HP (Hewlett-Packard) B6960-96035 ユーザーズマニュアル

If you need to back up large amounts of data and the backup window presents
a problem, consider backing up to disk-based devices and using advanced backup
strategies such as synthetic backup and disk staging.

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How can I prepare running applications for backups? Many applications keep
files open, so running a backup would produce an inconsistent backup. This can
be avoided by using pre-exec and post-exec scripts that can be used to synchronize
the status of applications with the backup activities.

Duplicating backed up data

Duplicating backed up data brings several benefits. You can copy data to improve
its security and availability, or for operational reasons.

Data Protector provides the following methods of duplicating backed up data: object
copy, object mirror, and media copy. See

Table 9

on page 112 for an overview of

the main characteristics of these methods.

Table 9 Data Protector data duplication methods

Smart Media
Copy

Media copy

Object mirror

Object copy

An entire
medium

A set of objects
from a backup
session

Any
combination of
object versions
from one or
several backup
sessions

What is
duplicated

Any time after
the completion
of a backup

During backup

Any time after
the completion
of a backup

Time of
duplication

Are different as
disk-based
storage is
combined with
tape-based
storage

Must be the
same

Can be different

Media type of
source and
target media

Must be the
same

Can be different

Size of source
and target
media

Planning your backup strategy

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