Category Archives: Mainframe

z/VM SSI: make your Linux relocatable

Virtualization systems like KVM, Xen, or z/VM offer the possibility to move running guests from one physical server to another one without service interruption. This is a cool feature for the system administrator because he can service a virtualization host … Continue reading

Posted in Mainframe, SLES12, systemd, z Linux, zVM | Leave a comment

Multiple Linux Consoles in z/VM

The standard method to access z/VM is using a 3215 terminal with a terminal emulator. With linux, the x3270 package provides a free emulator for these terminals. One of the features of z/VM is, that you can define several consoles … Continue reading

Posted in 3270, Mainframe, SLES12, z Linux, zVM | Tagged , , , , , | 1 Comment

Online Enabling new DASD from a Linux LPAR on System z

When running a mainframe, there are reasons why you you want to add new control units and DASD disk devices. Assuming that you already added the hardware configuration to the system, you will find that a still running LPAR with … Continue reading

Posted in block devices, DS8000, Mainframe, Uncategorized, z Linux | Leave a comment

Persistent IUCV Network Devices

On mainframes, Inter User Communication Vehicle provides a means to exchange data between two guests in z/VM. Some time ago, this has been one of the preferred networking methods between two Users (virtual machines) on z/VM. From a linux perspective, … Continue reading

Posted in Mainframe, Networking, udev, z Linux | Tagged , , | Leave a comment