After marking these primary data volume tracks as modified, the primary storage system discards these journal data. This ensures that journal data lost during transmission to the secondary storage system are identified and marked.
•The journal data that reached the secondary storage system but have not yet been settled.
After marking these secondary data volume tracks as modified, the secondary storage system discards these journal data.
•The primary data volume records updated by
When a suspended URz pair is resumed (resynchronized), the contents of the secondary storage system’s cylinder/track bitmap are sent to the primary storage system and merged into the primary storage system’s bitmap. The primary storage system then performs the resync operation according to the merged bitmap. This ensures that all the tracks including the discarded journal data are resynchronized at this time.
Business Continuity Manager Support
The USP V storage systems on which URz is installed support the Business Continuity Manager commands. If the host system console issues the Business Continuity Manager commands to the USP V storage system, the URz pair operations can be performed. The Business Continuity Manager commands allow you to add pairs, suspend pairs, resume pairs, release pairs, monitor the pair status, add DKC, and delete DKC. Table
Chapter 2 About Universal Replicator Operations |
