SVA - NDCL (non-disruptive code load) with Coupled Data Sets in a Sysplex Environment

Asset ID:	1-71-1005640.1
Update Date:	2011-05-25
Keywords:

Solution Type Technical Instruction Sure

Solution 1005640.1 : SVA - NDCL (non-disruptive code load) with Coupled Data Sets in a Sysplex Environment

Applies to:

Sun StorageTek V2X SVA Disk System - Version: Not Applicable to Not Applicable [Release: N/A to N/A]
All Platforms
Reviewed for currency 05/25/11

Goal

INSTALLING MICROCODE NON-DISRUPTIVELY IN SYSPLEX ENVIRONMENTS

Solution

In SYSPLEX environments, the control unit busy sequence created by the concurrent microcode activation may create error messages with the COUPLED Data Sets in the XCFAS address space.

Customers in these environments should be aware of this possibility and be prepared to take appropriate recovery actions.
Ask the customer to verify that primary and alternate coupled data sets are operational and NOT ON THE SAME PHYSICAL SUBSYSTEM that is to receive the microcode activation. Issue this MVS display command: D XCF,COUPLE,TYPE=ALL
To de-allocate the primary couple data set and dynamically switch the alternate to the primary, issue this MVS control command: SETXCF COUPLE,PSWITCH
To assign a formatted, spare couple data set to be the new alternate, issue this MVS control command:SETCF COUPLE,ACOUPLE=(alt-dsname,alt-volume),TYPE-dstype
After the microcode activation is complete, the customer may choose to reassign the couple data sets.

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IBM Manual References:

MVS System Commands, Setting Up a SYSPLEX

D.H. - 11/17/98 - CREATED.

Previously Published As
91022

Change History
Date: 2007-10-08

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