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IBM® TS7700 Series z/OS Host Command Line Request DIAGDATA Guidance

Document Author:
Additional Author(s):

Parker Wall
takeshi nohta, Joseph M Swingler

Document ID:


Doc. Organization:

IBM Systems

Document Revised:


Product(s) covered:

# 3956; # 3957; TS7700; TS7720; TS7740

Abstract: The DIAGDATA Library Request command was introduced to help analyze TS7700 cluster to cluster handshakes, such as logical volume mounts and demounts. The command helps summaries a series of key handshake timing metrics as well as failure counts among peer handshakes. The goal of introducing DIAGDATA is to diagnose and isolate persistent cluster issues which can cause I/O delays or problems. The command is only informational and takes no action on the targeted grid.

The document has been updated to include changes to the output format when all clusters in the grid are running R4.1.2 machine code, or higher.
IBM TS7700 Series zOS Host Command Line Request DIAGDATA Guidance V1.2.pdfIBM TS7700 Series zOS Host Command Line Request DIAGDATA Guidance V1.2.pdf




Operational Management


Cloud; Enterprise Application Solutions (EAS/ERP)


IBM Storage; IBM Z

S/W Pillar(s):

IBM System z Software


z/VM; z/OS; z/VSE


3957, 3957-V07, 3957-VEB, 3957-VEC, TS7720, TS7740, TS7760, TS7700, DIAGDATA

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