I'm looking at the back of the UNITY 450F (Dell EMC Unity Hardware Architecture) - Section "Disk Processor Enclosure (DPE)" - and I can see that there are 2 fibre ports per SP (3) which I will connect one to each fibre switch, there are IO Module Slots (6) and I would like to know what can I do with these slots? Are they like extra connections I can make between the SPs and the fibre switches to increase the data bandwidth?
It's a very vague question. The config is different for every system. What ports you have available are mostly the choice of the customer.
What you can do with the slots depends if they are fibre or IP. If fibre, you can use them for block connectivity (hosts), RP, Sync rep (first FC port only in the system), etc..
For IP ports, you can use them for NAS traffic, iSCSI interfaces, async replication, and much more.
I would suggest that you go through the documentation and speak with your storage architect for determining the best way to use them.
Andre @ Dell EMC
basically there are two types of I/O modules
for backend connectivity there is a SAS module to attach additional disk shelves
for frontend connectivity there are various Fibre Channel and Ethernet cards
Just download the Unity Hardware Information Guide from support.emc.com - its has all the options
The two expansion slots (6) are described just below the picture
Each SP can have two IO modules installed to expand front end host connection. IO module installed on SPA should match what is installed on SPB respective slot. There cannot be a miss match. Following are the IO modules that Unity supports,
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