Chapter 4. Removing the Ultra SCSI Option Board
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## Chapter 4. Removing the Ultra SCSI Option Board

This chapter provides detailed information on removing the Ultra SCSI option board.

The following topics are included in this chapter:

- “Detaching the Ultra SCSI Option Board From the XIO Module”

- “Placing an Option Board or Blank Panel in Slot B”

- “Product Support”

- “Returning Parts”

Follow the directions in this chapter to remove this board and to install another board or blank panel in its place.

Figure 4-1. Orienting the XIO Module and Graphics Board

1. Go to Chapter 2, “Preparing the Workstation”, and follow the directions through removing the XIO module. Be sure you have placed a cap on the XIO compression connections of the graphics board, Ultra SCSI, and any other XIO boards. Then return to this section, and begin with step 2.

2. Position the XIO module so that slots D and A are facing you. The graphics board is in slot A or D and A. Locate the Ultra SCSI board. (An illustration of this board is shown in Appendix A, Figure A-1.)

## Detaching the Ultra SCSI Option Board From the XIO Module

Figure 4-2. Removing the Ultra SCSI Option Board

| Note: For illustration purposes, the Ultra SCSI option board is shown in slot C in this manual.

1. Remove the four screws holding the Ultra SCSI board to the XIO module.

2. Lift the Ultra SCSI board from the XIO module. Place it on an antistatic bag on a clean, dry, surface such as your desktop.

## Replacing the Guides on the XIO Module

Figure 4-3. Installing a Set of Guides

If your XIO module is missing a set of guides from a corner, replace them. If all three sets of guides are in place on the XIO module, go to the next section, “Placing an Option Board or Blank Panel in Slot B”. Otherwise go to step 1 to re-install the guides.

1. Re-install the set of guides, one on each side of the XIO module, on the outer corner of the slot from which you removed the Ultra SCSI board. The guides help with inserting the XIO module into the OCTANE workstation.

   - Insert the guide with the screw threads through the XIO module.

   - Screw the guides together.

2. Tighten the guides with the wrench that comes with the shipment.

## Placing an Option Board or Blank Panel in Slot B

After you have removed the Ultra SCSI option board, choose your next step from Table 4-1.

Table 4-1. Choosing the Next Instruction

Task | Go To
--- | ---
Installing a new Ultra SCSI board | Chapter 2, “Attaching the Ultra SCSI Option Board to the XIO Module”
Installing a different option board | The installation guide for that option board
Installing a blank panel | The next step

A blank panel must be installed in slot B of the XIO module if no option board is installed in that slot. If a blank panel is also in slot C, a baffle must be placed over them to allow proper airflow in the workstation.

Figure 4-4. Placing a Blank Panel on the XIO Module

1. Place the blank panel on the standoffs on the XIO module.

2. If you are installing a baffle, use two short screws to attach the blank panel (on the outside edge) to the XIO module, as shown in Figure 4-4.

3. If you are not installing a baffle, use four short screws (in all four holes) to install the blank panel to the XIO module if you are not installing a baffle. Use an M3 x 8 mm screw for the fourth hole, if you cannot find the fourth short screw that came with the blank panel.

   | Caution: Do not use the long screw that comes with the spacer to attach a blank panel to the XIO module. It will damage the XIO module standoffs.

   Figure 4-5. Placing the Baffle Over Two Blank Panels

4. If you have a blank panel in slot C, place a baffle over both blank panels.

   - Remove the two inside screws from the blank panel in slot C.

   - Place the baffle across the two blank panels.

   - Insert and tighten the four screws that hold the baffle to the blank panels and XIO module.

   | Caution: You must replace the baffle for cooling purposes when you install two side-by-side blank panels. The baffle is used only with two side-by-side blank panels.

5. If you are sending the Ultra SCSI option board to your authorized service representative, use the packing material and box in which you received your replacement part.

6. Go to “Replacing the XIO Module”.

## Product Support

Silicon Graphics, Inc. provides a comprehensive range of product support for its products. If you are in North America and would like support for your Silicon Graphics supported products, contact the Technical Assistance Center at 1-800-800-4SGI or your authorized service provider. If you are outside North America, contact the Silicon Graphics subsidiary or authorized distributor in your country.

## Returning Parts

To return any part, use the packaging materials and box that came with your replacement part.

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Chapter 3. Configuring the Ultra SCSI Option Board and Installing the Cables |  | Chapter 5. Troubleshooting