■ It is connected to drives DRV1 and DRV2 through SAN hardware.
■ It is configured to be the EMM server, which is also the device allocation host
See “About the device allocation host” on page 141.
■ It controls the robotics. Except for ACS or TLM robot types, only one robot
control host exists for each robot.
■ It can be configured (optionally) as a highly available (HA) server.
For a process flow diagram of Shared Storage Option components, see the
NetBackup Troubleshooting Guide.
About SAN media servers
NetBackup Shared Storage Option.
SAN media servers are NetBackup media servers that back up their own data. SAN
media servers cannot back up the data that resides on other clients.
SAN media servers are useful for certain situations. For example, a SAN media
server is useful if the data volume consumes so much network bandwidth that it
affects your network negatively.
When you define a backup policy for a SAN media server, add only the SAN media
server as the client.
The NetBackup Shared Storage Option can use NetBackup SAN media servers.
About SSO and the NetBackup EMM server
To coordinate network-wide allocation of tape drives, the NetBackup Enterprise
Media Manager (EMM) manages all shared tape requests in a SAN. EMM responds
to requests from multiple instances of NetBackup master servers, media servers,
and NetBackup SAN media servers.
For shared drive configurations, the host that is configured as the EMM server is
also known as the device allocation host.
See “About the device allocation host” on page 141.
EMM maintains shared drive and host information. Information includes a list of
hosts that are online and available to share a drive and which host currently has
the drive reserved. The Media Manager device service (ltid) requests shared drive
information changes.
About scan hosts
Scan hosts are a component of the NetBackup Shared Storage Option.
139Introducing the Shared Storage Option
About Shared Storage Option components
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