Intel RES2SV240 manual Route SAS cables carefully

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Figure 3. Installing the Expander Card onto a Customized Chassis Wall

6.Connect the SAS/SATA cables from the backplane (or hard drives) to the expander card, and from the expander card to a RAID module or RAID controller (see Figure 4, which takes 6-drive and 4-drive non-expander backplanes in Intel's pedestal chassis as an example for cabling). For information regarding connecting the recommended Right-angle end or Vertical end of the SAS/SATA cable to the SAS connectors of the controller, see your server/workstation board or chassis documentation. Make sure the cables are properly connected to the controller.

Note: System throughput problems can occur if non-standard SAS cables are used. To minimize the potential for problems:

✧Use cables no longer than ten meters for SAS and one meter for SATA. It is better to use the shortest possible cables. The cable length should be reduced by about one foot (.33 meters) if using a backplane.

✧You may connect one device per SATA/SAS cable either as a device or as an expander.

✧Route SAS cables carefully.

✧Use only “straight” SAS cables, not “cross-over” SAS cables.

8 Intel® RAID Expander Card RES2SV240 Hardware User’s Guide