Specifications

Chapter 4. Attaching to an IBM AS/400 or iSeries host

This chapter describes the host system requirements. This chapter also provides

the procedures to attach an ESS to an IBM AS/400 or IBM iSeries host system with

SCSI and fibre-channel adapters.

Notes:

1. You cannot serially connect more than one AS/400 host system to the ESS.

2. You cannot interconnect more than one ESS attachment to a single port on the

host adapter.

3. Your IBM AS/400 host system supports the ESS as a peripheral device.

The ESS emulates an IBM 9337 subsystem when you attach it to an IBM AS/400

host system with the SCSI adapter. You must configure the ESS so that it appears

tobe1-8logical units (LUNs). Because the IBM AS/400 host requires a separate

address for each LUN, configure the ESS to report a unique address for each

virtual drive defined to the IBM AS/400 host. See “9337 subsystem emulation” on

page 46 for more details about emulating the 9337 subsystem.

Note: You cannot use the IBM Subsystem Device Driver on the AS/400 host

system.

Attaching with SCSI adapters to an AS/400 host system

This section describes how to attach an ESS to an AS/400 host system with SCSI

adapters. For procedures about how to attach an ESS to an iSeries host system

with fibre-channel adapters, see “Attaching with fibre-channel adapters to the

iSeries host system” on page 48.

Attachment requirements

This section lists the requirements for attaching the ESS to your host system:

1. Obtain the documents for the AS/400 host system.

2. See the following Web site for details about program temporary fixes (PTFs)

that you need to install on your AS/400 host system:

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

3. Check the LUN limitations for your host system. See Table 6 on page 11.

4. Contact your IBM service support representative to install and configure the IBM

ESS.

Attachment considerations

This section lists the attachment considerations for an AS/400 host system. See the

following Web site for a list of AS/400 and iSeries models to which you can attach

an ESS:

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

Notes:

1. You cannot specify a LUN size of 70.564-GB for a SCSI-3 attachment.

2. You can specify1-8LUNs for each SCSI-3 attachment to a specific ESS host

adapter port.

3. You can specify a LUN serial number that is eight characters. For example, you

can specify a LUN serial number, 0L0PPNNN, where: