Seagate ST39175LW Instrukcja Naprawy Pobierz pdf (Strona 38)

Offhost Backup Overview

24 NetBackup ServerFree Agent System Administrator’s Guide

Third-Party Copy Device

In this offhost backup method, a third-party copy device performs the I/O processing of

the backup (data movement).

Choose this option if processing time on the NetBackup client is critical and off-loading

backup processing to a third-party copy device may save time.

Figure “Third-Party Copy” shows the basic components used in the Third-Party Copy

Device method. A third-party copy device (not a component of NetBackup) handles the

backup data movement.

Third-Party Copy

Disks of client

data on SAN

NetBackup

master server

Fibre Channel/SAN

LAN / WAN

Robot on

SAN

NetBackup

media server

NetBackup

client

1. On LAN, client backup is initiated by master server, which tells the client to map the

frozen image data.

2. On LAN, client sends the mapping information to the media server.

3. Media server sends third-party copy commands to the third-party copy device over the SAN.

4. Third-party copy device reads the client data from either SAN-attached or SCSI-attached disk.

5. Third-party copy device writes data to SAN-attached or SCSI-attached storage.

Third-party

copy device

SCSI

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Seagate ST39175LW Instrukcja Naprawy Strona 38