Interleaved cabling with seven DAEs in a VNX5300 Block platform
Figure 78 on page 90
shows a second 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).
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 fare available or 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 78 on page
90, two buses (Bus 0 and Bus 1) are available.
The cables shown in
Figure 78 on page 90
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 2
◆
Cable 4, orange, DPE to 2
◆
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:
Figure 78 on page 90
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)
nd
DAE (labels SP A SAS 0 to LCC A)
nd
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
89