8100 Updating Product Software Guide (XCS 6.250) (5697-1716, February 2012)

1 Getting started

This chapter provides information about required kits and reference documentation. Before you

perform the upgrade procedures, ensure that your system meets the requirements.

IMPORTANT: To upgrade from an HSV200-A or HSV210-A controller to an HSV200-B or

HSV210-B controller, HP requires that you also upgrade the I/O modules (A and B) to AD623C

and AD624C on each shelf. If you are upgrading to an EVA6100 (HSV200-B) or EVA8100

(HSV210-B) and you do not already have the 30-10022-01 loop switches installed, you must also

upgrade the loop switches to 30-10022-01. See the HP 4x00/6x00/8x00 Enterprise Virtual Array

User Guide for more information.

Upgrade overview

Depending on the upgrade path for your configuration, an upgrade can be done either online or

offline.

Resynchronization

Resynchronization is the process of restarting the controllers at the end of a controller software

upgrade to begin execution of the new controller software. In an online controller software upgrade,

I/O processing is temporarily disrupted during resynchronization. Resynchronization is complete

when the controller host ports come online and are ready to accept host commands. In an online

upgrade, after resynchronization is complete, an additional delay may occur before host I/O

processing resumes while hosts recover from the disruption. The recovery time is not solely dependent

on the controllers and therefore is not specified by this document. Only the time required to complete

resynchronization is specified. User knowledge of the external environment, including applications,

is required to evaluate the overall impact of the I/O disruption that occurs during an online controller

software upgrade.

Online upgrade

The controller software is upgraded while the controllers are receiving I/O. The controllers

resynchronize simultaneously while hosts and applications continue to run. The resynchronization

during an online upgrade represents a single disruption of I/O, not the multiple disruptions seen

with some upgrade types. However, you must consider host and application timeouts when doing

an online upgrade.

Offline upgrade (shutdown upgrade)

All host I/O to the storage system must be stopped. All applications and hosts are shut down before

you begin the controller upgrade, and restarted when the upgrade is complete.

An offline upgrade requires scheduling time with application managers and having staff on hand

to shut down and restart applications and hosts. While actual upgrade time may be short, offline

upgrades can require several hours to complete from the time first application shuts down until all

hosts and applications have returned to service.

6 Getting started