In this IBM® Redpaper™ publication we discuss new path management attributes that were added to the IBM Subsystem Device Driver Path Control Module (SDDPCM) for IBM AIX®. These new attributes and associated algorithms were developed to address a path failure condition referred to as temporary/recurring.

This paper is intended to familiarize you with both the temporary/recurring path failure condition and the new attributes available in SDDPCM version 2.6.3.2 that are designed to address it. Additionally, this paper provides guidance regarding the implementation of these attributes and other SDDPCM tunable attributes for improved availability.