Chapter 4

Peripherals and Accessories

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

HP e3000 Business Servers Configuration Guide – Effective 1/04

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Information Subject to Change