Depending on how you purchased your SGI Onyx4 system, you may need to install one or more G2-bricks or G2N-bricks in a rack. This Appendix describes the process of installing bricks in a rack and removing bricks from a rack.
Observe the following safety measures when you install the system:
Use caution when you remove the system from the shipping crate. Failure to handle the system carefully can result in personal injury or property damage.
Warning: Ensure that the shipping crate is positioned close to its destination before you unpack the crate. Warning: Employ a minimum of two people to lift the brick or bricks off the shipping pallet, to move the brick(s) from one location to another, and to install the brick(s) in a rack. Otherwise, someone could be seriously injured. Do not move the system while it is connected to power.
Warning: Keep fingers and conductive tools away from high-voltage areas. Failure to follow these precautions will result in serious injury or death. The high-voltage areas of the system are indicated with high-voltage warning labels. Ensure that a qualified electrician has properly installed the power receptacles.
Set all circuit breakers to the OFF (O) position before you plug in the system power cord.
Warning: Use the following guidelines to prevent the rack from toppling over. Otherwise, people could be seriously injured and/or equipment could be damaged.
Follow these guidelines to prevent the rack from toppling over:
Make sure that only one brick is extended out of the rack at one time.
Install all equipment in the lowest available position in the rack.
If provided, ensure that the tip tray is bolted to the front of the rack.
This section describes how to rackmount bricks with slide rail assemblies. This section includes the following topics:
Table C-1 specifies the space requirements when rackmounting a G2-brick or a G2N-brick in a 19-inch rack.
Table C-1. G2-brick and G2N-brick Space Requirements
Height | 3.44 inches (8.74 cm) |
Width | 17.06 inches (43.33 cm) |
Depth | 27 inches (68.58 cm) (with bezel) |
Weight | 37.80 lb. (17.18 kg) minimum configuration; |
Required front clearance for brick | 8.25 inches (20.96 cm) |
Required rear clearance for brick | 10 inches (25.40 cm) |
Required side clearance for brick | 6 inches (15.24 cm) (right side) |
Required front clearance for rack | 36 inches (91 cm) |
Required rear clearance for rack | 36 inches (91 cm) |
[a] Weight will vary depending on configuration. | |
Table C-2 lists the hardware that you will use to mount each G2-brick or G2N-brick in a 19-inch rack.
Table C-2. Rackmounting Hardware
Hardware Type | Qty | Usage |
|---|---|---|
Slide rail assembly (includes chassis rail) | 2 | Allows the brick to slide in and out of rack. |
2-inch rear mounting bracket | 2 | Mounts the slide rails to the rear rack rails. |
10-24 x 1/4-inch Phillips screw | 10 | Secures the chassis rails to the brick. |
10-32 x 1/2-inch Phillips screw | 8 | Secures the slide rails to the rack rails. |
10-32 x 1/2-inch Phillips screw | 4 | Secures the slide rails to their mounting brackets. |
10-32 clip nut | 2 | Provides a threaded hole for fastening the brick front panel to the rack rails. |
10-32 x 1/2-inch Phillips screw | 2 | Fastens the brick front panel to the clip nut. |
The slide rail assembly consists of a chassis rail and a slide rail. You need to remove the chassis rail from the slide rail so that you can install a mounting bracket to the slide rail and attach the chassis rail to the brick (see “Preparing the Brick”). To remove the chassis rail from the slide rail, follow these steps:
Remove the two slide rail assemblies and the rear mounting brackets from the shipping container.
Extend each slide rail assembly until the safety latch snaps into place.
Press the safety latch and remove the chassis rail from the slide rail, as shown in Figure C-1.
Place one of the mounting brackets on the back of the slide rail as shown in Figure C-2. Adjust the position of the mounting bracket on the slide rail according to the depth of the rack.
Place a bar nut next to the mounting bracket. Secure the mounting bracket to the slide rail by inserting two 10-32 x 1/2-inch screws through the assembly and into the bar nut as shown in Figure C-2.
Repeat steps 4 and 5 to attach a mounting bracket to the other slide rail.
To attach the chassis rails to the brick, follow these steps:
Place the brick on a flat, stable surface.
Using four 10-24 x 1/4-inch screws, attach one of the chassis rails to the right side of the brick. Ensure that the rail is installed in the correct direction (see Figure C-3).
Caution: Use only the 1/4-inch (0.64 cm) length screws. Longer screws damage internal components in the brick. Using five 10-24 x 1/4-inch screws, attach the second rail to the left side of the brick. Again, ensure that the rail is installed in the correct direction.
The brick requires two units (2U) of space within the rack (one unit is equivalent to 1.75 inches [44.5 cm]). To determine where you should install the slide rails in the rack, you must count mounting holes. Each U contains three mounting holes; therefore, in the 2U of space that the brick occupies, there are six mounting holes. The bottom hole of the 2U space is hole 1. The top mounting hole in the 2U space is hole 6. See Figure C-4.
 | Note: A brick in the rack is identified by the lowest U number that it occupies. For example, in Figure C-4 the brick resides in U5 (the fifth unit within the rack). |
To determine how many mounting holes you must count, use the following formula: 3 x (the lowest U number that the brick will occupy) - 2. For example, when you want to install the brick in locations U9 and U10, count 25 mounting holes (3 x 9 - 2) starting from the bottom of the rack. The 25th hole is the first mounting hole of U9.
To attach the slide rail to the rack, follow these steps:
 | Tip: The slide rails must be level in the rack. To ensure that you install the slide rails correctly, carefully count the mounting holes on all of the rack rails (both front rails and both rear rails). |
Locate eight 10-32 x 1/2-inch Phillips screws, eight shoulder washers, and four bar nuts.
Place one of the bar nuts inside the rack and align it with the second and third holes of the selected 2U of space (see Figure C-5).
Note: The holes in the bar nuts are not centered. The bar nuts need to be placed in such a way that the holes are closest to the inside edge of the rack rails. See Figure C-5. Insert two screws with shoulder washers through the rack rail to hold the bar nut in place. The screws should not be tightened at this point.
Repeat steps 2 and 3 to install the remaining three bar nuts on the other three rack rails (front and rear of rack).
Insert the front and rear brackets of one of the slide rails between the rack rails and the bar nuts, as shown in Figure C-6.
Tighten the screws on the front- and rear-end of the rails. Do not tighten firmly at this point, because all screws will be firmly tightened once the brick is installed in the rack.
Repeat steps 5 and 6 to attach the second slide rail to the other side of the rack.
Clip nuts secure the bricks to the rack. To install the clip nuts, slide the clip nuts over the fifth hole of the selected 2U of space on each of the front rails. See Figure C-7 for details.
To install the brick in the rack, follow these steps:
| Note: Step 2 requires two people. |
Fully extend the left and right slide rails from the rack until they lock into place.
With one person holding each side of the brick, align the chassis rails of the brick with the slide rails of the rack.
Slide the chassis rails into the slide rails until the chassis rails are stopped by the safety latches.
Press the safety latches on both sides of the brick to fully seat the chassis rails into the slide rails (see Figure C-8).
Firmly tighten all screws (the eight screws that secure the slide rails to the rack rails).
Secure the brick to the rack by inserting a 10-32 x 1/2-inch Phillips screw in the top hole of each chassis ear (see Figure C-9).
Once the brick is installed in the rack, you can adjust the position of the brick in the rack (up and down, side-to-side). To adjust the position of the brick, loosen the front mounting screws, adjust the brick to the desired position, then tighten the mounting screws.
| Caution: Do not lift the brick by its bezel; it is not designed to handle the weight of the brick. Instead, use the chassis ears to move the brick (see Figure C-9). |
To remove a G2-brick or G2N-brick from a rack, follow these steps:
Power off the brick.
Disconnect all of the cables at the rear of the brick.
Warning: Components may be hot. To avoid injury, allow the components to cool for approximately five minutes before you proceed with these instructions. Remove the two screws that secure the brick to the front rails of the rack.
Carefully pull the brick from the rack until it is stopped by the safety latches.
With one person holding each side, release the safety latches on both sides of the brick and pull the brick out of the slide rail (see Figure C-10).
Place the brick on a flat, stable surface.
To slide the slide rails back into the rack, push down on the slide latches as shown in Figure C-11.
Note: Before you reinstall a brick into the rack, fully extend the slide rails from the rack until they lock into place.
