C H A P T E R 3

Installing Trays

Use the procedures in this chapter to install controller and expansion trays in an industry-standard cabinet. The number of trays you need to install depends on your overall storage requirements. You can install a maximum of four trays, one controller tray and up to three expansion trays for each array.

- Preparing for Installation

- Installing Adjustable Support Rails

- Installing Controller and Expansion Trays

- Connecting the Controller Tray to Expansion Trays

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Preparing for Installation

Prerequisite: Refer to the Sun Storage 2500-M2 Site Preparation Guide for important considerations about cabinet installation.

Check the following cabinet requirements:

1. Cabinet is in the final location.

2. Cabinet installation site meets the clearance requirements.

- Front clearance: 30 in. (76 cm)

- Back clearance: 24 in. (61 cm)

3. Lower the feet on the cabinet, if required, to keep it from moving.

4. Combined power requirements of the trays do not exceed the power capacity of your cabinet.

Note - The power supplies meet standard voltage requirements for both domestic and worldwide operation.

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Installing Adjustable Support Rails

This procedure describes how to install adjustable support rails for Oracle’s Sun Storage 2500-M2 array hardware.

The adjustable support rail kit includes these parts:

- Eight large screws for mounting the support rails and the front of the tray to the cabinet

- Eight washers for the large screws

- Eight large spacers for cabinets with square holes (Note: Small spacers for round holes come pre-installed in the rails)

- Two small screws for securing the rear of the tray to the support rails

### Preparing to Install the Support Rails in the Cabinet

FIGURE 3-1 shows how the support rails are positioned inside the cabinet. Note the following clearance requirements:

- If you are installing the support rails above an existing tray, position the rails directly above the tray.

- If you are installing the support rails below an existing tray, allow 3.5 in. (8.8 cm) clearance for 2U controller tray or expansion tray units.

FIGURE 3-1 Positioning the Support Rails in the Cabinet--Front View

1 | Support rail | 3 | Clearance below the existing tray 3.5 in. (8.8 cm)
2 | Existing tray | 4 | Industry standard cabinet

### Attaching the Support Rails to the Cabinet

FIGURE 3-2 Attaching the Support Rails to the Cabinet

1 | Cabinet mounting holes | 3 | Support rails
2 | Adjustment screws for locking the support rail length | 4 | Clip for securing the rear of the tray

1. If desired, use alignment spacers on the flanges of the mounting rails.

The alignment spacers are designed to fit into the mounting holes in the cabinet and help position and hold the mounting rails. Each support rail comes with two spacers in the front bracket and two spacers in the rear bracket.

- If the cabinet has round holes, use the pre-installed small spacers on the front and rear of the support rail.

- If the cabinet has square holes, replace the small spacers on the front and rear of the support rail with the large spacers that come with the rail kit.

2. Be sure the adjustment screws on the support rail are loose so you can extend or contract the support rail as needed.

3. Place the support rail inside the cabinet and extend the support rail until its flanges touch the inside of the cabinet.

4. Insert one large screw through the front of the cabinet and screw into the upper captured nut in the support rail. If needed, add a washer between the screw and the cabinet rail. Tighten the screw.

Note - Do not insert a screw into the front lower captured nut at this time. This captured nut is used for tray installation.

5. Insert two large screws through the rear of the cabinet and screw into the upper and lower captured nuts in the rear flange in the support rail. If needed, add a washer between each screw and the cabinet rail. Tighten the screws.

6. Tighten the adjustment screws on the support rail.

7. Repeat Step 1 through Step 6 for the second support rail.

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Installing Controller and Expansion Trays

When installing trays, distribute tray weight evenly within the cabinet. One approach is to install the controller tray in the middle portion of the cabinet while allowing room for expansion trays to be placed above and below the controller tray.

| Caution - Risk of bodily injury--If the bottom half of the cabinet is empty, do not install components in the top half of the cabinet. If the top half of the cabinet is too heavy for the bottom half, the cabinet might fall and cause bodily injury. Always install a component in the lowest available position in the cabinet.

1. Install a pair of mounting rails in the cabinet for each controller tray and expansion tray (see Installing Adjustable Support Rails).

| Caution - Possible hardware damage--To prevent electrostatic discharge damage to the tray, use proper antistatic protection when handling tray components.

2. Using two people, carefully lift and rest the tray on the bottom left and right rails.

| Caution - Risk of bodily injury--A fully loaded controller tray weighs approximately 60 lbs (27 kg). Two people are required to safely lift the component.

3. Carefully slide the tray into the cabinet until the front mounting flanges on the tray touch the vertical face of the cabinet and the rear edges of the tray fit into the clips on the support rails. The tray is correctly aligned when these conditions are met:

- The middle mounting holes on the front flanges of the tray align with the mounting holes on the front of the mounting rails.

- The rear edge of the tray sheet metal fits into the clip on the mounting rail.

- The holes in the tray sheet metal for the rear hold-down screws align with the captured nuts in the side of the mounting rails.

4. Secure the front of the tray to the cabinet by inserting a screw through the center hole in each front mounting flange. If you used a washer for the top mounting rail screw, insert a washer between the mounting flange and the cabinet rail. Tighten the screws.

5. Secure the rear side of the tray to each mounting rail by inserting one screw through the side sheet metal of the tray into the captured nut on the mounting rail. Tighten the screw.

6. Replace the end caps that cover the mounting flanges on the front of the tray.

7. Verify that the tray power switches and cabinet circuit breakers are turned off.

8. Connect each tray power supply to a separate power source in the cabinet.

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Connecting the Controller Tray to Expansion Trays

- Each expansion tray can contain a maximum of twelve drives.

- The maximum number of drive slots in the storage array is 48.

- The IOMs in an expansion tray contain two sets of In ports and one set of Out ports.

- Each controller module has one dual-ported SAS expansion port to connect to the expansion trays.

- To maintain data access in the event of the failure of a controller, an IOM, or a drive channel, you must connect an expansion tray or a string of expansion trays to both drive channels on a redundant path pair.

FIGURE 3-3 Drive Channel Ports on the Controller Tray

1 | Controller module | 2 | SAS expansion port

FIGURE 3-4 Expansion Tray Ports--Rear View

1 | IOM A | 4 | SAS expansion port (Out)
2 | SAS port 1 (In) | 5 | IOM B
3 | SAS port 2 (In) |  |

### Drive Cabling Configurations

Use the following recommended cabling diagrams for one controller tray and one, two, or three expansion trays.

FIGURE 3-5 Controller Tray Above the Expansion Tray

[ D ]

FIGURE 3-6 Controller Tray Between Two Expansion Trays

[ D ]

FIGURE 3-7 Controller Tray with Three Expansion Trays

### Connecting Expansion Trays

1. Use the following table to determine the number of SAS cables that you need:

TABLE 3-1 Expansion Tray Cabling
Number of Expansion Trays | Number of Cables Required
--- | ---
1 | 2
2 | 4
3 | 6

2. If there is a black, plastic plug in the SAS expansion port on the controller, remove it.

3. Insert one end of the cable into the SAS expansion port on the controller into slot A of the controller tray.

4. Insert the other end of the cable into the port with an up arrow on the IOM into slot A of the expansion tray.

5. Are you adding more expansion trays?

- Yes - Go to Step 6.

- No - Go to Step 9.

Note - Each IOM in an expansion tray has three SAS expansion ports: two on the left-center of the IOM and one on the upper-right side. When connecting from an IOM in one expansion tray to an IOM in another expansion tray, connect the port on the upper-right to one of the ports on the left-center. The following figure shows these arrows on an IOM. If the cable is connected either between the two left-center IOM ports or between two upper-right IOM ports, communication between the two expansion trays is lost.

Note - It does not matter which of the two left-center IOM ports you use to connect to the SAS expansion port on the far-right side.

FIGURE 3-8 Connecting a Cable from One IOM to a Second IOM

6. In the IOM of the first expansion tray, insert one end of the cable into the port on the far-right side.

7. In the IOM of the next expansion tray, insert the other end of the cable into one of the ports in the left-center of the IOM.

8. Repeat Step 6 and Step 7 for each expansion tray that you add to the storage array.

9. To each end of the cables, attach a label with this information:

- Controller ID (for example, controller A)

- IOM ID (for example, IOM A)

- IOM port (In or Out)

- Expansion tray ID

For example, if you are connecting controller A to the In port on IOM A in expansion tray 1, the label on the controller end of the cable will have this information:

    CtA-Dch1, Dm1-IOM_A (left), In - Controller End

The label on the expansion tray end of the cable will have this information:

    Dm1-IOM_A (left), In, CtrlA

10. Repeat Step 2 through Step 9 for the controller in slot B in the controller tray.

Note - To connect cables for maximum redundancy, the cables attaching controller B must be connected to the expansion trays in the opposite tray order as for controller A. That is, the last expansion tray in the chain from controller A must be the first expansion tray in the chain from controller B.

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