IBM AIX-AK FZK 2005 manual Preferred Path,  DS6000 uses concept of preferred path

IBM Systems Group

Preferred Path

DS6000 uses concept of preferred path

Volumes are owned by one controller

Volumes can be accessed through both controllers

Data is transferred to and from owning controller to requesting controller internally -> performance penalty

SDD knows preferred path automatically

Access only through owning controller if possible

Dynamic load balancing across ports of preferred controller

Other multipathing solutions theoretically possible, but must (still) be configured manually

AIX-AK FZK 2005 © 2005 IBM Corporation