Overland Storage REO 9000 - Manual (Page 87)

Associating Targets (Devices) and Initiators W 87
CHAPTER
9 Associating Targets (Devices)
and Initiators
The main steps involved in associating targets (REO Devices) and
initiators with each other include:
Step 1 Understanding how the targets and initiators must be identified so that
they can successfully communicate with each other.
Step 2 Making sure that IP addresses and names match on both the targets and
the initiators.
Step 3 Making another backup copy of the REO SoftKey so that your
configuration information is preserved.
Understanding How Initiators and Targets (Devices) are
Connected
To configure the REO Appliance as a backup-and-recovery-acceleration
appliance, you must provide target and initiator information. Each
volume on the REO Appliance is a target (REO Device); the servers are
initiators.
If you are using iSCSI initiators, an iSCSI name is required both at the
targets and at the initiators. An iSCSI target name is required because
it uniquely identifies a target as a storage resource for the initiators. An
iSCSI initiator name is required because it helps identify an initiator for
the purpose of target resource allocation (that is, which initiator has
access to which target resource).
If you are using FC initiators, you must provide a WWNN and WWPN for
the same purpose of providing a unique identifier.
Reviewing iSCSI Naming Conventions
iSCSI names must be unique within the domain of the end user.
However, because user domains can potentially merge with other user
domains, the iSCSI naming mechanism is structured to ensure
worldwide uniqueness. To ensure both domain and worldwide name
uniqueness, iSCSI provides for the use of different types of naming
mechanisms, based on the naming authority. Each iSCSI name is
prefixed with a short designator string that indicates the type of naming