An option to configure additional locations for the 32 non-primary filegroups.The non-primary filegroups can grow rapidly in size when you use single instance storage. For best performance you need to spread the non-primary
filegroups across multiple locations.
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Thanks for the link to that discussion ,it explained nearly everything
I have one more question. The 32 non-primary file group locations can potentially be configured on different disk for performance .I now understand those contain the SIS data of items but how does EV write to the different 32 locations ?
For example will it use the first one to commit SIS data for an item and then the second location for the next one ? Is it random ?