Complete this task to connect expansion enclosures for the DS6000™.
The recommended sequence for adding up to seven expansion enclosures is as follows:
- Connect the first and second enclosures on Loop 1.
- Connect the third enclosure on Loop 0.
- Alternate each additional expansion enclosure between Loop 1 and Loop 0, starting with Loop 1.
For example, the first two expansion enclosures are on Loop 1, the third expansion enclosure is on Loop 0, and so on. You can connect up to four expansion enclosures on Loop 1 and up to three on Loop 0, for a total of seven expansion enclosures.
| Expansion enclosure | Loop |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 0 |
Figure 1 provides a logical view of the loop configuration for attached expansion enclosures.
Figure 2 shows a recommended rack configuration for a server enclosure, management console (MC), and seven expansion enclosures (labeled EXP) on Loop 1 and Loop 0. The server enclosure is located in the middle of the rack, with the management console immediately above it. The expansion enclosures for Loop 1 are installed above the management console, in descending order from the top down, with expansion enclosure 6 at the top of the rack and expansion enclosure 1 immediately above the management console. The expansion enclosures for Loop 0 are installed below the server enclosure, in ascending order, with expansion enclosure 3 immediately below the server enclosure and expansion enclosure 7 at the bottom of the rack.
Attention: Ensure that you have planned the layout and have installed all your expansion enclosures before you start connecting them to their appropriate loops. Because Loop 1 and Loop 0 have different physical cabling connections, you must follow each step exactly.
- Connect the expansion enclosures to a server enclosure
on Loop 1, using the following tables.
The following tables provide a step-by-step outline that you can use to properly connect your expansion enclosures to the server enclosure. Table 1 provides an outline of the initial connection between the server enclosure and expansion enclosure 1 on Loop 1. Table 2 outlines a single connection between two expansion enclosures on Loop 1, such as the connection that occurs between expansion enclosures 1 and 2, expansion enclosures 2 and 4, or expansion enclosures 4 and 6. You must complete the connection in Table 2 for each expansion enclosure after expansion enclosure 1. Each row in a table requires a single fiber-optic cable and represents a single physical connection between two ports.
Table 1. Loop 1 initial connection between the server enclosure and expansion enclosure 1 From On To On left Disk Contrl OUT port upper server enclosure processor card left IN port upper expansion enclosure processor card right Disk Contrl OUT port upper server enclosure processor card right IN port lower expansion enclosure processor card left Disk Contrl OUT port lower server enclosure processor card left IN port lower expansion enclosure processor card right Disk Contrl OUT port lower server enclosure processor card right IN port upper expansion enclosure processor card Table 2. Loop 1 connection between expansion enclosure 1 and expansion enclosure 2 and subsequent connections between expansion enclosures 2, 4, and 6 From On To On left OUT port upper expansion enclosure processor card of the first expansion enclosure left IN port upper expansion enclosure processor card of the second expansion enclosure right OUT port upper expansion enclosure processor card of the first expansion enclosure right IN port upper expansion enclosure processor card of the second expansion enclosure left OUT port lower expansion enclosure processor card of the first expansion enclosure left IN port lower expansion enclosure processor card of the second expansion enclosure right OUT port lower expansion enclosure processor card of the first expansion enclosure right IN port lower expansion enclosure processor card of the second expansion enclosure Attention: Expansion enclosures that are not cabled correctly can cause problems at initialization and can cause unexpected error log entries. Check the following figure carefully when you are connecting the cables.
- Connect the expansion enclosures to a server enclosure
on Loop 0, using the following tables.
The following tables provide a step-by-step outline that you can use to properly connect your expansion enclosures to the server enclosure. Table 3 provides an outline of the initial connection between the server enclosure and expansion enclosure 3 on Loop 0. Table 4 outlines a single connection between two expansion enclosures on Loop 0, such as the connection that occurs between expansion enclosures 3 and 5 or expansion enclosures 5 and 7. You must complete the connection in Table 4 for each expansion enclosure after expansion enclosure 3. Each row in a table requires a single fiber-optic cable and represents a single physical connection between two ports.
Table 3. Loop 0 initial connection between the server enclosure and expansion enclosure 3 From On To On left Disk Exp OUT port upper server enclosure processor card left IN port upper expansion enclosure processor card right Disk Exp OUT port upper server enclosure processor card right IN port upper expansion enclosure processor card left Disk Exp OUT port lower server enclosure processor card left IN port lower expansion enclosure processor card right Disk Exp OUT port lower server enclosure processor card right IN port lower expansion enclosure processor card Table 4. Loop 0 connection between expansion enclosure 3 and expansion enclosure 5 and subsequent connections between expansion enclosures 5 and 7 From On To On left OUT port upper expansion enclosure processor card of the first expansion enclosure left IN port upper expansion enclosure processor card of the second expansion enclosure right OUT port upper expansion enclosure processor card of the first expansion enclosure right IN port upper expansion enclosure processor card of the second expansion enclosure left OUT port lower expansion enclosure processor card of the first expansion enclosure left IN port lower expansion enclosure processor card of the second expansion enclosure right OUT port lower expansion enclosure processor card of the first expansion enclosure right IN port lower expansion enclosure processor card of the second expansion enclosure Attention: Expansion enclosures that are not cabled correctly can cause problems at initialization and cause unexpected error log entries. Check the following figure carefully when you are connecting the cables.
