This integer holds the high-order 32 bits of a 64-bit counter of write requests not immediately serviced because the target data was still loading into cache, paired with the low-order cpqDaLogDrvCacheVolAccelNoOfWriteMissLoading value, and returns -1 if not applicable. An admin only consults this on extremely high-throughput cache volumes where the low-order counter would already have wrapped. For example, this remaining zero on a typical deployment just confirms the write loading-miss counter hasn't yet reached billions of events.