Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 74)

3. Connect any SCSI cables to the system before connecting the I/O cables.
4. Install the strain-relief bracket to the back of the system.
a. Insert the ends of the three long portions of the strain-relief bracket into the three matching holes in the rail
bracket (see Figure 7-6 ).
b. Secure the captive thumbscrew to the back of the system (see Figure 7-6 ).
5. Connect the I/O cables to the back of the system.
For information on routing system cables, see your Rack Installation Guide.
Figure 7-6. Installing the Strain-Relief Bracket
Installing a SCSI Backplane Daughter Card
To operate the SCSI backplane in a 2x3 split backplane configuration, you must install a daughter card.
CAUTION: Before you perform this procedure, you must turn off the system and disconnect it from its
power source. For more information, see " Safety First—For You and Your System " in "Troubleshooting
Your System."
CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System
Information document.
NOTICE: Before installing a SCSI backplane daughter card, back up your data to prevent data loss.
NOTE: Your system supports two- or five-drive configurations. The two-drive configuration is supported with the 1x5
backplane configuration, and the five-drive configuration is supported with the 2x3 backplane configuration. Upgrading
to a five- drive configuration requires that you add a SCSI backplane daughter card.