EMC® VNX5300™ Hardware Information Guide
86
EMC® VNX5300™ Hardware Information Guide
Stacked cabling in
a VNX5300
File/Unified platform
with seven DAEs
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 DPE are labeled 0 and 1.
SAS 0 is connected internally to the SAS expander that connects to the internal DPE
disks. However, since there are seven DAEs 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
, there are two buses (Bus 0 and Bus 1) 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
are:
Note:
The cable colors shown in the example are orange for Bus 0 and blue for Bus 1.
◆
Cable 1, blue, DPE to 1
st
DAE (labels SP A SAS 1 to LCC A)
◆
Cable 2, blue, DPE to 1
st
DAE (labels SP B SAS 1 to LCC B)
◆
Cable 3, orange, DPE to 5
th
DAE (labels SP A SAS 0 to LCC A)
◆
Cable 4, orange, DPE to 5
th
DAE (labels SP B SAS 0 to LCC B)
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:
the VNX5300 File platform shows an dual SPS, a DPE (with two
SPs), two CSs, a DME (with two DMs), and seven 3U 15 DAEs.