5.1 System Requirements

This section provides a list of hardware for IBM Z supported by SUSE Linux Enterprise Server. Next, the level of the MicroCode (MCL) used in your IBM Z system, which is very important for the installation, is covered. Additional software to install and use for installation is mentioned at the end of this section.

5.1.1 Hardware

SUSE Linux Enterprise Server has run successfully on the following platforms:

  • IBM zEnterprise EC12 (zEC12) (2827)

  • IBM zEnterprise BC12 (zBC12) (2828)

  • IBM z13 (2964)

  • IBM z13s (2965)

  • IBM LinuxONE Emperor (2964)

  • IBM LinuxONE Rockhopper (2965)

  • IBM z14 (3906)

  • IBM z14 ZR1 (3907)

  • IBM LinuxONE Emperor II (3906)

  • IBM LinuxONE Rockhopper II (3907)

Memory Requirements

Different installation methods have different memory requirements during installation. After installation is completed, the system administrator may reduce memory to the desired size. SUSE recommends using:

1 GB

For installation under z/VM.

1 GB

For installation under LPAR.

1 GB

For installation under KVM.

NOTE: Memory Requirements with Remote Installation Sources

For installation from NFS, FTP, or SMB installation sources or whenever VNC is used, 512MB of memory is required as a minimum. Otherwise, the installation attempt is likely to fail. Further note that the number of devices visible to the z/VM guest or LPAR image affects memory requirements. Installation with literally hundreds of accessible devices (even if unused for the installation) may require more memory.

Disk Space Requirements

The disk requirements depend largely on the installation. Commonly, you need more space than the installation software itself needs to have a system that works properly. Minimal requirements for different selections are:

Installation Scope

Minimum Hard Disk Requirements

Text Mode

1.5 GB

Minimal System

2.5 GB

GNOME Desktop

3 GB

All patterns

4 GB

Recommended Minimum (no Btrfs snapshots): 10 GB

Required Minimum (with Btrfs snapshots): 16 GB

Recommended Minimum (with Btrfs snapshots): 32 GB

Network Connection

A network connection is needed to communicate with your SUSE Linux Enterprise Server system. This can be one or more of the following connections or network cards:

  • OSA Express Ethernet (including Fast and Gigabit Ethernet)

  • HiperSockets or Guest LAN


  • RoCE (RDMA over Converged Ethernet)

The following interfaces are still included, but no longer supported:

  • CTC (or virtual CTC)


  • IP network interface for IUCV

For installations under KVM make sure the following requirements are met to enable the VM Guest to access the network transparently:

  • The virtual network interface is connected to a host network interface.

  • The host network interface is connected to a network in which the virtual server will participate.

  • If the host is configured to have a redundant network connection by grouping two independent OSA network ports into a bonded network interface, the identifier for the bonded network interface is bond0. Or, if more than one bonded interface exists, bond1, bond2, and so on.

  • If the host network connection has not been set up redundantly, the identifier of the single network interface needs to be used. It has the form enccw0.0.NNNN, where NNNN is the device number of the desired network interface.

5.1.2 MicroCode Level, APARs, and Fixes

Documentation about restrictions and requirements for this release of SUSE Linux Enterprise Server be found on IBM developerWorks at http://www.ibm.com/developerworks/linux/linux390/documentation_suse.html. It is recommended always to use the highest service level available. Contact your IBM support for minimum requirements.

For z/VM the following versions are supported:

  • z/VM 6.4

Negotiate the order of installation with your IBM support, because it might be necessary to activate the VM APARs before installing the new MicroCode levels.

5.1.3 Software

When installing SUSE Linux Enterprise Server via non-Linux–based NFS or FTP, you might experience problems with NFS or FTP server software. The Windows* standard FTP server can cause errors, so installing via SMB on these machines is generally recommended.

To connect to the SUSE Linux Enterprise Server installation system, one of the following methods is required (SSH or VNC are recommended):

SSH with Terminal Emulation (xterm compatible)

SSH is a standard Unix tool that should be present on any Unix or Linux system. For Windows, there is an SSH client called Putty. It is free to use and is available from http://www.chiark.greenend.org.uk/~sgtatham/putty/.

VNC Client

For Linux, a VNC client called vncviewer is included in SUSE Linux Enterprise Server as part of the tightvnc package. For Windows, TightVNC is also available. Download it from http://www.tightvnc.com/.

X Server

Find a suitable X server implementation on any Linux or Unix workstation. There are many commercial X Window System environments for Windows and macOS*. Some can be downloaded as free trial versions. A trial version of the Mocha X Server from MochaSoft can be obtained at http://www.mochasoft.dk/freeware/x11.htm.

HINT: Additional Information

Consult the README file located in the root directory of DVD 1 of your SUSE Linux Enterprise Server before installing SUSE Linux Enterprise Server on IBM Z. This file complements this documentation.