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Configuring and Using Backup Devices
Configuring Devices for Direct Backup
Chapter 2 39
Backup Device
Auto-detection
The XCopy engine must reside on the FC bridge to which the backup
device or drive is connected (external FC bridge), or on the internal FC
bridge. A backup device that is used with direct backup functionality is
auto-detected whenever a direct backup session is started. If
auto-detection is not used, the WWN and the LUN parameters must be
entered manually; the LUN must be reconfigured every time the LUN
changes.
XCopy Engine There can be more than one physical XCopy engine in a direct backup
environment. Each of these physical XCopy engines can have more
logical XCopy engines configured and assigned. Which of these logical
XCopy engines will be used in a direct backup session is specified in the
direct backup specification by specifying the backup device(s) to be used
and assigning them a logical XCopy engine. The physical XCopy engine
behind the logical XCopy engine specified in the backup specification
must be configured for the backup system specified in the backup
specification.
The following types of backup devices are supported for a Data Protector
direct backup:
•standalone devices
• SCSI-II libraries
Configuration Procedure
Refer to the following online Help index keywords and perform any
necessary steps before configuring backup devices as described later in
this section:
• online Help index keyword “preparing backup devices”
• online Help index keyword “configuring direct backup environment”
Configuring a backup device for direct backup consists of the following:
1. Configuring a standalone device or SCSI-II library.
2. Configuring XCopy engines.
3. If direct library access will be used, configuring the libtab file.