>Is there any possibility of doing actions that will improve the performance on writes? I understand the writing procedure from SQL Server would take more time than regular SQL select and that indexes are a factor, but if there is something I am missing, I would like to know about it.

The first point to investigate is the interweaving of the lock when writing ( SQL Profile is a basic start point ).
This depends on the database and application design, and the number of competing operations.

The time can be reduced by improving the hardware,
but the minimum value depends on the design.
One way to find the minimum is to use ( not in production ! ) a Cache RAM (PrimoCache) that hides the disk latency.
Then you can compare this benchmark with a RAID controller with DRAM cache and SSD storage.