Dell EMC Data Domain DD9300 System Installation And Storage Instructions page 50

Connecting ES30 shelves
The cabling diagrams in this section show maximum configurations. Not all systems will have all the disk shelves shown in the
diagrams.
Add shelf-to-shelf cables between shelves in a loop and to the controller as shown in the diagrams.
1. Cable from the B Controller EXPANSION
shelf.
2. Then cable from the A Controller HOST
shelf
3. There are no specific placement or cabling requirements for SSD shelves, or the metadata shelves for DD Cloud Tier
configurations. These shelves can be installed and cabled the same way as standard ES30 shelves. SSD shelves and DD
Cloud Tier metadata do not need to be cabled in a separate set from the other ES30 shelves.
For HA pairs, the primary and standby nodes use different cables to connect to ES30 shelves. The primary node uses cables for
ES30 host ports ( ), and the standby node uses cables for ES30 expansion ports (
DD9300 (single node, DD Cloud Tier, or ERSO)
DD9300 systems support a maximum of 28 shelves, divided into four sets of seven shelves.
NOTE: For configurations of 16 SAS shelves or less, do not exceed four shelves per set.
Table 8. DD9300 with ES30 cabling instructions
String I/O - Port
(Loop)
1 I/O 7 - Port 0
1 I/O 2 - Port 0
2 I/O 7 - Port 2
2 I/O 2 - Port 2
3 I/O 7 - Port 1
3 I/O 2 - Port 1
4 I/O 7 - Port 3
4 I/O 2 - Port 3
Cable lengths shown are designed for Data Domain racks. Longer cables (up to 5M) can be used.
a.
50 Connect Cables and Power On
port of the lower shelf to the B controller HOST
port of lower shelf to the A controller EXPANSION
Shelf Port
B controller HOST port of shelf V1.1
A controller HOST port of the highest number shelf in V1
B controller HOST port of shelf V2.1
A controller HOST port of the highest number shelf in V2
B controller HOST port of shelf V3.1
A controller HOST port of the highest number shelf in V3
B controller HOST port of shelf V4.1
A controller HOST port of the highest number shelf in V4
port of the next higher
port of the next higher
).
a
Length
2M
2M
2M
2M
2M
2M
3M
3M