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Appendix B. Migrating from SCSI to fibre-channel

This chapter describes how to migrate disks or logical volumes within the ESS from

SCSI to fibre-channel for the following host systems:

v Hewlett-Packard

v RS/6000 (AIX

v Windows NT

v Windows 2000

An experienced system administrator should perform the migration.

There are two methods for migrating:

v Nonconcurrent

v Concurrent

See the ESS Fibre-Channel Migration Scenarios white paper for information about

changing your host system attachment to the ESS from SCSI and SAN Data

Gateway to native fibre-channel attachment. The white paper is available at the

following ESS Web site:

www.storage.ibm.com/hardsoft/products/ess/refinfo.htm

See the Implementing Fibre-Channel Attachment on the ESS Redbook. This book

helps you to install, tailor, and configure fibre-channel attachment of open-systems

hosts to the ESS. It gives you a broad understanding of the procedures involved

and describes the prerequisites and requirements. It also shows you how to

implement fibre-channel attachment. This book also describes the steps you must

perform to migrate to direct fibre-channel attachment from native SCSI adapters. It

describes the steps you must perform to migrate from fibre-channel attachment

through the SAN Data Gateway (SDG).

www.storage.ibm.com/hardsoft/products/ess/support/essfcwp.pdf

Software requirements

You must have the following software before you migrate from SCSI adapters to

fibre-channel adapters:

v Internet browser (Netscape or Internet Explorer)

v SAN Data Gateway Explorer

v Disk Administrator

Preparing a host system to change from SCSI to fibre-channel

attachment

Before you migrate, you must have at least one ESS with SCSI adapters already

installed.

Before you can use ESS Specialist to change a host system attached to the ESS

from SCSI to fibre-channel, perform the following steps:

1. Upgrade the microcode and install the IBM Subsystem Device Driver (optional).

For more information about the IBM Subsystem Device Driver, see the Web

site: