IBM Storwize V5000 Gen 2 Series, Quick Installation Manual

Page: 50 / 178

Note: Storwize V5010 and Storwize V5020 control enclosures can support up to 10 additional
expansion enclosures on one chain. Storwize V5030 systems can support two chains. Each chain can
contain up to 10 additional expansion closures.
4. If two Storwize V5030 and Storwize V5030F control enclosures are installed, repeat this cabling
procedure on the second control enclosure and its expansion enclosures.
SAS cabling guidelines
When connecting SAS cables between 2U expansion enclosures, you must follow a list of guidelines to
ensure that your configuration is valid.
Orienting the connector
When inserting SAS cables, make sure the connector (Figure 21 on page 24) is oriented correctly.
• The orientation of the connector must match the orientation of the port before you push the connector
into the port. The cable connector and socket are keyed, and it is important that you have proper
alignment of the keys when the cable is inserted.
• The blue pull tab must be below the connector.
• Insert the connector gently until it clicks into place. If you feel resistance, the connector is probably
oriented the wrong way. Do not force it.
• When inserted correctly, the connector can only be removed by pulling the tab.
• When both ends of a SAS cable are inserted correctly, the green link LEDs next to the connected SAS
ports are lit.
Figure 21. SAS cable connectors
Connecting SAS cables
Be aware of the following guidelines when you attach the cables to the SAS ports in 2U expansion
enclosures.
• No more than 10 expansion enclosures can be chained to SAS port 1 of a node canister. The expansion
enclosures in this chain should be installed below the control enclosure.
• For Storwize V5030 and Storwize V5030F systems only:
– No more than 10 expansion enclosures can be chained to SAS port 2 of a node canister. The
expansion enclosures in this chain should be installed above the control enclosure.
– When an odd number of expansions is attached to a control enclosure, ensure the SAS expansion
chain attached to SAS port 1 of the canisters contains one more expansion enclosure than the SAS
expansion chain attached to SAS port 2 of the canister
• No cable can be connected between a port on a left canister and a port on a right canister.
• A cable must not be connected between ports in the same enclosure.
24 Storwize V5000 Gen2: Quick Installation Guide