Appendix B. SGI 1400 Server Rackmount Installation

Safety Guidelines

Before you remove a server cover, observe these safety guidelines:

  • Only technically qualified personnel should mount the server in a rack.

  • Turn off all peripheral devices connected to the server.

  • Turn off the server using the push-button on/off power switch on the front panel of the server, and unplug the AC power cord from each power supply or wall outlet.

  • Label and disconnect all peripheral cables attached to the I/O panel on the back of the server.

Server Precautions


Warning: Server power on/off: The push-button on/off power switch on the front panel of the server does not turn off the AC power. To remove AC power from the server, you must unplug each AC power cord from each power supply or wall outlet.

Hazardous conditions—power supply and power share backplane: Hazardous voltage, current, and energy levels are present inside the power supply and the power share backplane enclosures. There are no user-serviceable parts inside them; servicing should only be done by technically qualified personnel.

Hazardous conditions—devices and cables: Hazardous electrical conditions may be present on power, telephone, and communication cables. Turn off the server and disconnect telecommunications systems, networks, modems, and each power cord attached to the server before opening it. Otherwise, personal injury or equipment damage can result.

Shock and vibration conditions: The server's mounting rails do not provide dampening and insulation from excess mechanical vibration and shock. If you are installing the server in a location that is subject to shock and vibration in excess of the values these units are rated to, you must obtain an appropriate mounting system.



Note: Although the hardware supplied with the server enables you to mount these systems in most all 19-inch equipment racks, installation in such racks may require submittal to an approved safety agency for evaluation, certification, and licensing for the new rack-system combination. Check with your local building inspector for requirements applicable to your location.



Warning: Avoid injury: To avoid personal injury when unpacking the server, use two people and/ or a mechanical assist unit to lift it off the shipping pallet. The minimum server configuration weighs 38 kg (85 lbs); the maximum weighs 45 kg (100 lbs). Use only a hand-truck or other mechanical assist unit to move the server from one location to another.



Caution: Electrostatic discharge (ESD) and ESD protection: ESD can damage disk drives, add-in boards, and other components. This server can withstand normal levels of environmental ESD while hot–swapping SCSI hard disk drives. However, we recommend doing all procedures in this manual only at an ESD-protected workstation. If one is not available, you can provide some ESD protection by wearing an antistatic wrist strap attached to chassis ground of the server—any unpainted metal surface—when handling components.

Server cooling and airflow: Operating the server with the covers removed can damage the server components. For proper cooling and airflow, always replace the covers before turning on the server.


Equipment Rack Precautions


Warning: Anchor the equipment rack: The equipment rack must be anchored to an unmovable support to prevent it from falling over when one or more servers are extended in front of it on slide assemblies. The anchors must be able to withstand a force of up to 113 kg (250 lbs). You must also consider the weight of any other device installed in the rack.

Main AC power disconnect: You are responsible for installing an AC power disconnect for the entire rack unit. This main disconnect must be readily accessible, and it must be labeled as controlling power to the entire unit, not just to the server(s).

Grounding the rack installation: To avoid the potential for an electrical shock hazard, you must include a third wire safety grounding conductor with the rack installation. If server power cords are plugged into AC outlets that are part of the rack, then you must provide proper grounding for the rack itself. If server power cords are plugged into wall AC outlets, the safety grounding conductor in each power cord provides proper grounding only for the server. You must provide additional, proper grounding for the rack and other devices installed in it.



Warning: Overcurrent protection: The server is designed for an AC line voltage source with up to 20 amperes of overcurrent protection. If the power system for the equipment rack is installed on a branch circuit with more than 20 amperes of protection, you must provide supplemental protection for the server. If more than one server is installed in the rack, the power source for each server must be from a separate branch circuit. The overall current rating of a server configured with three power supplies is under 12 amperes.



Caution: Temperature: The operating temperature of the server, when installed in an equipment rack, must not go below 5 ˚C (41 ˚F) or rise above 35 ˚C (95 ˚F). Extreme fluctuations in temperature can cause a variety of problems in your server.

Ventilation: The equipment rack must provide sufficient airflow through the front of the server to maintain proper cooling. It must also include ventilation sufficient to exhaust a maximum of 4,100 Btu's per hour for the server. The rack selected and the ventilation provided must be suitable to the environment in which the server will be used.


Introduction

The SGI 1400 server is designed to either stand upright (pedestal mode) or be mounted in a rack (rack mode). Figure 1-1 in Chapter 1 shows examples of these configurations. If you ordered a rackmountable server, the information in this appendix explains the proper procedure for mounting it.

Table B-1 provides size information that may help the processes of installing the server in an EIA-compatible 19-inch equipment rack.

Table B-1. Server Physical Specifications

Specification

Pedestal Mode

Rack Mode

Height

48.26 cm (19 inches)

7u

Width

31.12 cm (12.25 inches)

19 inch rack

Depth

63.5 cm (25 inches)

25 inches

Weight

38.25 kg (85 lbs) minimum configuration
45 kg (100 lbs) maximum configuration

38.25 kg (85 lbs) minimum configuration
45 kg (100 lbs) maximum configuration

Required front clearance

10 inches (inlet airflow <35 ˚C / 95 ˚F)

10 inches (inlet airflow <35 ˚C / 95 ˚F)

Required rear clearance

8 inches (no airflow restriction)

8 inches (no airflow restriction)

Required side clearance

0.0 inches (additional side clearance required for service)

N/A

Shock
Operating


2.0 g, 11 msec, 1/2 sine


2.0 g, 11 msec, 1/2 sine


Tools You Need

You will need the following tools to complete the installation:

  • Phillips (cross-head) screwdriver (#1 and #2 bits)

  • Pencil

Prepare the Slide Assemblies

Use Figure B-1 and the following steps to prepare the rackmounting slide assemblies.

  1. Remove the slide assemblies from the kit.

  2. Orient a slide assembly so that the smallest outer bar is facing down.

  3. Fully extend the telescoping slide assembly until the center bar hits the safety latch on the small outer bar (all three overlapping bars will be visible).

  4. Grasp the small outer bar with your hand so that your thumb is on the safety latch of the small outer bar.

  5. Press and hold the safety latch down, and at the same time, grasp the large outer bar with your free hand.

  6. Pull the small bar out of the center bar; this takes a little force to separate them. Set the small bar aside to attach to the chassis in a later step.

  7. Orient the center bar and large outer bar assembly so that the center bar is facing up.

  8. Grasp the center bar with one hand and the large outer bar with your other hand so that your thumb is on the safety latch of the center bar.

  9. Press the safety latch, and slide the bars together. Set the center bar and large outer bar assembly aside to attach to the equipment rack in a later step.

  10. Prepare the other slide assembly by repeating steps 2–9 above.

    Figure B-1. Outer Slide Assembly


Figure B-1 components shown are:

  1. Large outer bar

  2. Center bar

  3. Small outer bar

  4. Safety latch on the small outer bar

  5. Safety latch on the center bar

Prepare the Server

Before you can install the server in the 19-inch equipment rack, you must install a bezel, handles, and the small bars of the slide assemblies onto the sides of the server.

Attaching the Bezel Frame and Door

To be installed in a rack, the server needs a bezel frame with rectangular cutouts where the chassis handles fit.

  1. Attach the bezel frame by inserting the tabs at the corner of the frame into their corresponding rectangular slots on the chassis.

  2. Attach the bezel door: with the door all the way open (down, as the server lay as it would when inserted in a rack), align the tabs on the door with their corresponding hinge loops on the chassis; slide the door to the right to engage the tabs in the loops.

Attach the Chassis Handles

Before you can attach the chassis handles, the server must be on its side, in the horizontal position in which you will slide it into the rack. If the server is not already in the proper position, you must move it. See step one, below.


Caution: The server is heavy (up to 45 kg [100 lbs]), be sure to read all the warnings at the beginning of this appendix. Always use at least two people to mount the server in a rack.


  1. If the server is not already in the proper position, then face the front of the server and, with the help of a mechanical assist unit, carefully tip it onto its side. The long front edges (19 inches) should now be horizontal; the short front edges (12.25 inches) should now be vertical, with the front-panel LEDs at the top left and the hard drive bays at the bottom right of the front panel.

    The bezel frame has rectangular cutouts on its edges where the chassis handles fit; you should be able to see two threaded holes in that cut-out space where the handles attach to the chassis.

  2. Orient each handle so the two screw holes on the long edge of each handle align with the threaded holes in the chassis. Because the bezel frame's cutouts act as guides, the handles can be installed in only one way.

  3. Use four screws from the kit to attach the handles to the chassis.

Attach the Small Bar of the Slide Assembly to the Server

Use Figure B-2 and the following steps to properly attach the small bar of the slide assembly to the server chassis.

  1. Remove four screws from the kit.

  2. While facing the side of the server, orient the small bar so that the flat side faces the top and the right-angle end faces the front of the server.

  3. Align the first hole in the right-angle end of the bar with the first threaded hole in the side of the chassis.

  4. Insert a screw through the hole in the bar and into the chassis wall. Then loosely tighten the screw.

  5. Align the rest of the holes in the bar with the remaining three threaded holes along the side of the chassis.

  6. Insert three more screws through the bar and into the threaded holes in the chassis wall. Then tighten all four screws firmly (6.0 inch-pounds).

  7. To install the remaining small bar on the other side of the chassis, repeat steps 1–6.

    Figure B-2. Small Bar of the Slide Assembly


Figure B-2 components shown are:

  1. Threaded hole in chassis

  2. Safety latch

  3. Screw

  4. Small outer bar (right-angle end)

Preparing the Equipment Rack

Before you can install the server in the 19-inch equipment rack, you must attach the center bar and large outer bar assemblies to the vertical rails of the rack.

Attach the Center and Large Outer Bar Assemblies

When mounting the server in a rack you should connect the sliding bar assemblies to the right-angle brackets prior to installing them.

Use the following steps and Figure B-3 to attach the center bar and outer bar assemblies to the right-angle brackets that screw onto the vertical rack rails.

  1. Orient a center bar and large outer bar assembly so that the flat side is facing toward the brackets attached to the vertical rails and the safety latch on the center bar is near the back of the rack.

  2. Press the flat side of the outer bar into the U–shaped sections of the brackets.

  3. Slide the assembly toward the front of the rack until the end of the outer bar is flush with the end of the U-shaped section of the front bracket, see Figure B-3.

  4. Gently slide the center bar toward the front of the rack, and position the oblong slot in it over the first hole in the large outer bar. Insert a screw through the hole in the bar and the first hole in the front angle-bracket. Place a lock washer and a nut on the screw, and loosely tighten it.

  5. Position the oblong slot in the center bar over the third hole back from the front of the large outer bar. Insert an 8-32 screw through the hole and the oblong slot in the front bracket. Place a lock washer and an 8–32 nut on the screw, and loosely tighten it.

  6. The back bracket has two holes and three slots in it. This end of the outer bar has four holes in it. Which holes and slots you use depend on the depth of the equipment rack. After fitting the bar into the bracket, insert two screws through the holes in the bar and the appropriate oblong slots in the bracket. Place a lock washer and a nut on each screw, and loosely tighten them.

    Figure B-3. Center Bar and Large Outer Bar Assembly


Figure B-3 shows the bar assembly and specific components:

  1. Back right-angle extension bracket

  2. Screws and their mounting locations

  3. Flat washer, lock washer, and nut

  4. Large outer bar

  5. Safety latch location on the center bar

  6. Center bar

  7. Front right-angle extension bracket

Attach the Bracket and Rail Assemblies to the Equipment Rack


Note: Mounting holes in the vertical rails of equipment racks are commonly spaced in a 5/8 x 5/8 x 1/2-inch sequence. Perform the following steps carefully; brackets must be mounted with precision to allow room for the next server you install in a rack. You may want to mark the appropriate top and bottom holes with a pen or pencil.


  1. Remove two screws, and a bar nut from the kit.

  2. Select one of the right-angle bracket and rail assemblies that you put together using the information in “Attach the Center and Large Outer Bar Assemblies”.

  3. While facing the front or back of the rack, orient the right-angle extension bracket and rail assembly so that the short side with the four mounting holes is facing toward the outside edge of the vertical rail.

  4. Position the bracket behind the mounting holes in the vertical rail, see Figure B-4 for an example.

  5. With a pencil, mark the top and bottom hole locations of the bracket on both sides of the vertical rail; no hole numbers are printed on the rail.

  6. Insert a screw through the marked top hole in the rail and through the top hole in the bracket. Place a bar nut on the screw and loosely tighten it. Repeat for the marked bottom hole.

  7. Go to the rear of the system and make sure the bracket and slide-rail assembly is in horizontal alignment with the front. Repeat the connection procedure from step 6.

  8. Install the other right-angle extension brackets and slide rail assembly on the other side by repeating steps 1–7.

  9. Ensure that the brackets and bars are positioned correctly in the rack. Then tighten all bracket and rail screws firmly (6.0 inch-pounds).

    Figure B-4. Right-angle Bracket and Vertical Rail


Figure B-4 components shown are:

  1. Screw

  2. Vertical rail

  3. Bar nut

  4. Right-angle extension bracket

Install the Server in the Rack


Warning: Anchor the equipment rack: The equipment rack must be anchored to an unmovable support to prevent it from falling over when one or more servers are extended in front of it on slide assemblies. The anchors must be able to withstand a force of up to 113 kg (250 lbs). You must also consider the weight of any other device installed in the rack.

Use the following steps to install the server in the rack:

  1. Pull the telescoping center bars out of the large outer bars until they are fully extended and locked in place.

  2. Use a mechanical assist unit to carefully pick up the server; gently slide the small bars attached to each side of the server into the extended center bars.

  3. When the server stops, press in on the safety latches on the small bars and gently slide the server into the rack.

  4. Connect all external cables and the power cord(s) to the server.

    Figure B-5. Installing the Server in the Rack


Figure B-5 components shown are:

  1. Small outer bar

  2. Center bar

  3. Large outer bar

  4. Safety latch