EMC® VNX5300™ Hardware Information Guide
80
EMC® VNX5300™ Hardware Information Guide
Stacked cabling
with seven DAEs in
VNX5300 Block
platform
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
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).
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)
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:
shows 4U of reserved space to allow for upgrading your 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.