Iscsi; Mail Slots (Import/Export Elements); Physical Tape Drives; Device Configuration With Multiple Hosts - HP StorageWorks D2D100 - Backup System User Manual

Figure 4 Device configuration with multiple hosts

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
see "Advanced
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.)

Mail slots (import/export elements)

A mail slot is a term borrowed from tape terminology to identify a dedicated slot that is used specifically to
import and export cartridges. They are sometimes called import/export elements by backup applications.
Backup applications that support this feature move cartridges from the mail slot when the user runs an
Export job, and look for cartridges in the mail slot when the user runs an Import job.

Physical tape drives

A physical tape drive is a tape drive that is attached to the HP D2D Backup System or the host computer,
so that data can be moved from the HP D2D Backup System and stored offsite. (It should not be confused
with the tape drive device that is attached to the library device on the HP D2D Backup System (see
"Devices (Configuration)" on page 90.)
Host1 Host2
Library 1
HP StorageWorks D2D Backup System
installation" on page 45. Linux and UNIX users should also refer to the "Linux and UNIX
Host3
Library 2
System" on page 27. For more information about iSCSI,
Host4 onwards
LAN
Library 3
D2D Backup System HP D2D2503
21