Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 67)

document.
CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System
Information document.
NOTICE: To avoid possible data loss, back up all data on the hard drives before changing the SCSI configuration.
1. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
2. Pull the retention lever to slide the daughter card away from the SCSI backplane connector (see Figure 4-24 ).
3. Lift the card up and away from the tabs on the card guide above the drive bay (see Figure 4-24 ).
SCSI Backplane Board
The system contains a 3.5-inch diskette drive and a CD drive mounted on the CD/diskette drive tray that connects to the
controllers on the system board through the SCSI backplane board. The system also contains up to five 1-inch SCSI hard
drives that connect to a controller on the system board or a RAID controller card through the SCSI backplane board.
Removing the SCSI Backplane Board
CAUTION: Before you perform this procedure, read the safety instructions in your System Information
document.
CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System
Information document.
1. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
2. Remove the cover (see " Removing the Cover ").
3. Remove the control-panel cable cover (see " Removing the Control-Panel Cable Cover ").
4. Pull the system board tray straight back until it stops (see " Removing the System Board Tray ").
5. Remove the SCSI backplane daughter card if it is installed (see " Removing the SCSI Backplane Daughter Card ").
6. Remove the CD/diskette drive tray (see " Removing the CD/Diskette Drive Tray ").
7. Remove all hard drives (see " Removing a Hard Drive ").
8. Loosen the thumbscrew that secures the SCSI backplane board in the system (see Figure 4-25 ).
9. Slide the backplane board toward the right side chassis wall about 0.5 inch.
10. Lift the backplane board off of its grounding tabs.
11. Lift the backplane board and disconnect the control-panel cable from the board (see Figure 4-5 ).
12. Lift the backplane board out of the system board tray (see Figure 4-25 ).
Figure 4-25. Removing and Replacing the SCSI Backplane Board