Site Planning Guide45
2. Rack Installation Specifications
This chapter provides the installation specification of the ETERNUS AX/HX.
Rack Installation Requirements
This section explains the requirements for installing the ETERNUS AX/HX in a 19-inch rack.
Placement in the Rack
Note the following when installing the ETERNUS AX/HX in the rack.
• Secure a space of 1U at the bottom of a rack.
• The space from 2U to 7U is dedicated to PDUs. Since the height of a PDU is 2U, a maximum of three PDUs can
be installed.
• Install the controller shelf in 8U.
• Drive shelves must be installed in a higher position than the controller shelf.
• If size of the drive shelves is mixture of 2U and 4U, the 4U shelves must be installed below the 2U shelves.
• The center of gravity must be taken into consideration to prevent a rack from toppling over. Shelves should
generally be installed from bottom to top to lower the center of gravity and to ensure the safe use of racks.
• Shelves are installed in the following order (from bottom to top).
Table 26 Shelf Installation Order
*1: Uninterruptible Power Supply.
• When an AX4100 or HX6100 is ordered together with a rack, drive shelves are installed according to the fol-
lowing priority.
Table 27 Priority of the Drive Shelf Types Connected to the AX4100
Installation order Shelf Size (height)
6 DS214C drive shelf 2U
DS224C drive shelf 2U
NS224 drive shelf 2U
5 DS460C drive shelf 4U
4 Controller shelf 2U
3 Controller shelf 4U
2 Power distribution unit 2U
1 UPS (*1) -
Priority Drive shelf
1 Drive shelf included in the controller shelf
2 A drive shelf that is different from the one included in the controller shelf
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