN. When you log in, you log in to the switch to which the host
is connected, which means that the library is visible to all other devices on the SAN. You can zone
your network so that only specificdevices have access to it, but generally it is visible to all. See also
“HP D2D BackupSystemsandFibreChannel”on page 59.
Import/Export and Copy
If you attach asupported, physical tape drive directly to your HP D2D Backup System, you will be
able to copy or export data to the physical tape drive so that backups can be stored offsite. This is an
important requirement for Disaster Recovery strategies. The main difference between copy and export
is that copied data remains on the HP D2D Backup System; exported data is removed from it, but can
be imported easily when required. These functions are grouped under the Tape Attach section of the
Web Interface. Please see “Export, import and copy to an attached tape drive”on page 93 for more
details about working with Tape Attach.
iSCSI
On an Ethernet network the HP D2D Backup System is configured as an iSCSI device. This
means that the HP D2D Backup System plugs directly into the network, but it presents devices as
directly-attached SCSI autoloaders to host machines. In order to function, it requires an iSCSI initiator.
On Windows systems, this is normally downloaded by the Installation wizard, as described in
“Connecting and installing the HP D2D Backup System”on page 25. For more information about
iSCSI, see “Advanced installation”on page 45. Linux and UNIX users should also refer to the “UNIX
Configuration Guide” on the HP StorageWorks Tape CD-ROM for more information.
Libraries
Atape library is also abackup device that has multiple drives and multiple storage slots. Each storage
slot contains acartridge. The difference between an autoloader and alibrary is that alibrary can
D2D Backup SystemHP D2D4004 and HP D2D4009 19

support multiple tape drives whereas an autoloader only has one tape drive. This provides considerable
storage capacity and full support for tape rotation strategies. (It may be necessary to upgrade your
backup application to support libraries.)
Mail slots (import/export elements)
Amailslotisa
term borrowed from tape terminology to identify adedicated slot that is used specifically to
import and export cartridges. They are sometimes called import/export elements by backup applications.
Backup applications that support this feature move cartridges from the mail slot when the user runs an
Export job, and look for cartridges in the mail slot when the user runs an Import job.
Physical tape drives
Aphysical tape drive is atape drive that is attached to the HP D2D Backup System or the host computer,
so that data can be moved from the HP D2D Backup System and stored offsite. (It should not be confused
with the tape drive device that is attached to the library device on the HP D2D Backup System (see
“Devices (Configuration)”on page 69.)
RAID
RAID stands for Redundant Array of Inexpensive (or Independent) Devices, which is adata storage
scheme that divides data among multiple hard drives, increasing data reliability and throughput. The
HP D2D Backup System is aRAID 6device, which offers the best combination of data protection and
capacity for disk arrays. It provides protection against double disk failures and failures while asingle
disk is rebuilding. The failed disk should be replaced as soon as possible.
Storage capacity
Physical storage
The physical storage capacity of the HP D2D Backup System is 4.5 TB (6 x750 GB) or 9.0 TB (12 x
750 GB). However, in order to ensure ahigh level of data integrity, the disks use RAID 6protection.
This reduces the available capacity but ensures that, in the event of adisk failure in the device, there
will be no data loss.
Actual storage capacity is approximately:
•3TB for the 6–disk HP D2D Backup System
•7.5 TB for the 12–disk HP D2D Backup System
Data deduplication is enabled by default for each library device. This eliminates duplicate data from
backups and means that more histories of data can be stored and retained for longer on each library.
See also “Data deduplication”on page 21.
If you have the 6–disk model, it is possible to extend disk space by purchasing and installing the 6–disk
extension pack. This more than doubles the storage capacity. Other options for creating space are:
•Reviewyour backup jobs to see if you can reduce the size of backup or retention time.
•Use the backup application job settings to overwrite or erase data.
•Export cartridges to physical tape.
Tape rotation strategies
Tape rotation strategies determine when backups are run, the number of cartridges that are required and
how they are reused. The HP D2D Backup System is avery flexible device that can easily be incorporated
into most tape rotation strategies. If your organization does not yet have atape rotation strategy in place,
see “Tape rotation example with deduplication”on page 22 for example configurations.
20 Before you start