IBM System storage DS6000 Series, Attachment Manual

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You can run Linux as a virtual machine using z/VM. VM provides virtualization of
central processing units, I/O subsystems, and memory. You can have hundreds
of Linux systems running on a single S/390 or zSeries host. For example, you
can offer a complete Linux server environment to each of the application
developers and host production systems all on the same S/390 or zSeries host.
For SUSE SLES 9 or Red Hat Enterprise Linux 3.0, IBM supports 31- and 64-bit
Linux for zSeries for a storage unit and ESCON, FICON, and fibre-channel protocol
(FCP) attached host systems.
Note: You can attach a zSeries FCP host system running SUSE SLES 9 or Red
Hat Enterprise Linux 3.0 only through a switched-fabric configuration. You
cannot attach the host through a direct configuration.
Attaching FCP adapters on zSeries hosts
This section tells you how to attach fibre-channel protocol (FCP) adapters to a
zSeries host running Linux.
Attaching FCP adapters on zSeries hosts running Linux
This section provides the information you need to attach FCP adapters on 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. FCP 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 is currently available for S/390
Parallel Enterprise Server
™
G5 and G6 and the Multiprise
®
3000 processors. 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 zSeries processors. This
includes 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 either natively 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 Interoperability Matrix at
http://www.ibm.com/servers/storage/disk/ds6000/interop.html.
To attach storage through fibre-channel, you must have a zSeries FCP channel. An
FCP channel requires the same FICON channel hardware that is used for FICON
channel. You can define FICON channel hardware 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. Thus, defining FCP type channels in the IOCP
reduces accordingly the total number of FICON type channels that you can
configure.
Chapter 10. Attaching to an IBM S/390 or IBM eServer zSeries host
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