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HD3SS3415RUAT ISSUE

Project: Computer Board

OS: Linux

Question:

I have used the "HD3SS3415RUAT" for PCIE 3.0 switch in my solution.

I found that can't  detect the device when installed the "LSI9270" card(HDD RAID Card).

But other PCIE devices can be detected(LSI9260,LSI9240 etc.). Attached the schematic.

HD3SS3415RUAT-LT106.pdf

I need some help.....Thanks!