8464ch09_Oper.fm Draft Document for Review February 7, 2020 3:15 pm Figure 9-67 shows the MCs options, including the Time Delayed option.  Figure 9-67 Modify Management Classes options The user can use the MCs table to create, modify, and delete MCs. The default MC can be  modified, but cannot be deleted. The default MC uses dashes ( -------- ) for the symbolic  name. The MCs table shows the following status information: GLYPH<SM590000> Name: The name of the MC. Valid characters for this field are A - Z, 0 - 9, $, @, *, #, and  %. The first character of this field cannot be a number. This field is the only field that  cannot be modified after it is added.  GLYPH<SM590000> Secondary Pool: The target pool in the volume duplication. If the cluster does not possess  a physical library, this column is not visible and the MI categorizes newly created SGs by  using pool 0.  GLYPH<SM590000> Description: A description of the MC definition. The value in this field must be 1 - 70  characters in length.  GLYPH<SM590000> Scratch Mount Candidate: Clusters that are listed under Scratch Mount Candidate are  selected first for scratch mounts of the volumes that are associated with the MC. If no  cluster is displayed, the scratch mount process selects among the available clusters in a  random mode.  GLYPH<SM590000> Retain Copy Mode: Whether previous copy policy settings on private (non-scratch) logical  volume mounts are retained.  Retain Copy mode prevents the copy modes of a logical volume from being refreshed by  an accessing host device if the accessing cluster is not the same cluster that created the  volume. When Retain Copy mode is enabled through the MI, previously assigned copy  modes are retained and subsequent read or modify access does not refresh, update, or  merge copy modes. This enables the original number of copies to be maintained. 456  IBM TS7700 Release 5.0 Guide