IBM eServer zSeries 990 Technical Guide

Chapter 3. I/O system structure 99

Adapter interruptions apply to a z990 FICON Express channel when in FCP mode (FCP

CHPID type), which supports attachment of SCSI devices in a Linux for zSeries environment.

z990 FCP SCSI IPL feature enabler (FC 9904)

This optional z990 feature (FC 9904) allows Linux on zSeries operating system IPL from a

SCSI or FCP disk. Both IPL of logical partition images and z/VM guests are supported.

Using this feature, Linux logical partitions can be started and run completely from SCSI or

FCP disks. Further, a stand-alone dump program can be loaded from such a SCSI or FCP

disk in order to dump the contents of a logical partition, and the dump data can be written to

this same disk.

z990 FCP concurrent patch

FICON channels, when configured as CHPID type FCP, support concurrent patches allowing

the application of a new Licensed Internal Code (LIC) without requiring a configuration of

off/on. This is a zSeries exclusive FCP availability feature, available with FICON Express

feature codes 2319 and 2320.

3.4.4 OSA-Express adapter

What follows is a discussion of the connectivity options in the OSA-Express environment. The

z990 supports the following OSA-Express features:

򐂰 OSA-Express Gigabit Ethernet (GbE) Long Wavelength (LX), feature code 1364

򐂰 OSA-Express Gigabit Ethernet (GbE) Short Wavelength (SX), feature code 1365

򐂰 OSA-Express Gigabit Ethernet (GbE) Long Wavelength (LX), feature code 2364

– Brought forward on an upgrade only

򐂰 OSA-Express Gigabit Ethernet (GbE) Short Wavelength (SX), feature code 2365

– Brought forward on an upgrade only

򐂰 OSA-Express 1000BASE-T Ethernet, feature code 1366

򐂰 OSA-Express Fast Ethernet, feature code 2366

– Brought forward on an upgrade only

򐂰 OSA-Express Token Ring, feature code 2367

A z990 server can support a maximum of 24 OSA-Express features (48 ports).

Table 3-10 OSA-Express features support

Note: If FDDI or ATM connectivity is desired, a multiprotocol switch or router with the

appropriate network interface (for example, 1000BASE-T Ethernet, Gigabit Ethernet) can

be used to provide connectivity between the z990 server and an FDDI or ATM network.

I/O feature Feature codes

Number of Maximum number

PCHID

CHPID

definition

Config.

rules

notes

Ports

per card

Ports

increments

Ports

I/O

slots

OSA-E Gbit Ethernet

LX/SX

1364/1365

(2364/2365)

2248

(24)

24

(12)

yes OSD 1, 2, 3

OSA-E 1000BASE-T

Ethernet

1366 2 2 48 24 yes OSE, OSD,

OSC

1, 2