content_image/1014073.jpg
How the driver, bundle, EC stream, MCL, and MCFs interact with each other is shown in Figure 10-21. 

<img src='content_image/1014073.jpg'>

## MCL Application 

By design, all MCLs can be applied concurrently, including: 

GLYPH<SM590000> During MCL Bundle application. 

GLYPH<SM590000> During Enhanced Driver Maintenance (Concurrent Driver Upgrade). For example, for z14 at Driver 32, the original GA level, upgrade from Driver 32 to Driver 36 (also applicable to z14 ZR1). 

## MCL Activation 

By design and with planning, MCLs can be activated concurrently. Consider the following points: 

GLYPH<SM590000> Most MCLs activate concurrently when applied. 

GLYPH<SM590000> A few MCLs are “Pended” for scheduled activa tion because activation is disruptive in some way (Recent History: Most commonly seen for traditional OSA-Express features or Crypto-Express features). 

GLYPH<SM590000> Activate traditional I/O Feature Pended MCL – LIC on the hardware feature: 

– Display Pending MCLs using HMC functionor Resource Link Machine Information Reports 

