This integer holds the high-order 32 bits of a 64-bit counter of write cache misses that triggered a data load from primary storage into the drive cache, paired with the low-order cpqDaLogDrvCacheVolAccelNoOfWriteMissDoLoad value, and returns -1 if not applicable. An admin only checks this high-order half on extremely busy cache volumes where the low-order counter has already wrapped. For example, this staying zero in most environments simply reflects the write load-miss counter not yet reaching the multi-billion range.