Connecting Multiple Expansion Shelves - EMC EMC2 DATA DOMAIN DD660 Installation And Setup Manual

connecting Multiple Expansion Shelves

ExPanSion SHElF cablinG
Multiple expansion shelves are connected together and to the controller with
qualified SAS cables. See the illustrations in this section that show the cabling
for several system configurations.
4 Use a SAS cable with a SFF-8088 (mini-SAS) connector to connect to the
SAS port on the controller and use a SFF-8470 connector to connect to
the ES20.
4 Use a SAS cable with two SFF-8470 connectors to connect one ES20 to
another ES20.
NOTE: The SFF-8470 supports a combination of 8 TB and 16 TB shelves, with a
maximum of 24 TB of externally attached raw storage, plus 12 TB of internal raw
storage.
IMPORTANT: The SAS connectors must be secured with their screw lock assem-
blies. The screw locks ensure a robust mechanical connection and are essential to
avoid cable stress at the solder joints of the connector.
The following configurations are possible:
4 No expansion shelf
4 Up to three 8 TB ES20s
4 One 16 TB ES20
4 One 16 TB ES20 and one 8 TB ES20
The order of connectivity does not matter.
Hot aDDition oF ExPanSion SHElvES
The system supports the hot addition of expansion shelves. Use the following
steps to add expansion shelves.
4 Install the new expansion shelf or shelves using the instructions in the
Install Hardware section, steps 1, 2, and 3.
FiGurE 6:
Multi-PatHinG
witH two SHElvES
FiGurE 7:
Multi-PatHinG
witH tHrEE SHElvES
addition of one ES20
4 Connect a SAS cable with a mini-SAS connector from slot 4A to the ES20
4 Connect a SAS cable with a mini-SAS connector from slot 3A to the ES20
addition of a Second ES20
4 Connect a SAS cable with a mini-SAS connector from slot 3B to the ES20
4 Connect a SAS cable with a mini-SAS connector from slot 4B to the ES20
addition of a third ES20
4 Disconnect the SAS cable from Controller B HOST port on the ES20 #1
4 Using a SAS cable with SFF-8470 connectors, connect one end to
4 Using a SAS cable with SFF-8470 connectors, connect one end to
Power up and Final configuration
4 Power on the expansion shelf or shelves using the instructions in the
4 Use the disk add enclosure command when ready to put the
Controller B Controller A
Controller B Controller A
Controller A HOST port.
Controller B HOST port.
(See Figure 6)
#2 Controller A HOST port.
#2 Controller B HOST port.
(See Figure 7)
and connect it to Controller A HOST port on ES20 #3.
Controller A EXP'N port on ES20 #3 and the other end to Controller B
HOST port on the ES20 #1.
Controller A EXP'N port on ES20 #1 and the other end to Controller B
HOST port on the ES20 #3.
Install Hardware section.
enclosure into use and expand the capacity of the system. The enclosure-
id is always 2 for the first added shelf, and 3 for the second. The Data
Domain controller always has the enclosure-id of 1 (one).
disk add enclosure enclosure-id
Shelf Installation Order
Controller
1
2
Shelf Installation Order
Controller
3
1
2
EMC DATA DOMAIN DD660 INSTALLATION AND SETUP GUIDE | SIDE 1