2 confirming sas connections – Avago Technologies Syncro 9361-8i User Manual
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Avago Technologies
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Syncro CS 9361-8i and Syncro CS 9380-8e Solution User Guide
October 2014
Chapter 4: Troubleshooting
Confirming SAS Connections
4.2
Confirming SAS Connections
The high availability functionality of HA-DAS is based on redundant SAS data paths between the clustered nodes and
the disk drives. If all of the components in the SAS data path are configured and connected properly, each HA-DAS
controller has two SAS addresses for every drive, when viewed from the HA-DAS controllers.
This section explains how to use three tools (StorCLI, Ctrl-R, and MSM) to confirm the correctness of the SAS data
paths.
4.2.1
Using Crtl-R to View Connections for Controllers, Expanders, and Drives
Use the PD Mgmt tab in Ctrl-R to confirm the connections between the controllers and expanders in the Syncro CS
system, as shown in the following figure. If both expanders are running, the view in Ctrl-R from one of the nodes
includes the other HA-DAS RAID controller, the two expanders, and any drives.
Figure 52 Ctrl-R Physical View
If the other node is powered off, the other RAID controller does not appear in Ctrl-R. Devices can appear and
disappear while the system is running, as connections are changed. Use the Ctrl-R rescan feature to rediscover the
devices and topology after a connection change.