This topic provides information to be aware of if you receive
errors that indicate the SAS cabling is not valid.
Check the following items:
- No more than 10 expansion enclosures can be chained to port 1
(below the control enclosure). The connecting sequence from SAS port
1 of the node canister is called chain 1.
- No more than 10 expansion enclosures can be chained to port 2
(above the control enclosure). The connecting sequence from SAS port
2 of the node canister is called chain 2.
- Do not connect a SAS cable between a port on a left canister and
a port on a right canister.
- In any enclosure, the same ports must be used on both canisters.
- Do not connect a SAS cable between ports in the same enclosure.
- In each enclosure, where a cable connects from SAS port 1 of the
left canister to another enclosure, a cable must also connect from
SAS port 1 of the right canister to the other enclosure. Similarly,
where a cable connects from SAS port 2 of the left canister to another
enclosure, a cable must also connect from SAS port 2 of the right
canister to the other enclosure.
- For cables connected between expansion enclosures, one end is
connected to port 1 while the other end is connected to port 2.
- For cables that are connected between a control enclosure and
expansion enclosures, port 1 must be used on the expansion enclosures.
- The last enclosure in a chain must not have cables in port 2 of
the left canister, nor port 2 of the right canister.
- Ensure that each SAS cable is fully inserted.