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Chapter 4
Peripherals and Accessories
HP e3000 Business Servers Configuration Guide – Effective 1/04 4-121
Information Subject to Change
Long-Distance Configurations (Not supported on MPE/iX)
Long-distance topologies are part of the supported configurations, but may not specifically be represented in
this document. Long-distance scenarios may be obtained with the following configurations by replacing
host/device connections with any of the combinations of hubs/switches as shown below. Hubs/switches may
be cascaded no more than two layers deep and must meet the Fibre-Channel distance criteria (10,000- and 500-
meter) for cables.
Figure 4.7.1.10 Long-Distance Substitutions
Hub/Switch
Hub/Switch
Hub/Switch
Long-distance cascaded hubs must
meet distance criteria and be no more
than two layers deep.
SAN Definitions
Configurations in this document that include a SAN assume the following definition of a SAN or fabric:
A dedicated network of servers and storage devices all connected to a fabric supporting block access
technologies. For the purposes of this document, a fabric is defined as a hardware configuration containing at
least one switch, which is responsible for frame routing.
Open SAN is defined as heterogeneous (multiple vendor) servers and operating systems, heterogeneous
storage, and heterogeneous infrastructure components. Pooled storage access is dependent on a LUN security
methodology (zoning, partitioning, or dedicated LUN security) to provide data access by multiple
heterogeneous servers. Multiple server access to common data is available only to homogeneous servers using
server coordination software (e.g., MC/ServiceGuard for HP-UX and Cluster/iX for MPE/iX). Parallel server
access is not supported on MPE/iX.
SAN Characteristics:
• Utilizes a switch-based topology
• Allows cascaded switches
• Supports heterogeneous (multiple vendor) storage
• Switch based
• Heterogeneous server/OS capable
• Heterogeneous (multiple vendor) storage
• Fabric login
• Uses LUN Security or zoning
Note: The SAN does not support common data access for heterogeneous servers.
SAN Manager (management software):
Requires fabric login
• Employs LUN Security or zoning