IBM Storwize V7000 - Node error code overview; Critical errors

SAS cabling guidelines
When connecting SAS cables between 2U expansion enclosures, you must follow a list of guidelines to
ensure that your conguration is valid.
Orienting the connector
When inserting SAS cables, make sure the connector (Figure 141 on page 127) 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.
Note: On Storwize V7000 2076-724 systems, node canister 1 is inverted from node canister 2. Because
the orientation of the ports differ, you must ensure that the orientation of the SAS cables is also correct
for each canister.
• For ports in the upper canister (canister 1), the blue pull tab must be above the connector. For ports in
the lower canister (canister 2), 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 141. SAS cable connectors
Guidelines
Be aware of the following guidelines when you connect a Storwize V7000 2076-724 control enclosure to
the SAS ports in 2U and 5U expansion enclosures.
• Storwize V7000 2076-724 systems support 4-port SAS interface adapters. However, only ports 1 and 3
are used for SAS connections, as Figure 142 on page 128 shows.
• The SAS interface adapter should already be installed in PCIe slot 3 of each node canister when you
unpack the control enclosure.
• No more than ten 2U 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, as shown in Figure
142 on page 128.
• No more than ten 2U expansion enclosures can be chained to SAS port 3 of a node canister. The
expansion enclosures in this chain should be installed above the control enclosure, as shown in Figure
142 on page 128.
• No cable can be connected between a port on a left expansion canister and a port on a right expansion
canister.
Chapter 2. Installing the system hardware
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