Procedure: Finding The Status Of Storwize V7000 Gen2 Sas Connections - IBM Storwize V7000 Unified Problem Determination Manual

4. If the status is obtained using the USB flash drive, review all the node errors
that are reported.
5. Replace the Ethernet cable.
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"
on page 256.
Procedure
Determine the state of the SAS ports by using one of the following methods:
v 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.
v Determine the meaning of the LEDs of the SAS ports, as described in
"Expansion canister ports and indicators" on page 31.
– 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.
v 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" on page 247.
2. Replace the SAS cable, as described in "Replacing a Storwize V7000 Gen2
expansion enclosure attachment SAS cable" on page 329.
3. Replace the expansion canister at one end of the connection, as described in
"Replacing a Storwize V7000 Gen2 expansion enclosure" on page 344.
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" on page 295.
Chapter 5. Control enclosure
269