This procedure explains how to find the status of the SAS
connections between canisters in different enclosures.
Ensure that thesystem machine code is active on the node before you begin this procedure. To
determine if the machine code is active, refer to Procedure: Understanding the system status LEDs.
Determine the state of the SAS ports by using one
of the following methods:
- Go to in the management GUI. Use the
dynamic image to display the enclosure. Right-click the enclosure and select to check the status of the SAS port of each canister. 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.
- It is normal for
SAS expansion ports to go offline if not connected to any expansions.
Attention: The system can identify some SAS cabling errors and log an event to alert you
to the error. Go to the page of the management GUI and identify alerts concerning hardware errors and SAS
cabling errors. Run fix procedures in the recommended order.
- Examine the LEDs of the SAS ports and refer to Expansion canister ports and indicators
to understand their meaning.
- 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.
- If a link is not connected, perform the following actions
and check the link status each time until it is corrected or connected:
- Refer to Problem: SAS cabling not valid to
ensure that both ends of each SAS cable are correctly inserted into
their correct ports.
- Replace the SAS cable, following steps in Replacing an expansion enclosure attachment SAS cable.
- Replace the expansion canister at one end of the connection
by following the steps in Replacing an expansion canister.
- Replace the canister at the other end of the connection.
If it is a node canister, refer to Replacing a node canister.