Procedure: Finding the status of Storwize V7000 Gen2 SAS connections

Find the status of the SAS connections between Storwize® V7000 Gen2 canisters in different enclosures.

About this task

Ensure that the Storwize V7000 Unified machine code is active on the node before you begin this procedure. To determine if the machine code is active, see Procedure: Understanding the Storwize V7000 Gen2 system status from the LEDs.

Procedure

Determine the state of the SAS ports by using one of the following methods:

Go to Monitoring > System in the management GUI. Use the dynamic image to display the rear of the system. Hover over each of the SAS ports on the canisters to display the status. A port with offline status indicates that its link is not connected.
- It is normal for port 2 of the canisters in the expansion enclosure at the end of a SAS chain to be offline.
- If no expansion enclosures are connected to a system, it is normal for port 4 of each canister in the control enclosure to be offline.
Attention: The system can identify some SAS cabling errors and log an event to alert you to the error. Go to the Monitoring > Events page of the management GUI and identify alerts concerning hardware errors and SAS cabling errors. Run fix procedures in the recommended order.
Determine the meaning of the LEDs of the SAS ports, as described in Expansion canister ports and indicators.
- If the link LED is off, the link is not connected.
- If the fault LED is on, the link is partially operational, with reduced performance. Consider the state of any other link between the two enclosures before servicing this link.
To connect a link that is not connected, complete the following actions while checking the link status after each step until the link is connected:
1. Ensure that both ends of each SAS cable are correctly inserted into their correct ports, as described in Problem: Storwize V7000 Gen2 SAS cabling not valid.
2. Replace the SAS cable, as described in Replacing a Storwize V7000 Gen2 expansion enclosure attachment SAS cable.
3. Replace the expansion canister at one end of the connection, as described in Replacing a Storwize V7000 Gen2 expansion enclosure.
4. Replace the canister at the other end of the connection. If it is a node canister, see Replacing a Storwize V7000 Gen2 node canister.