NonStop S-Series Planning and Configuration Guide (G06.29+)

Enclosure Arrangements and Cable Connections
HP NonStop S-Series Planning and Configuration Guide—523303-021
7-4
Choosing ServerNet Cable Lengths
Choosing ServerNet Cable Lengths
The following information about ServerNet cable lengths applies to ECL and serial-
copper ServerNet cables. The lengths of fiber-optic ServerNet cables available from
HP is limited; refer to Appendix A, Part Numbers.
The lengths of the ServerNet cables you need depends on the arrangement of the
enclosures you want to connect.
Obtain the following information about the enclosures and how cables will be laid.
•
The arrangement of the enclosures.
•
The amount of cable slack that is to be allowed beneath the raised floor.
•
Whether the cable will be part of a bundle of cables at either end.
If you are bundling together a large group of cables, you will need extra slack in each
cable in that group. How much slack you need depends on the size of that group of
cables. For more information, contact your service provider.
Methods of Estimating Cable Lengths
•
Use the lookup tables SEB-to-SEB Connections in Same Row on page B-4 and
SEB-to-IOMF CRU Connections in Same Row on page B-5 and the illustration
Dimensions Within an Enclosure (Service Side) on page B-9.
•
Measure from a scale drawing of your system.
•
Measure cables directly from another system, if available.
•
Lay out the system dimensions on the floor and measure distances directly.
Avoid describing the same ServerNet connection twice. Refer to the following tables,
which shade the second occurrence of all duplicate listings in gray:
•
Tetra 8 Cabling Table, Processor Enclosures on page 5-10
•
Tetra 8 Cabling Table, I/O Enclosures on page 5-11
•
Tetra 16 Cabling Table, Processor Enclosures on page 5-15
•
Tetra 16 Cabling Table, I/O Enclosures on page 5-16
For Information About ... Refer to ... Page
Choosing cable lengths for two
enclosures in the same row
Cable slack is 6 inches (15.25 cm) for a
single cable in any enclosure.
7-5
Choosing cable lengths for two
enclosures in different rows
Different-Row Connections 7-9
An example of choosing cable
lengths
Appendix D, Case Study: ServerNet Cable Lengths