EMC VNX5700 - Page 97

VNX5700 DAE cabling
VNX5700 Hardware Information Guide 99
situation, the first rack would have nine DAEs (reserving 6U of space for File hardware).
The second rack would have thirteen DAEs. And, the third and final rack would have
eleven DAEs for a total DAE count of thirty-three having a disk drive count of 495.
The SAS ports on the 6-Gb/s SAS I/O module in each SP of the VNX5700 platform SPE are
labeled 0 and 1.
In Figure 87 on page 100, notice that each DAE device supports two completely redundant
buses (LCC A and LCC B).
Since twenty DAEs are available for a maximum of 500 disk drives, it is recommended that
the DAEs be load balanced. To do this, it is recommended that you daisy-chain the DAEs
for the most efficient load balancing. So, in Figure 87 on page 100, two buses (Bus 0 and
Bus 1) are available.
The cables shown in Figure 87 on page 100 are:
Note: The cable colors shown in the example are orange for Bus 0 and blue for Bus 1.
◆ Cable 1, orange, 6-Gb/s SAS I/O module port 0 (SP A) to 1
st
DAE (labels SP A A0 Port 0
to LCC A)
◆ Cable 2, orange, 6-Gb/s SAS I/O module port 0 (SP B) to 1
st
DAE (labels SP B B0 Port 0
to LCC B)
◆ Cable 3, blue, 6-Gb/s SAS I/O module port 1 (SP A) to 2
nd
DAE (labels SP A A0 Port 1 to
LCC A)
◆ Cable 4, blue, 6-Gb/s SAS I/O module port 1 (SP B) to 2
nd
DAE (labels SP B B0 Port 1
to LCC B)
The remaining cables are daisy-chained for load balancing. So, the orange cable for Bus 0
is interleaved and daisy-chained through the remaining DAEs:
◆ EA 1/Bus 0
◆ EA 2/Bus 0, and continue interleaving the DAEs up to EA 9/Bus 0.
While the blue cable for Bus 1is interleaved and daisy-chained through the remaining
DAEs:
◆ EA 1/Bus 1
◆ EA 2/Bus 1, and continue interleaving the DAEs up to EA 9/Bus 1.
Note: Figure 87 on page 100 shows 6U of reserved space to allow for upgrading your
VNX5700 Block to VNX5700 File/Unified platform. If you are planning to upgrade your
Block platform to a File/Unified platform, it is recommended that at least 6U of rack space
be reserved for adding one to two Controls Stations and one to two Data Mover
enclosures.