Draft Document for Review February 7, 2020 3:15 pm 8464ch09_Oper.fm Storage Cache Cache to Copy The number of GiBs that are in the incoming copy queue of a remote  cluster, but are destined for the accessing cluster. This value is the  amount of data that is being held in cache until a copy can be made. This data set is visible only if the accessing cluster is part of a grid. Storage Cache Cache Hit The number of completed mount requests where data is resident in  the TVC. If two distributed library access points are used to satisfy a mount  with synchronous mode copy enabled, this count is advanced only  when the data is resident in the TVC for both access points. For this  reason, this data set is visible only if the accessing cluster is a  TS7700 Tape Attach, or is part of a grid that contains a TS7700  Tape Attach. Storage Cache Cache Miss The number of completed mount requests where data is recalled  from a physical stacked volume. If two distributed library access points are used to satisfy a mount  with synchronous mode copy enabled, this count is advanced when  the data is not resident in the TVC for at least one of the two access  points. For this reason, this data set is visible only if the accessing  cluster is a TS7700 Tape Attach, or is part of a grid that contains a  TS7700 Tape Attach. Storage Cache Cache Hit Mount  Time The average time (ms) to complete Cache Hit mounts. This data set  is visible only if the accessing cluster is attached to a tape library. If  the cache is partitioned, this value is displayed according to  partition. Storage  Cache Cache Miss Mount  Time The average time (ms) to complete Cache Miss mounts.  This data set is visible only if the accessing cluster is attached to a  tape library. If the cache is partitioned, this value is displayed  according to partition. Storage Cache Primary Cache Total Physical Used The amount of used cache in a primary cache. If the cache is  partitioned, this value is the total physical cache that is used in all  partitions. Storage Cache Partitions Primary Used  If the accessing cluster is a TS7720 or TS7760 attached to a tape  library, a numbered tab exists for each active partition. Each tab  displays check boxes for the following categories: GLYPH<SM590000> Cache Hit GLYPH<SM590000> Cache Miss, GLYPH<SM590000> Mount Time Hit GLYPH<SM590000> Mount Time Miss GLYPH<SM590000> Data in Cache The amount of used cache in a partitioned, primary cache,  according to partition. This data set is only visible if the selected cluster is a TS7700T Storage Cache Data Waiting for  Premigration The amount of data in cache that is assigned to volumes that are  waiting for premigration. This data set is visible only if the selected cluster is a TS7700T. Metrics  section Metrics  category Data set Description Chapter 9. Configuring and operating the IBM TS7700  379