Restoring data from a journal volume

Edit online

This topic provides information on restoring data from a journal (J) volume. It describes how to restore data from journal volume used as part of a DS8000 Global Mirror session, or as part of a Metro Global Mirror session, if data was corrupted on a host volume after you issued a Recover command. Following these steps will enable you to return to a consistent copy of the data on the host volume.

Perform the following steps to move the data from the journal volume back to the host volume:
Note: Follow these instructions only if you have already issued a Recover command to the site containing the journal volume. After the Recover command is issued, the journal volume will hold a copy of the consistent data at the time the command was issued.
  1. Outside of Copy Services Manager, using the DS8000® GUI /CLI, issue withdraw initiate background copy (issue a rmflash -cp command) on pairs containing the journal volume (for example, H2J2). This copies the remaining uncopied tracks from the host to the journal. Then, ensure all the Out of Sync (OOS) tracks reach zero.
  2. Create a separate FlashCopy® session either with Copy Services Manager, or with the DS8000 GUI /CLI (issue a mkflash command with background copy), with the following conditions:
    • The journal volume (Jx) is the source volume.
    • The host volume (Hx or Ix if using a session with Practice capabilities) is the target volume.
    • x is the site the Recover command was issued to.