HP StorageWorks Enterprise Backup Solution with HP Data ...

• Enterprise reporting—The MoM can generate reports on a single-cell basis as well as for the entire
enterprise environment.
EBS-specific requirements
EBS with Data Protector requires that the Media Agent be installed on all clients that have access to
SAN-shared tape devices. One server must have the Cell Manager software installed while all other
servers only require the Media Agent. Disk Agents are also required for clients (SAN or LAN) that require
a disk service to be read for backup.
Shared library and tape devices with multiple systems
Data Protector allows libraries and individual tape drives to be dynamically shared between multiple Data
Protector clients that run the Media Agent. Each server can access any of the shared drives as needed and
each server "owns" the drive it has active. Data Protector uses a lock name to ensure that an active tape
drive is reserved to an individual server, within the Data Protector cell. This prevents two Data Protector
Media Agents from accessing the same physical device at the same time. See the HP Data Protector
Administrator's Guide for more information on configuring device locking.
IMPORTANT: Unless special configuration steps are taken, a SCSI reserve is not placed on the active tape
device. The locking mechanism is only valid for servers that are within the Data Protector cell. Rogue
servers can potentially disrupt or corrupt active Data Protector backup sessions. Care must be taken with
servers that have access to shared tape devices when rebooting, performing device scans, or when using
utilities like tar or dd in UNIX. For more information, see the "Rogue applications" section in the HP
StorageWorks Enterprise Backup Solution Design Guide located at http://www.hp.com/go/ebs.
Data Protector provides the Device Autoconfiguration Wizard to make configuring shared libraries and
drives fast and easy. Using the wizard helps to eliminate mistakes that are made when shared devices are
manually configured. For the complete list of supported operating systems and platforms, please see
http://www.hp.com/go/dataprotector.
The Autoconfiguration Wizard is run from the Cell Manager, or any client that runs a Data Protector GUI
that is connected to the Cell Manager. The wizard does the following activities:
• Performs device discovery on each client that has the Media Agent installed
• Adds robotic libraries and shared drives to the Data Protector Devices configuration
• Configures device locking for shared drives
• Can automatically configure "MultiPath devices"
Multiple paths to tape devices
In an environment with shared tape devices, there may be many paths a server can take to reach a
particular tape device. A server running the Media Agent within Data Protector can access a shared tape
device through two connection paths. The first is a "direct" path (bus, target, lun) to a shared tape device
over Fibre Channel, SCSI, or iSCSI. The second is an "indirect" path to that same shared tape device
through the LAN to an alternate server running a Media Agent. See Figure 1 for a depiction of a direct
and indirect path.
A shared tape device that can be accessed either directly or indirectly by a Media Agent server is defined
as a "MultiPath" device within Data Protector. To ensure optimal performance, verify that the direct path is
used for backups. Slow backup performance may be an indicator that the indirect path is being used for a
backup.
To verify the order of the configured paths to a shared "MultiPath" tape device, review the drive properties
for each shared tape device. The following example explains how to review and configure a MultiPath
tape device.
Enterprise Backup Solution with HP Data Protector implementation guide 11