This integer holds the low-order 32 bits of a 64-bit counter of read cache misses caused by the primary LUN being actively written to at the time, paired with the high-order cpqDaLogDrvCacheVolAccelNoOfReadMissLockedH value, and returns -1 if not applicable. An admin watches this to identify read/write contention on the underlying primary storage that's forcing reads to bypass the cache. For example, a high cpqDaLogDrvCacheVolAccelNoOfReadMissLocked count during a batch update job indicates concurrent writes are frequently blocking cached reads of the same data.