Dell PowerEdge 6400 User manual
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Throughout this guide, blocks of text may be accompanied by an icon and printed in
bold type or in italic type. These blocks are notes, notices, cautions, and warnings,
and they are used as follows:
NOTE: A NOTE indicates important information that helps you make better use of
your computer system.
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____________________
Information in this document is subject to change without notice.
© 2000 Dell Computer Corporation. All rights reserved.
Trademarks used in this text: Dell, the DELL logo, and PowerEdge are trademarks of Dell Computer
Corporation. Other trademarks and trade names may be used in this document to refer to either
the entities claiming the marks and names or their products. Dell Computer Corporation disclaims
any proprietary interest in trademarks and trade names other than its own.
May 2000 P/N 73JXG Rev. A02
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support.dell.com SCSI Backplane Option 1
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This document describes the installation procedure for the optional small computer
system interface (SCSI) backplanes for the Dell PowerEdge 4x00 and 6x00 systems.
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To replace your computer’s SCSI backplane board with a different backplane board,
perform the following steps.
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1. Turn off the system, including any attached peripherals, and disconnect the sys-
tem from the electrical outlet.
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2. Unpack the SCSI backplane board upgrade kit.
3. Remove the computer cover and front bezel.
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4. Remove the hard-disk drives from the system.
5. Slide the system board tray to its service position.
6. Disconnect the SCSI cable from the SCSI backplane board.
To avoid damage to the cable, use the strain-relief loop to disconnect the cable.
73JXGbk2.book Page 1 Wednesday, May 17, 2000 4:49 PM
2 SCSI Backplane Option
7. Disconnect the flat data cable from the locking connector on the backplane
board.
8. Disconnect the power cable labeled "HD-B/P" from the power connector on the
backplane board.
To release the connector, press the latch on the side of the connector.
9. Disconnect the fan power cable from the power connector labeled "FAN" on the
backplane board.
To release the connector, press the latch on the side of the connector.
10. Loosen the captive thumbscrew on the backplane board.
11. Slide the SCSI backplane board away from the chassis inner wall approximately
1 centimeter (cm) (a quarter inch), and then lift the board off of the L-shaped
mounting tabs and away from the chassis (see Figure 1).
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1Thumbscrew
2SCSI backplane board
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support.dell.com SCSI Backplane Option 3
12. Install the new backplane board:
a. While holding the backplane board by its edges, position the board so that
the tabs on the computer chassis wall fit through the corresponding slots in
the backplane board.
b. Slide the backplane board toward the power supply paralleling board.
c. Secure the backplane board by tightening the captive thumbscrew.
d. Connect the 20-pin data cable from the system board to the connector
labeled "PLANAR" on the backplane board (see Figure 2 or Figure 3).
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1Cooling fan power cable connector (FAN)
2Power connector (POWER)
3System-board data cable connector (PLANAR)
4Ultra3 SCSI cable connector (SCSIA)
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4 SCSI Backplane Option
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13. Connect the power cable labeled "HD-B/P" to the connector labeled "POWER" on
the backplane board.
14. Connect a SCSI cable from the connector labeled "SCSIA" on the backplane board
to the connector labeled “PRIMARY SCSIA”on the system board, or to a SCSI
host adapter card.
15. If you want to operate the backplane in a split 2 x 4 configuration, connect a SCSI
cable from the connector labeled "SCSIB" on the backplane board to the second
Ultra3 SCSI connector on the system board, or to a SCSI host adapter card.
NOTES: When the 2 x 4 SCSI backplane is cabled to two SCSI host adapter
cards, the SCSI host adapter cabled to the 2 x 4 backplane’s SCSIA connector will
control the four top hard-disk drives of a rack-mounted system (or the four left-
most hard-disk drives of an upright free-standing system) with SCSI IDs 0, 1, 2,
and 3; and will control the four bottom hard-disk drives of a rack-mounted system
(or the four rightmost hard-disk drives of an upright free-standing system) with
SCSI IDs 4, 5, 8, and 9.
1Ultra3 SCSI cable connector (SCSIA)
2Ultra3 SCSI cable connector (SCSIB)
3Cooling fan power cable connector (FAN)
4Power connector (POWER)
5System-board data cable connector (PLANAR)
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support.dell.com SCSI Backplane Option 5
You can configure the 2 x 4 SCSI backplane as a 1 x 8 backplane by connecting
only the connector labeled "SCSIA" on the backplane board to a SCSI controller.
16. Slide the system board tray back into the system chassis.
Does the new SCSI backplane board have a different number of drive bays?
Ye s .You must change the orientation of the two drive bay keys to match the new
backplane. Go to step 17.
No.Go to step 23.
17. Turn the key in the keylock to lock the drive-locking flange (see Figure 4).
With the flange in the locked position, you have easier access to the upper drive
bay key.
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1Screws (6)
2Drive-locking flange
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6 SCSI Backplane Option
18. To remove the upper drive bay key, remove the three screws.
19. To remove the lower drive key, remove the three screws securing the key to the
chassis.
20. Rotate each drive bay key so that the "6" or "8" stamped on the end of each key
faces forward and matches the drive capacity of the new backplane (see
Figure 5).
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21. Reinstall the lower drive key using the three screws.
22. To reinstall the upper drive key, lock the drive-locking flange and reinstall the three
screws through the flange cutouts.
1Key stamp
2Lower drive bay key
3Upper drive bay key
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support.dell.com SCSI Backplane Option 7
23. Replace the front bezel and computer cover.
24. Reinstall the hard-disk drives in the computer.
NOTE: You can use only 1-inch hard-disk drives with an 8-bay backplane—you cannot
use 1.6-inch hard-disk drives. (A 6-bay backplane can accommodate 1.6-inch or 1-inch
drives.) If you install an 8-bay backplane, you need to convert the drive carriers to the
1-inch width by removing the spacer insert that fastens to each carrier adjacent to the
carrier release handle.
25. Reconnect the computer and peripherals to their AC power sources.
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8 SCSI Backplane Option
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