EMC VNX Series Hardware Information Manual page 91

Stacked cabling with seven DAEs in VNX5300 Block platform
Figure 79 on page 92 shows a third example of a VNX5300 Block platform with seven
DAEs (all are 3U, 15 disk drive DAEs) or a VNX5300 platform with a total of 120 disk drives
(with the DPE a 3U, 15 disk drive device). This example shows the stacked cabling with
one 40U rack having seven DAEs.
In this example, as described previously, the SAS ports on the VNX5300 platform 3U DPE
are labeled 0 and 1. SAS 0 is connected internally to the SAS expander that connects to
the internal DPE disks. However, since seven DAEs are available for a maximum of 120
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 79 on page 92, two buses (Bus 0 and Bus 1) are available.
The cables shown in Figure 79 on page 92
Note: The cable colors shown in the example are orange for Bus 0 and blue for Bus 1.
Cable 1, blue, DPE to 1
◆
Cable 2, blue, DPE to 1
◆
Cable 3, orange, DPE to 5
◆
Cable 4, orange, DPE to 5
◆
So, the blue cable for Bus 1 is stacked and daisy-chained through the remaining DAEs:
EA 1/Bus 1
◆
EA 2/Bus 1
◆
EA 3/Bus 1
◆
While the orange cable for Bus 0 is stacked and daisy-chained through the remaining
DAEs:
EA 2/Bus 0
◆
EA 3/Bus 0
◆
Note: Figure 79 on page 92
VNX5300 Block to VNX5300 File/Unified platform. If you might be planning to upgrade
your Block platform to a File/Unified platform, it is recommended that at least 4U of rack
space be reserved for adding one to two Controls Stations and one Data Mover enclosure.
are:
st
DAE (labels SP A SAS 1 to LCC A)
st
DAE (labels SP B SAS 1 to LCC B)
th
DAE (labels SP A SAS 0 to LCC A)
th
DAE (labels SP B SAS 0 to LCC B)
shows 4U of reserved space to allow for upgrading your
EMC VNX5300 Hardware Information Guide
VNX5300 DAE cabling
91