Hp D2D100 Backup System Manuel d'utilisateur Page 100
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HP StorageWorks D2D
Backup System
LAN
Switch
Server
PC Server
Backup Data
Copy Data
Tape Drive
SCSI
Card
Figure 39 Ar
chiving to tape
Further information
It is not possible to describe how to carry out this operation because it is controlled solely from the backup
application and different applications operate in different ways. HP provides a number of white papers
that describe show to use this function with specific applications; see h
ttp://www.hp.com/support.Or
refer to the documentation that was supplied with your backup application.
Compression
The HP D2D
Backup System does not apply hardware compression to backed-up data; HP StorageWorks
tape driv
es do apply hardware compression. Therefore, 200 GB of data on the HP D2D Backup System
will require less space on a physical 200 GB tape cartridge. If moving data to a physical cartridge for
offsite storage, there is no need for concern if the data seems to utilize less space.
The capacity quoted for physical media assumes that the tape drive will be able to compress your d ata
and reduce the file sizes by 50%, but this can be achieved only if your data is not already compressed.
For exa
mple,JPEGpictures,movies,musicorZIPfiles, are already in compressed formats: spreadsheets,
text files, high-resolution graphics are not. Most users have a mixture of compressed and uncompressed
data and seldom achieve 50% compression.
Some us
ers may choose to enable software compression from their backup application to increase
the storage space available to the backup application, but this can make backup jobs s lower to run.
Howe ver, once softwar e compression has been applied, the data is not further compressed when it is
exported to a physical tape directly attached to the HP D 2 D Backup System. This ensures that the user
knows
exactly how much physical cartridge space is required for export or copy.
100
Copy using a tape drive attached to the host
- HP StorageWorks 1
- D2D Backup System 1
- User Guide 1
- Contents 3
- About this guid e 11
- HP technical support 12
- Customer self r epair 12
- Product warranties 12
- Registering your tape drive 12
- Subscription service 13
- HP websites 13
- Documenta 13
- About this guide 14
- 1 B efore you s tart 15
- Terminology 16
- Host3Host2 Host4/5/6Host1 17
- Import/Export and Copy 18
- Storage capa 19
- Tape rotation strategies 20
- Before you start 22
- D2D Backu p System 23
- DHCP and static I 24
- Paddressing 24
- Optional Tape Attach 24
- Supplied 26
- Internet Explor 27
- Internet Explorer 6.X 27
- 3Attachingaphysicaltapedrive 29
- (option al) 29
- Installing the HBA 31
- 4TheInstallationwizard 39
- Run the Ins 40
- The Installation wizard 42
- 5 Advanced installation 45
- Microsoft iSCSI Initiator 46
- The iS CSI Initiator 47
- General tab 48
- Discovery tab 48
- Targets tab 49
- Persistent Targets tab 50
- Linux iSCSI initiator 51
- Manual driver installation 51
- HP LTO Tape driv 52
- Medium changer d river 52
- Understanding the LEDs 53
- Beacon mode 53
- Office backup 56
- Database server 57
- Desktop PC 58
- High-per 60
- Graphics 61
- Summar y (Home) 64
- Devices (Configuration) 65
- To edit device details 66
- To create a new device 66
- Cartridges (Configuration) 67
- The Web Management Interface 68
- Empty slots 69
- To remove a cartridge 69
- To write protect 70
- To edit maximum size 70
- To create a cartridge 70
- Network ( Configuration) 71
- Network configuration 72
- Email Alerts (Co 74
- Disk & RAID (Status) 76
- Physical disks 77
- Log (Status) 78
- Tape Attach pages 79
- Administration (Admin) 80
- Firmware (Admin) 81
- Support (Admin) 82
- Archiving methods 84
- WhyusetheCopyfunctionality? 85
- When would Copy be used? 85
- Cartr i dge export 86
- When would Export be used? 87
- Disadvantages of Export 87
- Cartridge import 88
- Tape spanning 88
- Configuration (Tape Attach) 89
- Status (T ape Attach) 94
- Schedule (Tape Attach) 95
- To create a schedule 96
- Job History (Tape Attach) 97
- 10 C o py using a tape drive 99
- Compression 100
- 11 Restore processes 101
- Restoring from 102
- Restore processes 104
- 12 Troubleshooting 105
- Troubleshooting 106
- Manual installation 108
- Device troubleshooting 109
- Cartridge troubleshooting 110
- Email alerts tro 112
- Disk troubleshooting 112
- 13 Hard disk replacement 113
- If m o re than one disk fails 114
- Replacing the hard disk 115
- Hard disk replacement 116
- System Board 118
- Replacing a complete unit 122
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