Connecting SAS cables to the Lenovo Storage V7000 Gen1 expansion enclosures

Connect SAS cables to the Lenovo Storage V7000 Gen1 expansion enclosures.

This task applies if you are installing one or more expansion enclosures.

Be aware of the following guidelines when you attach the cables to the SAS ports. Figure 3 shows the internal cabling connections between the control enclosure and the expansion enclosures.

No more than five expansion enclosures can be chained to port 1 (below the control enclosure). The connecting sequence from port 1 of the node canister is called chain 1.
No more than four expansion enclosures can be chained to port 2 (above the control enclosure). The connecting sequence from port 2 of the node canister is called chain 2.
Do not directly connect ports on canisters above the control enclosure with ports on those canisters below the control enclosure.
Attach cables serially between enclosures; do not skip an enclosure.
The last enclosure in a chain must not have cables in port 2 of canister 1 and port 2 of canister 2.
Ensure that cables are installed in an orderly way to reduce the risk of cable damage when replaceable units are removed or inserted.
Arrange your cables to provide access to the following components:
- USB ports. USB port access is required when you use a USB flash drive to configure the system.
- The enclosures themselves. Access is required to the hardware for servicing and for safely removing and replacing components by two or more people.
Ensure that each SAS cable is fully inserted. A click is heard when the cable is successfully inserted.
Note: If you make a mistake during cabling and must unplug a SAS cable, pull the blue tag to release the cable.

Review Table 1 and the following figures before you attach the SAS cables.

Table 1. Cabling guide
From:	To:
`1` Port 1 of upper canister, control enclosure	`2` Port 1 of upper canister, expansion enclosure 1
`3` Port 1 of lower canister, control enclosure	`4` Port 1 of lower canister, expansion enclosure 1
`5` Port 2 of upper canister, control enclosure	`6` Port 1 of upper canister, expansion enclosure 2
`7` Port 2 of lower canister, control enclosure	`8` Port 1 of lower canister, expansion enclosure 2
`9` Port 2 of upper canister, expansion enclosure 1	`10` Port 1 of upper canister, expansion enclosure 3
`11` Port 2 of lower canister, expansion enclosure 1	`12` Port 1 of lower canister, expansion enclosure 3

Attach the SAS cables from the control enclosure to the first expansion enclosure as shown in Figure 1. Remove the protective end covers, if necessary. The first expansion enclosure is below the control enclosure.
Figure 1. Attaching an expansion enclosure to the control enclosure
1. Port 1 1 of the upper canister, control enclosure, attaches to Port 1 2 of the upper canister, expansion enclosure 1.
2. Port 1 3 of the lower canister, control enclosure, attaches to Port 1 4 of the lower canister, expansion enclosure 1. The port locations on the lower canister are inverted from the port locations on the upper canister. Port 1 on the lower canister is opposite port 1 on the upper canister.
  Note: The connecting sequence from port 1 of the node canister is called chain 1.
Attach the SAS cables from the control enclosure to the second expansion enclosure as shown in Figure 2. The second expansion enclosure is above the control enclosure.
Figure 2. Adding a second expansion enclosure
1. Port 2 5 of the upper canister, control enclosure, attaches to Port 1 6 of the upper canister, expansion enclosure 2.
2. Port 2 7 of the lower canister, control enclosure, attaches to Port 1 8 of the lower canister, expansion enclosure 2. The port locations on the lower canister are inverted from the port locations on the upper canister. Port 1 on the lower canister is opposite port 1 on the upper canister.
  Note: The connecting sequence from port 2 of the node canister is called chain 2.
Attach the SAS cables from the first expansion enclosure to the third expansion enclosure. See Figure 3.
Figure 3. Attaching SAS cables to the enclosures
1. Port 2 9 of the upper canister, expansion enclosure 1, attaches to Port 1 10 of the upper canister, expansion enclosure 3.
2. Port 2 11 of the lower canister, expansion enclosure 1, attaches to Port 1 12 of the lower canister, expansion enclosure 3.
Attach SAS cables for more expansion enclosures. You can add up to nine expansion enclosures. You add a fourth expansion enclosure at 13 and 14 on expansion enclosure 2.
1. Add the enclosures alternately to chain 1, and then chain 2.
2. Use port 2 on the canisters that are already connected to attach to port 1 on the canisters of the enclosures that you want to add.
3. Connect the SAS cables from canister 1 to canister 1.
4. Connect the SAS cables from canister 2 to canister 2.
Verify your cabling.