HP StorageWorks D2D Backup System
LAN
Host4 onwardsHost1 Host2 Host3
Library 1 Library 2 Library 3
Figure 4 Device configuration with multiple hosts
Hosts on an FC network
The host is the network server or PC that you wish to back up.
Library devices on the HP D2D cannot be created for a specific host during installation; they must be
created using the Web Management interface. When you assign a library to a FC port (port 1 or
port 2) it becomes visible on the FC SAN. When you log in, you log in to the switch to which the host
is connected, which means that the library is visible to all other devices on the SAN. You can zone
your network so that only specific devices have access to it, but generally it is visible to all. See also
“HP D2D Backup Systems and Fibre Channel” on page 65.
iSCSI
On an Ethernet network the HP D2D Backup System is configured as an iSCSI device. This means
that the HP D2D Backup System plugs directly into the network, but it presents devices as
directly-attached SCSI autoloaders to host machines. In order to function, it requires an iSCSI initiator.
On Windows systems, this is normally downloaded by the Installation wizard, as described in
“Connecting and installing the HP D2D Backup System” on page 31. For more information about
iSCSI, see “Advanced installation” on page 53. Linux and UNIX users should also refer to the “Linux
and UNIX Configuration Guide” on the HP StorageWorks D2D Backup System CD-ROM for more
information.
Libraries
A tape library is a backup device that has multiple drives and multiple storage slots. Each storage
slot contains a cartridge. The difference between an autoloader and a library is that a library can
support multiple tape drives whereas an autoloader only has one tape drive. This provides considerable
storage capacity and full support for tape rotation strategies. (It may be necessary to upgrade your
backup application to support libraries.)
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