Adaptec 412R User Guide - Page 121
Theory of Controller Operation, Active-Active Dual-Port Mode with Hubs Enabled and Both
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Theory of Controller Operation CH 1 CH 2 CH 0 CH 3 Controller FC Host Ports HOST I/O RAID Controller P1 FC1 Active Disk CH1 HUB P2 HUB FC2 Active Disk CH2 Disk CH0 P4 Disk CH3 Controller 1 P3 ACTIVE RAID Controller Host I/O Connectors FC1 Active Disk T CH1 Drives 7 - 12 Drives 1 - 6 Drive I/O Connectors T SEP T SEP SAF-TE Disk I/O T T I/O Card FC2 Active Disk CH2 T Disk T CH0 T= Location of internal termination Disk CH3 Controller 2 ACTIVE T Controller Disk Ports Figure A-14 Active-Active Dual-Port Mode with Hubs Enabled and Both Controllers Active CH 1 CH 2 CH 0 CH 3 Controller FC Host Ports HOST I/O RAID Controller P1 FC1 Active (CTRL 1) Disk CH1 HUB P2 HUB FC2 Active (CTRL 2) Disk CH2 Disk CH0 P4 Disk CH3 Controller 1 P3 ACTIVE (FAILED OVER) RAID Controller Host I/O Connectors FC1 Inactive Disk T CH1 Drives 7 - 12 Drives 1 - 6 Drive I/O Connectors T SEP T SEP SAF-TE Disk I/O T T Disk I/O FC2 Inactive Disk CH2 T Disk T CH0 T= Location of internal termination Disk CH3 Controller 2 FAILED T Controller Disk Ports Figure A-15 Active-Active Dual-Port with Hubs Enabled and Controller 2 Failed A-19