Use this dialog box to change the owner of the
selected volume.
For media sharing, the media owner defines who
can write to the volume.
Valid only if a server group owns the selected
volume.
But in reading this it still looks like only 1 media sever can write
to a volume.
Why so many media servers?
Configuring server groups for media sharing
Note: The access control feature of Sun
StorageTeck ACSLS controlled robots is not compatible with media sharing.
Media sharing restricts volume access by the requesting hosts IP address. Use
caution when you implement media sharing in an ACSLS environment.
You can configure server groups that can
share media. A server group
is a group of NetBackup servers that are used for a common purpose. A media sharing group is a server group
that shares media for write purposes. A media sharing group can contain the
following:
•NetBackup
master server
•NetBackup
media servers
•NDMP tape
servers
•Virtual
host names of NetBackup media servers in a cluster
Servers can be in more than one group. All
members of a server group must have the same NetBackup master server. Only
NetBackup 6.5 and later systems can be in server groups.
Media sharing provides the following
benefits:
•Increases
media utilization by reducing the number of partially full media.
•Reduces
media-related expenses because fewer media are required and fewer media are
vaulted (NetBackup Vault option).
•Reduces
administrative overhead because you inject fewer scratch media into the
robotic library.
•Increases
media life because media are mounted fewer times. Media are not repositioned
and unmounted between write operations from different media servers.
Reducing media mounts requires appropriate
hardware connectivity between the media servers that share media and the
drives that can write to that media. Appropriate hardware connectivity may
include Fibre Channel hubs or switches, SCSI multiplexors, or SCSI-to-fibre
bridges.
To configure media sharing, you must do the
following:
•Ensure
the appropriate connectivity between and among the media servers and robots
and drives.
•Optionally,
configure NetBackup for media sharing by setting the master server Enable Unrestricted Media Sharing for All Media
Servers host property.
For more information, see Media
properties.
•Optionally,
configure the volume pools to use for media sharing by setting the Maximum number of partially full media
property for those pools.
For more information, see Adding
a new volume pool or Changing
the properties of a volume pool.
•Create the media
sharing groups as described in this section.
If you allow unrestricted allow media
sharing in your NetBackup environment, you do not have to create media
sharing groups. Unrestricted media sharing is set by using the master server Enable Unrestricted Media Sharing for All Media
Servers host property.
•Configure backup
policies that use the volume pools and media sharing groups by setting the Policy Volume Pool and Media Owner properties of the backup
policies.
For more information, see Policy
Attributes tab.
Related topics
•Changing
the owner of a volume
To create a
server group
- In the
NetBackup Administration Console, select Media and Device Management > Devices > Server Groups.
- Select Actions > New Server Group.
- In the New
Server Group dialog box, enter or select the appropriate information.
To add a server to the group, select it in
the Servers Not in Group window and click Add.
To remove a server from the group, select it
in the Servers in Group window and click Remove.
For descriptions of the fields, see Server
group properties.
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