Because we are allowing multiple Linux on zSeries images to simultaneously 

access the same disk drives, we turned off CMS minidisk caching. The CMS 

commands we used while logged on to MAINT to turn this feature off and then 

display their status are:

SET MDC RDEV beginning_device ending_device OFF

query mdc rdev 8020 8028, 8120 8128, 8220 8228, 8236 8237

Example 25 shows the output display of the status of our minidisks.

Example 25   CP query mdc rdev output 

Minidisk cache OFF for 8020

Minidisk cache OFF for 8021

Minidisk cache OFF for 8022

Minidisk cache OFF for 8023

Minidisk cache OFF for 8024

Minidisk cache OFF for 8025

Minidisk cache OFF for 8026

Minidisk cache OFF for 8027

Minidisk cache OFF for 8028

Minidisk cache DFLTOFF for 8120

Minidisk cache OFF for 8121

Minidisk cache OFF for 8122

Minidisk cache OFF for 8123

Minidisk cache OFF for 8124

Minidisk cache OFF for 8125

Minidisk cache OFF for 8126

Minidisk cache OFF for 8127

Minidisk cache OFF for 8128

Minidisk cache OFF for 8220

Minidisk cache OFF for 8221

Minidisk cache OFF for 8222

Minidisk cache OFF for 8223

Minidisk cache OFF for 8224

Minidisk cache OFF for 8225

Minidisk cache OFF for 8226

Minidisk cache OFF for 8227

Minidisk cache OFF for 8228

Minidisk cache OFF for 8236

Minidisk cache OFF for 8237

z/VM switch configuration

We created a z/VM vswitch definition with the MAINT user ID to allow our 

dynamically provisioned SAP application servers to be configured with virtual 

network device addresses and further simplify the overall network configuration.

Dynamic Provisioning of SAP Environments using IBM DI for mySAP and Tivoli Provisioning Manager

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