Fujitsu ETERNUS AX Series Installation And Cabling Manual

Also see for ETERNUS HX2000 Series: Replacement manual

| How to read a worksheet to cable controller-to-stack connections for multipathed connectivity |How to read a worksheet to cable controller-to-stackconnections for multipathed connectivityYou can use this example to guide you through how to read and apply a completed worksheet to cablecontroller-to-stack connections for disk shelves with IOM12 modules for multipathed connectivity.Before you beginYour HA pair or single-controller configuration cannot be a HX2000 configuration. HX2000 configurationsuse a unique worksheet; see the “Controller-to-stack cabling worksheets and cabling examples for commonHX2000 configurations” section.About this task• This procedure references the following worksheet and cabling example to demonstrate how to read aworksheet to cable controller-to-stack connections.The configuration used in this example is a multipath HA configuration with two quad-port SAS HBAs(eight SAS ports) on each controller and two stacks of disk shelves with IOM12 modules. Port pairs arecabled by skipping every other port pair in the worksheet.Note: When you have more port pairs than you need to cable the stacks in your system, the best practiceis to skip port pairs to optimize the SAS ports on your system. By optimizing SAS ports, you optimize yoursystem's performance.• If you have a single-controller configuration, skip substeps b and d for cabling to a second controller.• If needed, you can refer to the “SAS cabling rules” section for information about the controller slotnumbering convention, shelf-to-shelf connectivity, and controller-to-shelf connectivity (including the useof port pairs).The port pairs are cabled using every other port pair in the worksheet: 1a/2b and 1c/2d....The port pairs beingskipped to use every other one in the list: 1a/2b and 1c/2d.42