8464ch08_Migrate.fm Draft Document for Review February 7, 2020 3:15 pm GLYPH<SM590000> Copy Export and Copy Export Recovery/Merge: – Used for data migration from one TS7700T to another TS7700T cluster – Target TS7700T can be a stand-alone or part of a different grid – Does not involve host for data movement – Uses physical tape volumes to export data to target TS7700T GLYPH<SM590000> Grid to Grid Migration: – Used for data migration from a grid to another grid – Does not involve host for data movement – Does not use physical tape volumes GLYPH<SM590000> Cloud Based Migration: – Partition refresh for cloud migration  GLYPH<129> Requires modifying attributes of target virtual volumes in corresponding constructs  (storage group and storage class). GLYPH<129> Mount/demount operations are not needed for new attributes to be applied if the  library request command ( LI REQ PARTRFSH,<volser>,MMOUNT ) is used. – Cloud ghost copy processing:  GLYPH<129> Requires modifying copy mode attributes of target virtual volumes (management  class), and ensuring corresponding storage groups and storage classes in target  machine is properly configured to use the cloud storage tier. GLYPH<129> Data that existed in the cloud is recognized by the new machine without copying  data through grid links if library request command ( LI REQ  COPYRFSH,<volser>,CLDGHOST ) is used.  The following specific use cases are pertinent to the use of cloud storage tier: Virtual volumes that were originally stored in the resident cache partition (CP0) of the  TS7700C can be moved to a cache partition that is intended to use the Cloud Storage  Tier in the same cluster. Consider the following points: Data is premigrated to cloud storage tier by one cluster can be made accessible to a  newly joined TS7700C. Consider the following points: If data is moved inside the same grid (after a join of a cluster or a merge), COPYRFSH is the  preferred method. For more information, see “Population of a new cluster (COPYRFSH)” on  page 287. If data is moved from the Object Store in the cloud to another TS7700C (after a join or merge  of a new cluster), CLDGHOST is the preferred method. For more information, see  IBM  TS7700 R5.0 Cloud Storage Tier Guide , REDP-5573. This procedure requires the intervention of an IBM SSR. It is an option to upgrade from an  older TS7700T technology to a newer one, which provides benefits to the user in terms of  performance and more disk cache capacity. This operation implies the substitution of a “source” TS7700T by using a newer “target”, which  takes the role of the machine being replaced (from a grid perspective). If host-related feature  codes that are installed in the target machine are equivalent to the codes that are in the  original source machine, no configuration changes from the connected host side are required. A physical tape library that is attached to original source machine, and its entire inventory of  physical volumes, is kept for the new target TS7700T. 8.2.1 Frame replacement migration for TS7700T 300  IBM TS7700 Release 5.0 Guide