Connecting DS60 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. The recommended cabling for HA uses a maximum of three loops.
2. There are no specific placement or cabling requirements for SSD shelves. These shelves can be installed and cabled the
same way as standard ES30 shelves.
3. The SSD shelf counts towards the total number of shelves connected to the system.
4. 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
st
hop where data will be written. If the SSD
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
st
shelf of a chain.
5. Use the cable management assembly to support and organize all cables.
DD6800
Table 11. DD6800 with DS60 cabling instructions
String
(Loop)
I/O - Port
Shelf Port
Length
1
I/O 7 - Port 0
A controller port 0 of shelf V1.1
2M
1
I/O 2 - Port 0
B controller port 0 of the highest number shelf in V1
2M
2
I/O 7 - Port 1
A controller port 0 of shelf V2.1
2M
2
I/O 2 - Port 1
B controller port 0 of the highest number shelf in V2
2M
3
I/O 7 - Port 2
A controller port 0 of shelf V3.1
2M
3
I/O 2 - Port 2
B controller port 0 of the highest number shelf in V3
2M
a.
Cable lengths shown are designed for Data Domain racks. Longer cables (up to 5M) can be used.
54
Connect Cables and Power On