[Bug 229371] LSI 9300-8e Controller JBOD Multipath not functioning

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229371

            Bug ID: 229371
           Summary: LSI 9300-8e Controller JBOD Multipath not functioning
           Product: Base System
           Version: 11.1-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: bugs at FreeBSD.org
          Reporter: lclements0 at gmail.com

Created attachment 194682
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=194682&action=edit
dmesg output

Doing a new FreeBSD build with an LSI 9300-8e HBA in IT mode. Firmware on HBA
flashed to latest available from Broadcom, 16.00.01.00. The FreeBSD server has
5 JBOD arrays hanging off of the HBA, with a total of 56 drives and what should
be a total of 112 paths. With mpr driver version 18.03.00.00-fbsd,
approximately 10-15 drives don't show up in camcontrol whatsoever. After
upgrading the driver to the latest mpr from Broadcom, version 20.00.00.00, I
can now see all 56 drives, but even though the mpr driver shows 112 paths,
FreeNAS isn't picking this up and is only displaying 79 total paths. I shot a
message over to Stephen McConnell, the original maintainer of the mpr(4) driver
for FreeBSD, and he suggested to me that this may be a middleware problem, as
the driver itself can see all 112 paths just fine, something must be going on
in between the driver and FreeBSD.

I've attached the latest dmesg output as a tar. Happy to provide any other
diagnostic information as necessary.

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