Dell PowerVault 735N (Rackmount NAS Appliance) - Manual (Page 55)

Removing and Replacing Parts: Dell PowerVault 735N Systems Service Manual
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6. If the replacement hard-disk drive has no carrier, remove the hard-disk drive that you removed from its carrier:
a. Remove the four screws that secure the drive to the carrier (see Figure 13 ).
b. Remove the hard-disk drive from the carrier.
Figure 13. Removing the Hard-Disk Drive From the Carrier
1 Screws (4)
2 Hard-disk drive
3 Hard-disk drive carrier
To install a replacement hard-disk drive, perform the following steps:
1. Insert the replacement hard-disk drive into the carrier and install four screws to secure the hard-disk drive.
2. Open the handle on the carrier and install the replacement hard-disk drive and carrier into its slot. Close the handle until it engages the
front panel, locking the hard-disk drive in place.
3. Reinstall the hard-disk drive lock you removed in step 3 of the previous procedure.
4. If you removed the front bezel in step 2 of the previous procedure, reinstall it now.
NOTICE: When replacing the optional front bezel, ensure that the bezel is oriented so that its status indicators are positioned just
below the Dell nameplate in the center of the bezel.
SCSI Backplane Boards
The SCSI backplane board has connectors on the front that connect to the four hard-disk drives and to one SCSI backplane daughter card
(see
Figure 14 ). On the back side are connectors that connect to the SCSI interface cables that attach to either one of the system board SCSI
connectors or to an expansion card connector. One SCSI connector attaches to a SCSI device installed in the externally-accessible
peripherals bay, if installed. A DC power connector accepts a power cord from the PSDB.
Figure 14. SCSI Backplane
1 Thumbscrew
2 SCSI backplane board
3 Ultra3 SCSI cable
connectors (SCSIB)
4 System board data
cable connector
(PLANAR)
5 Power connector
(POWER2)
6 Ultra3 SCSI cable
connector (SCSIA)
7 Data cable connector to
the fifth hard-disk drive
backplane (SCSI ID 4)