WARNING: Before you install a new backplane board or host adapter card, you must turn off the computer and disconnect it from its AC power source. For more information, see "Safety First—For You and Your Computer."
The hard-disk drive bays provide space for up to four 1.6-inch or six 1-inch hard-disk drives. (See "Installing Drives in the External Bays" for information on installing SCSI CD-ROM drives and SCSI tape drives in the external drive bays.)
Figure 1 illustrates the hard-disk drive bays, the hot-plug SCSI backplane board, and the Ultra2/low voltage differential (LVD) SCSI cable. The Ultra2/LVD SCSI cable has two connectors:
The connector at one end attaches to the Ultra2/LVD SCSI host adapter connector labeled "SCSI1" on the system board or to an optional SCSI host adapter card such as the Dell PERC 2.
The connector at the other end of the cable attaches to the connector labeled "SCSIA" on the SCSI backplane board.
Figure 1. Hard-Disk Drive Hardware
SCSI hard-disk drive bays
2
SCSI backplane board
3 System board
4 Ultra2/LVD SCSI host adapter connector (SCSI1)
5 Ultra2/LVD SCSI interface cable
Preparing SCSI Hard-Disk Drives for Installation
NOTES: For maximum performance, install Ultra2/LVD drives exclusively. Although you can install a mixture of Ultra2/LVD and Ultra hard-disk drives, they will operate at the slower Ultra transfer rate.
Dell recommends that you use only drives that Dell has tested and approved for use with the SCSI backplane board.
SCSI Hard-Disk Drive Configuration
The SCSI drives must be configured as follows:
Disable termination on the drives. The SCSI backplane board provides termination for the SCSI bus.
Set the SCSI ID on all drives to 0. All SCSI ID numbers for the drives are set by the SCSI backplane board (the rightmost drive is set to SCSI ID 0).
Configure the drives so that the drive motor waits for a Start Unit command from the SCSI host adapter before spinning.
Partitioning and Formatting SCSI Hard-Disk Drives
You may need to use different programs than those provided with the operating system to partition and format SCSI hard-disk drives. See "Installing and Configuring SCSI Drivers" in the User's Guide for information and instructions.
NOTICE: Do not turn off or reboot your system while the drive is being formatted. Turning off or rebooting your system while the drive is being formatted can cause a drive failure.
When you format a high-capacity SCSI hard-disk drive, be sure to allow enough time for the formatting to complete. Long formatting times for these drives are normal. A 9-gigabyte (GB) hard-disk drive, for example, can take up to 2.5 hours to format.
Installing SCSI Hard-Disk Drives
SCSI hard-disk drives are supplied by Dell in special drive carriers that fit in the hard-disk drive bays. To install a SCSI hard-disk drive, perform the following steps.
NOTICE: Hot-plug drive installation is not supported for systems without an integrated PERC 2/Si redundant arrays of independent disks (RAID) controller or Dell PERC 2 host adapter card.
If the system does not have a RAID controller installed, shut down the system.
Unlock and open the front bezel.
For systems with RAID controllers, power down the hard-disk drive bay. If a hard-disk drive is currently installed in the bay, wait until all three SCSI hard-disk drive indicators on the hard-disk drive carrier handle are turned off before proceeding.
Open the drive carrier handle and slide the old carrier toward you until it is free of the drive bay.
Open the handle on the new hard-disk drive carrier.
Align the edge of the carrier with the notches in the hard-disk drive bay keys and insert the carrier into the drive bay (see Figure 2).
Figure 2. Installing a SCSI Hard-Disk Drive Carrier
1 Hard-disk drive carrier
2
Hard-disk drive carrier handle
Close the drive carrier handle to lock the new drive carrier in place.
Close and lock the front bezel.
For systems with RAID controllers, restore power to the drive bay.
If the hard-disk drive is a new drive, run the Dell Diagnostics to test the new drive.
Installing a Dell PowerEdge Expandable RAID Controller Host Adapter Card
Follow these general guidelines when you install a Dell host adapter card. For specific instructions, refer to the documentation supplied with the PERC host adapter card.
WARNING: Before you install the host adapter card, you must turn off the computer and disconnect it from the electrical outlet. For more information, see "Safety First—For You and Your Computer."
NOTICE: See "Protecting Against Electrostatic Discharge."
Unpack the host adapter card and prepare it for installation.
Refer to the documentation accompanying the host adapter card.
Remove the right side computer cover.
Install the host adapter card.
Detach the interface cable from the Ultra2/LVD SCSI host adapter connector on the system board (labeled "SCSI1") (see Figure 1 in "Installing System Options" for the location of this connector).
Connect the end of the Ultra2/LVD SCSI interface cable to the connector on the host adapter card.
To identify the correct connector, refer to documentation for the host adapter card.
NOTE: If you will be attaching external SCSI devices using the external SCSI connection slots on the computer's back panel, perform steps 6 through 8; otherwise, go to step 9.
Connect the SCSI external access cable from the host adapter kit to the Ultra2/LVD SCSI host adapter connector (labeled "SCSI1") on the system board.
Attach the other end of the SCSI external access cable to the computer's back panel.
If you are attaching multiple external SCSI devices, daisy-chain the devices to each other using the cables shipped with each device.
See each device's documentation for information on cabling that device as part of a daisy chain.
Replace the computer cover and front bezel, and then reconnect the computer and peripherals to their AC power sources.
Connect the external SCSI device(s) to electrical outlet(s).
For each external device, plug the socket end of the power cable into the power receptacle on the back of the device. Plug the other end of the power cable into an electrical outlet.
Install any required SCSI device drivers.
See "Installing and Configuring SCSI Drivers" in the User's Guide for information and instructions.
Test the SCSI devices.
Test a SCSI hard-disk drive by running the Dell Diagnostics. To test a SCSI tape drive, also refer to the documentation for the tape drive software to perform a tape drive backup and verification test.
Installing a SCSI Backplane Board
To replace a SCSI backplane board with a different backplane board, perform the following steps.
NOTICE: See "Protecting Against Electrostatic Discharge."
Unpack the SCSI backplane board upgrade kit.
Remove the right-side computer cover.
NOTICE: You must remove all hard-disk drives to avoid damaging the SCSI backplane board when you remove it later in this procedure.
Remove the hard-disk drives from the system.0
Disconnect the Ultra2/LVD SCSI cable labeled "BACKPLANE" from the SCSI backplane board.
To avoid damage to the cable, use the strain-relief loop to disconnect the cable.
Disconnect the data cable labeled "PLANAR" from the backplane board.
Disconnect the power cable labeled "PWR2" from the power connector on the backplane board.
To release the connector, press the latch on the side of the connector.
Loosen the captive thumbscrew on the backplane board.
Slide the existing SCSI backplane board away from the system board approximately 1 cm (a quarter inch), and then lift the board off of the L-shaped mounting tabs and away from the chassis.
Are you installing a SCSI backplane with a different number of drive slots?
Yes. Go to step 10.
No. Go to step 12.
Remove the hard-disk drive bay key from the front of the system chassis by removing the three screws securing it to the chassis.
Reverse the orientation of the drive bay key so that the number of slots on the key's upper edge match the drive capacity of the new backplane, and reinstall the key using the three screws you removed in the previous step.
Install the new backplane board (see Figure 3):
While holding the backplane board by its edges, position the board so that the eight tabs on the computer chassis wall fit through the corresponding slots in the backplane board.
Slide the backplane board toward the system board.
Secure the backplane board by tightening the captive screw.
Figure 3. Installing a SCSI Backplane Board
Tabs (8)
2
SCSI backplane board
Connect the 20-pin data cable leading from the system board to the connector labeled "PLANAR" on the backplane board (see Figure 4).
Figure 4. SCSI Backplane Board
1
Power connector (POWER)
2
Ultra2/LVD SCSI cable connector (SCSIA)
3 System-board data cable connector (PLANAR)
Connect the power cable labeled "PWR2" to the connector labeled "POWER" on the backplane board.
Connect the Ultra2/LVD SCSI cable leading from the system board to the connector labeled "SCSIA" on the backplane board.
Reinstall the hard-disk drives in the computer.
NOTE: The 1 x 6 SCSI backplane board accommodates only 1-inch hard-disk drives. Do not attempt to reinstall 1.6-inch hard-disk drives if you install a 1 x 6 backplane.
Configuring the Boot Device
If you plan to boot the system from a hard-disk drive, the drive must be attached to the primary (or boot) controller or SCSI host adapter card. You can select the primary controller using the System Setup program. See "Using the System Setup Program" in the User's Guide for instructions.
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