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Connecting multiple ES30 shelves to the DD9800
system
The cabling diagrams in this section show the maximum configurations for the DD9800 systems. 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.
4. The SSD shelf counts towards the total number of shelves connected to the system.
5. Data Domain recommends installing the SSD shelf in the V1.1 positon, but if that is not possible, the shelf can be placed in a
different location in the rack so long as cables of sufficient length are available.
NOTE:
V1.1 is recommended for better performance because this will the 1
shelf is connected to the last enclosure in a chain, then each read/write request has to go through many hops, which
introduces latency issues when compared to when the SSD shelf is on the 1
6. Use the cable management assembly to support and organize all cables from theDD9800 system.
Select the appropriate configuration from the following list, and connect the disk shelves to the Data Domain controller.
●
DD9800
on page 56
●
DD9800 with HA (one rack)
●
DD9800 with HA (two racks)
●
DD9800 with DD Cloud Tier (Single node or HA)
●
DD9800 with ERSO
on page 63
DD9800
For a base DD9800 system:
Table 11. DD9800 with ES30
String
I/O - Port
(Loop)
1
I/O 3 - Port 1
1
I/O 2 - Port 0
2
I/O 3 - Port 0
2
I/O 6 - Port 1
3
I/O 2 - Port 1
3
I/O 6 - Port 0
4
I/O 3 - Port 3
4
I/O 2 - Port 2
5
I/O 3 - Port 2
5
I/O 6 - Port 2
6
I/O 2 - Port 3
56
Connect Cables and Power On
port of the lower shelf to the B controller HOST
port of lower shelf to the A controller EXPANSION
on page 58
on page 59
on page 61
Shelf Port
B controller HOST
A controller HOST
B controller HOST
A controller HOST
B controller HOST
A controller HOST
B controller HOST
A controller HOST
B controller HOST
A controller HOST
B controller HOST
st
hop where data will be written. If the SSD
st
shelf of a chain.
port of shelf V1.1
port of the highest number shelf in V1
port of shelf V2.1
port of the highest number shelf in V2
port of shelf V3.1
port of the highest number shelf in V3
port of shelf V4.1
port of the highest number shelf in V4
port of shelf V5.1
port of the highest number shelf in V5
port of shelf V6.1
port of the next higher
port of the next higher
a
Length
2M
2M
2M
2M
2M
2M
3M
3M
3M
3M
3M
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