8244 Some drives report a bogus reference temperature

*** 19,32 ****
   * CDDL HEADER END
   */
  /*
   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <assert.h>
  #include <errno.h>
  #include <libdiskstatus.h>
  #include <limits.h>
  #include <stdlib.h>
--- 19,32 ----
   * CDDL HEADER END
   */
  /*
   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  *
+  * Copyright 2017 RackTop Systems.
   */
  
  #include <assert.h>
  #include <errno.h>
  #include <libdiskstatus.h>
  #include <limits.h>
  #include <stdlib.h>
*** 1075,1086 ****
  
                  plen = lphp->lph_length +
                      sizeof (scsi_log_parameter_header_t);
          }
  
          if (reftemp != INVALID_TEMPERATURE && curtemp != INVALID_TEMPERATURE &&
!             curtemp > reftemp)
                  sip->si_dsp->ds_faults |= DS_FAULT_OVERTEMP;
  
          return (0);
  }
  
--- 1075,1091 ----
  
                  plen = lphp->lph_length +
                      sizeof (scsi_log_parameter_header_t);
          }
  
+         /*
+          * Take the reference temperature under advisory since it is often
+          * reported incorrectly.  If it's 40C or less we ignore it and only
+          * register a fault once the current temperature reaches above 60C.
+          */
          if (reftemp != INVALID_TEMPERATURE && curtemp != INVALID_TEMPERATURE &&
!             curtemp > reftemp && (reftemp > 40 || curtemp > 60))
                  sip->si_dsp->ds_faults |= DS_FAULT_OVERTEMP;
  
          return (0);
  }