This read-only integer reports the operations-per-second threshold above which excessive disk (sDskOpSec) traps begin firing for a specific disk; a value of 0 means the system default limit (sCfgDskOps) is used instead, unless that default is also zero, in which case operations-per-second traps are effectively disabled. An administrator checks it to understand which disks have a custom I/O-rate alert threshold versus relying on the system-wide default. For example, a critical disk listed in the critical disk file might show a lower sDskTrapOpSec than the system default, so it alerts sooner under heavy I/O.