HP StorageWorks 6105 Virtual Library System AF728A 产品宣传页

Positioning the HP Virtual Library Systems in the hierarchy 
of data protection solutions 

 

Figure 3. HP disk-assisted backup technologies: Each technology gives a different level of service at a different cost to 
implement 

Data Protection Technologies

D2D

Small SAN & 

LAN

Tape 

(tape drives, tape automation)

Virtual Tape

SAN & LAN

•

Basic Backup and Recovery 
Functions

•

Offsite vaulting

•

Best protection against malicious 
intent (hackers & viruses)

•

Enhanced performance 

•

Enhanced reliability

•

Seamless integration (Virtual tape)

•

“Instant” volume recovery

•

Leverages High Availability 
investment

Snap and Clone Technology

(Business Copy)

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DPM

LAN only

Windows 

only

DPM= Data Protection Manger by Microsoft

 

 
Physical tape will always be the foundation of a robust data protection strategy offering low cost/GB 
storage and off-site vaulting capabilities. However, in many cases an increase in backup performance 
can be achieved by using disk-assisted backup techniques

Disk has the advantage of being random access and does not suffer the same performance 
(repositioning) issues when backing up lots of small files. Additionally backup to disk does not 
generally suffer from some of the error conditions that can cause backup jobs to tape to fail, for 
example, no media in the media pool, media coming to the end of its useful life, tape jams, and 
robotic failures. 

                                                 

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 The exception to this statement is when the disk arrays being backed up are very fast or the number of “streams” that are available to interleave 

to a single tape is high. In these circumstances, when using very high-performance tape drives such as the HP StorageWorks Ultrium 960 (LTO3), 
the backup to tape can be faster than the equivalent backup to disk. 

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