Seagate ST39103LC Podręcznik Użytkownika Pobierz pdf (Strona 15)

Chapter 2. SVA Path Hardware Setup 5

Chapter 2. SVA Path Hardware Setup

Fibre Addressing Concepts

Host Bus

Adapters/Initiators

The terms “host bus adapter” and “initiator” mean essentially the

same thing. Typically, the HBA is a card within the host that, in its

role as initiator, issues commands on the Fibre channel.

Domains in Fibre

Channel Connection

StorageTek uses the concept of “domains” to allow open systems

hosts access to blocks of logical devices (the domains) within an

SVA. A domain is an additional layer of device addressing, but one

that is manually configured by the CSE in the SVA. This layer of

addressing divides the SVA into “domains of access.” There can

be up to 16 (0–15) domains per SVA, with each domain having one

target with 255 LUNs. There is a limit of 1024 total devices

available within an SVA.

Each open systems host initiator is connected with Fibre cables to

a controller card port, giving it access to the devices that have been

configured within its domain. (An open systems host cannot see

devices in domains other than the one to which it is attached.)

Full SVA Path functionality requires that redundant initiators can

access the SVA over redundant data paths.

1. Using all allowed domains, targets, and LUNs, there are more than 1024 logical devices, but

the SVA has a limit of 1024 logical devices.

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Seagate ST39103LC Podręcznik Użytkownika Strona 15