HP D2D100 Backup System - Manual (Page 55)

7 Backup scenarios using the HP
D2D Backup System
The HP D2D Backup System combines all the traditional benefits of tape technology, such as support for
complex media rotation schemes, with the rapid backup and restore time that is only possible from disk.
Backup applications allow users to configure rotation schemes that use tapes for specific days, weeks
and months of a year, often applying different retention policies to each backup job. Such rotation
schemes require an autoloader as the backup device.
Using a tape autoloader configured on your HP D2D Backup System enables you to use the same tape
rotation schemes that you would use with physical tape. To your backup application the tape autoloader
configured on the HP D2D Backup System is a physical tape autoloader device and you can configure
backup jobs from your backup application in exactly the same way as you would for tape. But you benefit
from much faster performance because you are writing to or reading from disk.
Read this chapter for example backup scenarios. It will also give you a clearer understanding of how you
can calculate the number of slots required and ensure that disk space is used effectively.
• “ Example 1: Simple backup ” on page 55
• “ Example 2: Office backup ” on page 56
• “ Example 3: High-performance workstation ” on page 60
• “ Incorporating archive to tape into a rotation strategy ” on page 61
Simple backup
• On Friday: carry out a full backup to one cartridge to capture the week’s work and keep that
cartridge for four weeks before overwriting. Assuming a separate cartridge for each week’s full
backup, four autoloader slots are required.
• For the other weekdays, Monday to Thursday: carry out incremental backups to capture that day’s
changes (one cartridge for each day) and keep each cartridge for a week before overwriting.
Assuming a separate cartridge for each day’s incremental backup, another four autoloader
slots are required.
• On Friday overnight: run a copy job to copy Friday’s full backup to physical tape for offsite
storage.
D2D Backup System 55