Dell PowerEdge 6850 - Manual (Page 16)

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SAS Information Update
Figure 1-7. SAS Backplane Board Connectors: 2.5-inch Option
Replacing a 3.5-Inch SAS Backplane
CAUTION:
Any installation that requires removal of the system cover is intended solely to be performed by
trained service technicians. See your Product Information Guide for complete information about safety
precautions, working inside the computer, and protecting against electrostatic discharge.
To replace a 3.5-inch SAS backplane, follow the steps for removing and installing a SCSI backplane
described in "SCSI Backplane" in the Installation and Troubleshooting Guide, substituting the connectors
on the SAS backplane board for the corresponding connectors on the SCSI backplane board.
See Figure 1-6 for the location of connectors on the 3.5-inch SAS backplane.
Replacing a 2.5-Inch SAS Backplane
CAUTION:
Any installation that requires removal of the system cover is intended solely to be performed by
trained service technicians. See your Product Information Guide for complete information about safety
precautions, working inside the computer, and protecting against electrostatic discharge.
Removing a 2.5-Inch SAS Backplane
1 Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.
2 Open the system. See "Opening the System" in the Installation and Troubleshooting Guide.
NOTICE:
To prevent damage to the drives and backplane, you must remove the SAS drives and diskette/optical
drive carrier from the system before removing the backplane. You must note the number of each hard drive and
temporarily label them before removal so that you can replace them in the same locations.
3 Remove all SAS hard drives. See "Removing a Hot-Plug Hard Drive" on page 9.
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1 SAS B 2 SAS A 3 backplane power