Connecting MediaDirectors and MediaStores using SAS
IMPORTANT:
The MediaDirector models 2252B and 2251B require a different SAS cable
than earlier MediaDirector models. To make sure you have the correct SAS cable, contact
your Harmonic sales representative.
Please note the following about cabling the MediaDirectors and the MediaStores:
• When cabling the SAS connections between MediaStores, be sure to connect primary I/O modules
(top module) to primary I/O modules and secondary I/O modules (bottom modules) to secondary I/O
modules.
• Do not twist SAS cables or bundle them with power cables—doing so will affect performance.
• Make sure there is no lateral or vertical strain on the SAS connectors when connected to devices, as
contact problems may not appear immediately.
Figure 2-17: MediaDirector 2252B and MediaStore connection with SAS
NOTE:
For the following procedure, refer to the above diagram. P=Primary module and
S=Secondary module.
Using SAS cables, make the following connections:
1. MCP-1: A to MS-1 P: C
2. MS-1 P: B to MS-2 P: C
3. MS-2 P: B to MS-3 P: C
4. MS-3 P: B to MS-4 P: C
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Spectrum System 8.4 Installation Guide
