7 SPARCclassic and SPARCstation LX Systems: Installing and Removing Hard Disk Drives

This chapter explains how to install and remove the 1.05 Gbyte hard disk drive in both the SPARCclassic and the SPARCstation LX systems.

Caution -

First Steps

Before you begin:

1. Read the "Safety Agency Compliance" section in the Preface for the safety precautions.

2. Read Chapter 1 to determine which tools are required, which operating system you have, how to back up your system, and how to shut the system down.

SCSI Termination and Cable Length

Recently released Sun systems and peripherals are now supplied with new regulated (active) SCSI terminators. Previously, Sun supplied standard SCSI terminators. Both types are shown below.

All SCSI systems must be terminated at the first and last units attached to the SCSI bus. A terminator is built in to all SBus SCSI cards and to all host systems. For the last unit attached to the SCSI bus, the new regulated terminators provide the improved impedance matching required for fast SCSI.

The total SCSI bus length (including internal and external SCSI cables) for each single ended SCSI bus, as shown below, must not exceed 6 meters (20 feet). Refer to Appendix A for more information.

The regulated terminators must be used for all 50-pin SCSI buses having fast SCSI drives on a fast SCSI host.

Devices with the 3-row 50-pin D connector or the 50-pin ribbon connector (old- style connectors) should not be used on the same bus with fast SCSI devices.

The mixing of fast SCSI devices and old-style connector devices in the same daisy chain is not recommended.If fast SCSI devices and old-style connector devices must be used in the same system, the old-style connector devices should be connected to a separate SCSI port that contains no fast SCSI devices.

Opening the Cover

To open the system unit:

1. Make sure that the system power switch is in the Standby position.

The green LED on the front of the system unit should not be lit, and the fan should not be running. Leave the AC power cord connected to both the system unit and wall outlet.

2. Position the system on the table with the rear panel towards you.

Leave enough space to lay the top section of the unit flat in front of the bottom.

3. Remove the screw that secures the lock block to the back panel. Refer to Figure 7-1.

4. Grasp the unit top near its rear corners and carefully open the system unit like a suitcase. Refer to Figure 7-1.

Lay the unit top half flat on the table behind the unit's bottom half. The unit top and bottom are still connected by the power and data cables leading from the disk drive(s) and power supply to the main logic board.

Figure 7-1 Opening the System Unit

Refer to Figure 7-2 to see the various subassemblies of these systems, including the location of the power supply.

Figure 7-2 View of Opened System Unit

Attaching a Wrist Strap

The wrist strap provides grounding between your body and the chassis for static electricity. Electric current and voltage do not pass through the wrist strap.

Caution -

To attach the wrist strap:

1. Wrap the wrist strap twice around your wrist with the conductive adhesive side against your skin.

2. Attach the end with the adhesive copper strip to the metal casing of the power supply in the system unit. See Figure 7-2.

Note - Do not have the wrist strap attached and the system powered up when you handle the drive to verify the jumper settings.

Unpacking the Drive

Two types of drive kits can be ordered:

• Complete drive kits

• Replacement drives

If you ordered a complete drive kit, the box should contain:

• Hard disk drive

• Data cable

• Wrist strap

• Regulated SCSI terminator

If you ordered a replacement drive, the kit will contain only the disk drive.

To unpack the drive:

1. Remove the disk drive (and its related equipment if you ordered a complete drive kit) from the packing material.

Compare the packing list with the equipment you received.

2. Place the drive on an antistatic surface.

3. Save the box and the packing material in case you have to ship the drive at some future date.

Locating the Jumpers on the Drive

The three sets of jumper blocks on the 1.05 Gbyte hard disk drive are located on the sides and underside of the drive. Two of the blocks are indicated below. The third block, which is located on the backside of the drive and is not shown in Figure 7-3, is not jumpered. You must not add any jumpers to this block.

Figure 7-3 1.05 Gbyte Hard Disk Drive Jumper Locations

As shown above, there are two sets of jumper blocks that you need to check on for the 1.05 Gbyte drive:

• SCSI Target ID jumpers

• Configuration jumpers

The 1.05 Gbyte hard disk drive is a SCSI (Small Computer Systems Interface) device. Each SCSI device in your system needs a specific and unique SCSI ID. The SCSI ID jumpers must be set to SCSI address 3. Verify that this is the factory default setting.

Verifying the SCSI Jumpers

To verify the SCSI ID jumpers:

1. Place the drive on an antistatic surface.

a. Compare the disk drive address jumper settings to the settings shown in Figure 7-4.

If the device address jumper settings are the same as in Figure 7-4, leave them as they are.

If the settings are not the same, change them to match the settings in the figure. Use a needlenose pliers to install or remove jumpers.

Figure 7-4 Drive Address Jumper Settings

Verifying the Configuration Jumpers

To verify the configuration jumpers, compare the drive configuration jumper settings to the settings shown in Figure 7-5.

If the jumper settings are the same as in Figure 7-5, leave them as they are.

If the jumper settings are not the same, change them to match the settings in the figure. Use a needlenose pliers to install or remove jumpers.

Figure 7-5 Configuration Jumper Settings J

---------------------------------------

         
Acronym  Description
---------------------------------------

         
RS       (Reserved)
         
DS       Delayed Start
         
ME       Motor Enable (Remote Spin-up)
         
WP       Write Protect
         
PE       Parity Enable
         
SS       (Reserved)
         
TP       Term Power from Drive
         
TP       Term Power to SCSI Bus

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Installing a Hard Disk Drive

To install a hard disk drive:

1. Make sure you have completed the procedures for verifying and setting drive jumpers.

2. Make sure the wrist strap is attached properly.

3. If present, remove the four mounting screws from the old disk drive. Refer to Figure 7-6.

Insert the screws halfway into the two outermost holes on both sides of the new disk drive.

4. Attach the data cable to the disk drive.

5. Lower the disk drive into the disk drive bracket slots so that the four screws fit securely in the slots.

Figure 7-6 Installing a Hard Drive

6. Tighten the four screws.

7. Attach the drive data cable to the main logic board, and attach the internal drive power cable to the disk drive. Refer to Figure 7-2.

8. Close the system unit.

Refer to the section, "Closing the System Unit."

9. Connect the regulated SCSI terminator to the last device in the daisy- chain if you have SCSI devices attached to your system.

A regulated (active) terminated is shown below.

Removing a Hard Disk Drive

The installation procedure for replacing a drive requires you to remove the drive bracket, the data cable, and the power cable from the previously installed drive to install them on the replacement drive.

Caution - Do not disconnect the power cord from the system unit power outlet or from the wall outlet. This connection provides the ground path necessary to safely remove and install the hard disk drive.

To remove a drive:

1. Back up your system.

2. Shut down the system.

3. Make sure that the power cable is connected to the system unit and to a wall outlet.

4. Open the system unit.

Refer to the section, "Opening the System Unit."

5. Make sure the wrist strap is attached to your wrist and to the power supply of the system unit.

Refer to the section, "Attaching a Wrist Strap."

6. Disconnect the drive data cable from its connector on the main logic board. Refer to Figure 7-7.

7. Disconnect the power cable from the hard drive. Refer to Figure 7-7.

8. Disconnect the data cable from its connector on the hard drive.

Set the data cable aside for installation on the replacement drive.

9. Loosen the four screws that secure the hard drive to the drive mounting bracket.

10. Lift the drive straight up to remove it from the system unit.

Place the drive on an antistatic surface.

Figure 7-7 Removing a Hard Disk Drive

11. Refer to the section, "Installing a Hard Disk Drive." to install a new drive.

Closing the System Unit

To close the system unit cover:

1. Check that there are no loose tools or screws in the unit, and that all SBus cards and SIMMs are seated properly.

2. Check that all internal cable connections are secure, and that the power supply wiring is tucked inside the system to avoid pinching the wiring when you close the system unit.

3. Detach and remove the wrist strap.

4. Grasp the unit top near the power supply.

Rotate the unit top at a 15 degree angle and rotate your hand position so that thumbs and fingers point up and the five interlock hooks can be lined up.

Note - The interlock hooks do not engage until the unit is lowered to a 45 degree angle. Continue to hold the cover.

5. Reconnect the top and the bottom of the unit. Refer to Figure 7-8.

a. Rest the front edges together to connect the interlock hooks by pushing gently toward the back of the unit.

b. As you lower the unit top, continue to push back to secure the connection. The unit top will rest slightly forward.

c. Gently push the unit top back a few millimeters until the unit top and bottom are aligned.

Figure 7-8 Closing the System Unit

6. Attach the lock block. Refer to Figure 7-9.

Attach the lock block by inserting the PEM screw through the block on the outside, the security loop on the inside, and into the power supply. Tighten the screw with a screwdriver. Be careful not to overtighten the screw.

Figure 7-9 Attaching the Lock Block

7. Reconnect the peripherals.

See the installation manual that came with your External Storage Devices for further instructions.

8. Power up the system.

See the "Restoring Power to the System" section.

Restoring Power to the System

Turn on the power switches in the following order:

1. External peripherals (if any)

2. Monitor

3. SPARCclassic or SPARCstation LX system

If you replaced a hard disk drive containing your operating system, you must install your operating system onto the hard disk. Refer to the software manuals that were shipped with your operating system for complete instructions.

Booting the Operating System

Boot the system:

1. Go to the handbook that is appropriate for your operating system.

2. See the section about booting the system, then return to this manual after you perform this procedure.

After you boot the operating system, log in at the login prompt.

Completing the System Configuration

For a newly installed peripheral device to work with a computer system, its device driver must be added or activated. Procedures for adding or activating a device driver differ among operating systems.

For example, if your system is running SunOS Version 4.x, you might need to modify the system kernel and make changes to the /dev directory by running the MAKEDEV command.

1. Go to the handbook appropriate for your operating system.

2. See the chapter about setting up the peripheral device.