Adaptec 412R User Guide - Page 140
Hubs Enabled, active-active storage enclosure without the cost of external
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DuraStor 412R/6320SS/7320SS Installation and User's Guide Hubs Enabled Figure B-7 shows hosts in a single loop configuration with the internal hubs enabled. The internal hubs eliminate the need for an external hub. It allows one or two hosts to be connected to the active-active storage enclosure without the cost of external hardware other than cables. CH 1 CH 2 CH 0 CH 3 Disk I/O Connectors T SEP T SEP SAF-TE Disk I/O T T Disk I/O Drives 7 - 12 Drives 1 - 6 T= Location of internal termination T Disk CH2 T Disk T CH0 Disk T CH1 CH3 Controller 2 Disk FC2 LUN 2 Active FC1 LUN 2 Passive RAID Controller Disk CH3 Controller 1 Disk CH0 Disk CH2 Disk CH1 FC2 LUN 1 Passive FC1 LUN 1 Active RAID Controller HUB HUB HOST I/O P3 P4 Host I/O Connectors P2 Jumper Cable P1 Host Link 2 Host Link 1 FC HBA Host 2 FC HBA Host 1 Figure B-7 Single Loop Configuration, Hubs Enabled B-10