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

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