Terminology And Conventions Used In This Document; Active/Active And High-Availability Terms; Storage Terms - IBM N6270 Hardware And Service Manual

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Terminology and conventions used in this document

This guide uses the following terminology, command conventions, format
conventions and keyboard conventions.
In this document, the term gateway describes IBM N series storage systems that
have been ordered with gateway functionality. Gateways support various types of
storage, and they are used with third-party disk storage systems. In this case, disk
storage for customer data and the RAID controller functionality is provided by the
back-end disk storage system. A gateway might also be used with disk storage
expansion units specifically designed for the IBM N series models.
The term filer describes IBM N series storage systems that either contain internal
disk storage or attach to disk storage expansion units specifically designed for the
IBM N series storage systems. Filer storage systems do not support using
third-party disk storage systems.
The terms system or storage system refer to either a gateway by itself or a filer,
either by itself or with additional disk drives.

Active/active and high-availability terms

active/active configuration
cluster
HA (high availability)
HA pair

Storage terms

ACP
AT-FCX
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IBM System Storage: N6200 Series Hardware and Service Guide
In the Data ONTAP 7.2 and 7.3 release families, refers to a pair of storage
systems (sometimes called nodes) configured to serve data for each other if
one of the two systems stops functioning. Also sometimes referred to as
active/active pairs.
In the Data ONTAP 7.1 release family, refers to a pair of storage systems
(sometimes called nodes) configured to serve data for each other if one of
the two systems stops functioning. In Data ONTAP 8.x , a cluster is a group
of connected nodes (storage systems) that share a global namespace and
that you can manage as a single virtual server or multiple virtual servers,
providing performance, reliability, and scalability benefits.
In Data ONTAP 8.x, the recovery capability provided by a pair of nodes
(storage systems), called an HA pair, that are configured to serve data for
each other if one of the two nodes stops functioning.
In Data ONTAP 8.x, a pair of nodes (storage systems) configured to serve
data for each other if one of the two nodes stops functioning.
Alternate Control Path is a protocol that enables Data ONTAP to manage
and control the storage expansion unit storage subsystem using a separate
network from the data path, so management communication is not
dependent on the data path being intact and available.
The controller module of the EXN1000 serial advanced technology
attachment (SATA) storage expansion unit.