EMC VNX Series Hardware Information Manual page 97

Stacked cabling in a VNX5300 File/Unified platform with seven DAEs
Figure 82 on page 98 shows an example of a VNX5300 File/Unified platform with seven
DAEs (all are 3U, 15 disk drive DAEs) or a VNX5300 File/Unified 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, 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
two buses (Bus 0 and Bus 1) are available with the first DAE on Bus 1 designated as
EA0/Bus 1 (blue cable). The fifth DAE continues Bus 0 and is designated as EA1/Bus 0
(orange cable) where it is then daisy-chained to the sixth DAE designated as EA2/Bus 0
and then to the seventh DAE designated as EA3/Bus 0, and so on.
The cables shown in Figure 82 on page 98
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
◆
The remaining cables are daisy-chained for load balancing. So, the blue cable for Bus 1 is
interleaved 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 interleaved and daisy-chained through the remaining
DAEs:
EA 2/Bus 0
◆
EA 3/Bus 0
◆
Note: In Figure 82 on page 98
two SPs), two CSs, a DME (with two DMs), and seven 3U 15 DAEs.
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)
the VNX5300 File platform shows an dual SPS, a DPE (with
EMC VNX5300 Hardware Information Guide
VNX5300 DAE cabling
Figure 82 on page 98,
97