HP StorageWorks XP Disk Array Mainframe Host Attachment and Operations Guide XP24000, XP20000 (A5951 - 96151, September 2007)

Attaching Fibre Channel 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 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 designates 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. Note that defining FCP type channels in the
IOCP reduces the total number of FICON type channels that you can configure.
Accessing storage units using Fibre Channel Protocol from a zSeries host
1. Gather the prerequisite information about the SAN setup. See
“Setting up storage units for zSeries hosts running Linux” on page 64 for a list of the information
that you must collect.
2. Set up the storage unit and configure the LUNs for use with Linux for zSeries. See
“Setting up a Linux system to use Fibre Channel Protocol devices on zSeries hosts” on page 66
for the steps you must perform to set up the storage unit.
3. Manually load the required modules and parameters to access the disks. See Chapter 1 on page
13 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
“Adding additional permanent devices for zSeries hosts running Linux” on page 66 for the steps
you must perform to add permanent devices.
Setting up storage units for zSeries hosts running Linux
You must begin by first collecting the following software configuration information to prepare a Linux
system for accessing the storage unit through a Fibre Channel:
Linux Operations64