Introduction; Summary Of Changes - IBM TS7700 Series User Manual

August 15, 2017

Introduction

The IBM TS7700 Series is the latest in the line of tape virtualization products that has revolutionized the
way mainframe customers utilize their tape resources. One of the key reasons to use tape is for recovery of
critical operations in the event of a disaster. The TS7700, in a Grid configuration, provides for automatic,
remote replication of data that supports recovery time and recovery point objectives measured in seconds.
For customers that do not require the recovery times that can be obtained in a Grid configuration, a new
function called Copy Export is being introduced for the TS7700. With Copy Export, logical volumes
written to a TS7700 can be removed from the TS7700 and taken to an offsite location to be used for disaster
recovery. This white paper describes the use of this function.
It is assumed throughout this white paper that the reader is familiar with the TS7700 and in using standard
labeled tape volumes and MVS tape utilities.

Summary of Changes

• Version 1.1
• A descriptive header line was added to the copy exported physical volume information returned in
the export list status file.
• Clarified the requirement for scratch physical volumes during the execution of a copy export
operation.
• Added dual LM operational requirements during copy export recovery.
• Clarified how copy export recovery deals with the discovery of duplicate volumes on the second
library manager partition.
• Added a note describing a scenario where a logical volume that is only cache resident may not be
eligible for a copy export operation because it was removed from the premigration queue when it
was remounted after being created.
• Version 1.2
• Added the starting and ending logical block ID where a logical volume resides on a copy exported
tape to the export status file record.
• Added instructions for when to add scratch physical volumes during a copy export recovery
operation.
• Clarified the actions necessary if duplicate logical volumes are encountered during copy export
recovery.
• To avoid confusion about using the copy export recovery for testing disaster recovery, the check
box, 'Disable premigration on construct change' has been changed to 'Disaster Recovery Test
Mode' and the text descriptions clarified to better explain what impact this has on the operation of
the TS7700.
• When to verify or change storage management construct actions has been moved until after the
recovery process has been completed to simplify this step.
• When the physical volumes to be used for copy export recovery are added to the library, they are no
longer placed into the Unassigned Volume category. They are directly moved into the insert
category.
• Added to the copy export recovery considerations section an item regarding how storage construct
names and definitions are recovered to the library manager database and the effect that can have if
the same storage construct names are already defined on another library partition.
© Copyright IBM Corporation, 2017 Page 4 of 117