HP Surestore Disk Array 12h System Administrator's Guide for HP-UX, MPE, and W - Page 69

HP-UX Using the ARM Command Line Utilities for HP-UX Viewing the Disk Array General Configuration Settings Parameter Force Unit Access Response Disable Read Hits Resiliency Threshold Default Setting 2 FALSE 4 Description Controls the array's response to the FUA bit. The FUA bit is a command from the host when Write Cache is enabled. It gives the host an opportunity to flush write cache on command: If this field is 0, then the FUA bit is ignored. If this field is 1, then the FUA bit in a write command disables immediate report on the write and all write cache data for the involved LUN will be flushed. If this field is 2, then the FUA bit in a write command disables immediate report on the write and all write cache data for the involved LUN will be flushed along with the map journal before completing the write request. If NVRAM use is disabled due to the chosen map resiliency mode, then this field is ignored. Controls the array's ability to satisfy read commands from write cache contents during FUA processing. If NVRAM use is disabled due to the chosen map resiliency mode, then read data is never satisfied out of write cache. Specifies the maximum time between delivery of the response to a write command to the host, and initiation of associated writes out of write cache and map journal to disks. This time is specified in seconds. This maximum time is submitted to the scheduler for implementation. Depending on the priority of other events in the scheduler, the desired time may not be implemented. If NVRAM use is disabled due to the chosen map resiliency mode, then this field is ignored. The 0 value of this field is not the same as disabling NVRAM use. A value of 0h indicates that no maximum time will be enforced and that no recovery image will be available. 69