Lenovo DM120S, Installation And Cabling Manual, Page: 47 / 70

Chapter 8. Controller-to-stack cabling worksheet template for
multipathed connectivity
By completing the worksheet template, you can define the controller SAS port pairs you can use to cable
controllers to stacks of disk shelves with IOM12 modules to achieve multipathed connectivity in an HA pair
configuration. You can also use the completed worksheet to walk yourself through cabling the multipathed
connections for your configuration.
Before you begin
Your HA pair configuration cannot be a DM3000x, DM5000x, or DM7000x configuration. DM3000x,
DM5000x, or DM7000x configurations use a unique worksheet; see the “Controller-to-stack cabling
worksheets and cabling examples for common DM3000x, DM5000x, or DM7000x configurations” section.
About this task
• This procedure and worksheet template is applicable to cabling multipathed connectivity for a multipath
HA or multipath configuration with one or more stacks. Examples of completed worksheets are provided
for multipath HA and multipath configurations.
A configuration with two quad-port SAS HBAs and two stacks of disk shelves with IOM12 modules is
used for the worksheet examples.
• The worksheet template allows for up to six stacks; you need to add more columns if needed.
• If needed, you can refer to the “SAS cabling rules” section for information about supported configurations,
the controller slot numbering convention, shelf-to-shelf connectivity, and controller-to-shelf connectivity
(including use of port pairs).
• If needed, after you complete the worksheet, you can refer to the “How to read a worksheet to cable
controller-to-stack connections for multipathed connectivity” section.
Step 1. In the boxes above the gray boxes, list all SAS A ports on your system, and then all SAS C ports on
your system in sequence of slots (0,1, 2, 3, and so on).
Example
For example: 1a, 2a, 1c, 2c
Step 2. In the gray boxes, list all SAS B ports on your system, and then all SAS D ports on your system in
sequence of slots (0,1, 2, 3 and so on).
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