Adaptec 51645 User Guide - Page 39
Connecting to a System Backplane, Connecting External, Devices
UPC - 760884155622
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Chapter 5: Installing the Controller and Disk Drives ● 39 2 Use internal SAS or mini-SAS cables to attach the disk drives to the controller, as shown in the following example. internal x4 mini-SAS connectors SAS/SATA disk drives mini-SAS to SATA fan-out cable Single-port connector Note: SAS fan-out cables are also available with an additional sideband (SFF-8448) cable that caries SGPIO signals for enclosure management. This additional sideband cable is not used with direct-attached disk drives. 3 When all internal disk drives have been installed and attached to the controller, close your computer cabinet, reattach the power cord, then continue with Connecting External Devices on page 42. Connecting to a System Backplane In a backplane connection, disk drives and SAS cards are attached to and communicate with each other through a system backplane. The number of disk drives is limited to the number of slots available on the backplane. Some backplanes have embedded SAS expanders and can support up to 128 end devices. (For more information about backplane and expander connections, see page 71.) 1 Connect one or more internal SAS or SATA disk drives to the backplane. (Refer to your system's documentation for more information.) 2 Use an internal SAS cable to connect the controller to the backplane, as shown in the examples on page 40.