Adaptec 412R User Guide - Page 22

Setting Up Your Storage Subsystem CH 1 CH 2 Note: In these logical view diagrams, the numbers 1 to 12 represent disk drive slots and are used to indicate which drives are connected to which channel. They should not be confused with the disk drive SCSI IDs. Those IDs are predetermined by the SCSI disk I/O card switch settings. Single Bus Module Drives 7 - 12 SAF-TE Termination SEP Termination Drives 1 - 6 SEP Figure 2-6 Logical Diagram - Drive Connectivity, Single-Bus Mode In dual-bus mode, the channel 1 connector on the SAF-TE disk I/O card provides access to drives 7 through 12 and the channel 2 connector provides access to drives 1 through 6. Figure 2-7 shows the drive connectivity of the Dual-Bus Mode. Termination Drives 7 - 12 SAF-TE Termination SEP CH 1 CH 2 Termination Termination Drives 1 - 6 SEP Figure 2-7 Logical Diagram - Drive Connectivity, Dual-Bus Mode To set up a basic 12-disk drive configuration: 1 Power OFF the storage subsystem. See Turning the Power Off on page 2-7. 2 Remove the SAF-TE disk I/O card installed in the enclosure. See Replacing an I/O Card on page 5-21 for detailed instructions. 2-9