Greetings, We're experiencing a serious issue with our SAS 2008-based LSI controllers on our IBM POWER (ppc64le) machines. Under heavy 24/7 disk I/O, the controller generates: mpt2sas_cm0: log_info(0x3112043d): originator(PL), code(0x12), sub_code(0x043d) mpt2sas_cm0: log_info(0x3112043d): originator(PL), code(0x12), sub_code(0x043d) over and over. Eventually, the controller decides to drop the majority of the attached SAS enclosures, leading to a host stall where additional diagnostics cannot be gathered (no root disk attached any more). This is on Linux 4.18 (Debian), 64k page size, spinning rust SAS drives in multiple enclosures. The codes above don't seem to have any matches on Google; any hints from the Broadcom folks as to what might be wrong here? Thanks!
