Attaching Fcp Adapters To Zseries Hosts Running Linux; Fcp Support; Accessing Storage Units Using Fcp Protocol From A Zseries Host - HP XP20000/XP24000 Operation Manual

NOTE:
zSeries FCP host system running SuSE SLES 9 or Red Hat Enterprise Linux 3.0 can only be attached
through a switched-fabric configuration. Hosts cannot be attached using a direct configuration.

Attaching FCP adapters to zSeries hosts running Linux

Linux solutions are available for the 31- and 64-bit environments. The availability of this option depends
on the zSeries model and the Linux distribution. Fibre Channel support is available for both direct
and switched attachment.
Linux for S/390 (31-bit)
Linux for S/390 is a 31-bit version of Linux. It also runs on zSeries models in 31-bit mode. The 31-bit
limitation limits the addressable main storage to 2 GB.
Linux for zSeries (64-bit)
Linux on zSeries supports the 64-bit architecture on all zSeries models. The 64-bit support eliminates
the 31-bit storage limitation of 2 GB.

FCP support

Linux for zSeries can access FCP and FICON/zHPF controllers and devices with the appropriate I/O
driver support. Linux can run using the operating system that came with the system in a logical partition
or as a guest operating system under z/VM Version 4 Release 4 or later. For the most current list of
supported operating system releases, see the IBM website for interoperability information or contact
your HP representative.
A zSeries FCP channel is required to attach storage through a Fibre Channel. An FCP channel requires
the same FICON channel hardware that is used for FICON channel. FICON channel hardware can
be designated as either a FICON or FCP channel by specifying the correct channel path type (FC or
FCP) in the IOCP channel path ID (CHPID statement. The FICON/zHPF requires a CHPID type FC and
uses the FCP link transport. Defining FCP type channels in the IOCP reduces the total number of FICON
type channels that you can configure.

Accessing storage units using FCP protocol from a zSeries host

1. Gather the prerequisite information about the SAN setup. See
hosts running
2. Set up the storage unit and configure the LUNs for use with Linux for zSeries. See
Linux system to use FCP protocol devices on zSeries
perform to set up the storage unit.
3. Manually load the required modules and parameters to access the disks. See
7 for the steps you must perform to view LUNs and set the Linux system to use FCP devices.
4. Make the disks permanently accessible. See
Linux" on page 52 for the steps you must perform to add permanent devices.
50 Linux operations
Linux" on page 51 for a list of the information that you must collect.
"Setting up storage units for zSeries
hosts" on page 52 for the steps you must
"Adding permanent devices for zSeries hosts running
"Setting up a
Chapter 1 on page