Bug 230557

Summary:	Dell PERC H730P MFI driver is installed should be MRSAS driver
Product:	Base System	Reporter:	Bob Martin <fbsd44>
Component:	kern	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	Closed FIXED
Severity:	Affects Some People	CC:	jSML4ThWwBID69YC
Priority:	---
Version:	11.2-RELEASE
Hardware:	amd64
OS:	Any

Description Bob Martin 2018-08-12 05:51:03 UTC

MFI driver is loaded on Dell System with PERC H730P host adapters. This is the incorrect driver. It should load the MRSAS driver instead.

While the MFI driver works in some cases, it will not work correctly if the adapter is in HBA mode and causes the system to panic if a raid0 with only one drive is present.

Comment 1 Bob Martin 2018-12-13 16:34:35 UTC

After much research, this bug has existed at least since 10.3-RELEASE.

As a temporary fix, add hw.mfi.mrsas_enable="1" to /boot/loader.conf

man 4 mrsas for details

Comment 2 jSML4ThWwBID69YC 2022-03-08 05:06:51 UTC

This seems unfixed on 13.0-RELEASE. 

I tested today on a Dell PowerEdge R340 with a PERC H730P Adapter (Embedded) controller. It loaded the MFI driver which caused the issues listed at https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239801. 

It also prevents installing FreeBSD with ZFS as the data started corrupting and caused a kernel panic before the installation completes. 

Loading the MRSAS driver works around the issue. For installation, I had to run 'set hw.mfi.mrsas_enable=1' at the boot loader prompt.