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Connecting multiple DS60 shelves to the DD9500
system
The cabling diagrams in this section show the maximum configurations for the DD9500 systems. Not all systems will have all the
disk shelves shown in the diagrams.
Some of the DS60 configurations described in the following sections also include ES30 shelves for DD Cloud Tier metadata, or
FS15 shelves for Metadata on flash.
Add shelf-to-shelf cables between shelves in a loop and to the controller as shown in the diagrams.
1. The recommended cabling for DD9500 systems with HA utilizes a maximum of three loops.
2. 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.
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
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
5. Use the cable management assembly to support and organize all cables from the DD9500 system.
Select the appropriate configuration from the following list, and connect the disk shelves to the Data Domain controller.
●
DD9500
on page 67
●
DD9500 with HA
on page 68
●
DD9500 with DD Cloud Tier (Single node)
●
DD9500 with DD Cloud Tier (HA)
●
DD9500 with ERSO
on page 74
DD9500
For a base DD9500 system:
Table 20. DD9500 with DS60
String (Loop) I/O - Port
1
I/O 6 - Port 0
1
I/O 2 - Port 1
2
I/O 3 - Port 0
2
I/O 2 - Port 0
3
I/O 6 - Port 1
3
I/O 3 - Port 1
4
I/O 2 - Port 2
4
I/O 3 - Port 2
5
I/O 6 - Port 3
5
I/O 3 - Port 3
Cable lengths shown are designed for Data Domain racks. Longer cables (up to 5M) can be used.
a.
on page 71
on page 72
Shelf Port
A controller port 0 of shelf V1.1
B controller port 0 of the highest number shelf in V1
A controller port 0 of shelf V2.1
B controller port 0 of the highest number shelf in V2
A controller port 0 of shelf V3.1
B controller port 0 of the highest number shelf in V3
A controller port 0 of shelf V4.1
B controller port 0 of the highest number shelf in V4
A controller HOST
port of the SSD shelf
B controller HOST
port of the SSD shelf
st
hop where data will be written. If the SSD
st
shelf of a chain.
Connect Cables and Power On
a
Length
2M
2M
2M
2M
2M
2M
2M
5M
2M
2M
67
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