Hitachi MP-96RD625-01 manual Virtual LVI, Cache Residency Manager, ShadowImage for z/OS

Note*21: The volume can be used as a secondary data volume only when you restore a URz pair or perform a Business Continuity Manager YKRESYNC REVERSE operation. However, even in this case, you cannot use the volume as the secondary data volume of the URz pair for delta resync operation.

Note*32: This is "No" if more than one primary storage systems and more than one secondary storage system are used for remote copy (see section Using Multiple Primary and Secondary Storage Systems).

Virtual LVI

You can perform Virtual LVI operations on primary and secondary data volumes in URz pairs. If you need to perform Virtual LVI operations on a URz primary data volume or secondary data volume, you must delete the pair first to return the volume to Simplex status.

When creating a URz pair consisting of two Virtual LVI volumes, make sure that the primary data volume and the secondary data volumes have the same capacity.

Cache Residency Manager

You can perform Cache Residency Manager operations on URz primary data volumes and secondary data volumes.

ShadowImage for z/OS®

URz and ShadowImage for z/OS® (SIz) can be used together in the same storage system and on the same volumes to provide multiple copies of data at the primary and/or secondary sites. Table 3-12 describes the host pair status reporting for URz volumes, SIz volumes, and URz/SIz shared volumes. Table 3-13 shows the currency of the data on a shared URz/SIz volume based on URz and SIz pair status.

•For shared URz/SIz volumes, the URz pair status is reported to the host if you query the URz primary data volume or secondary data volume. To obtain the SIz pair status, query the target volume (T-VOL) of the SIz pair.

•SIz supports multiple T-VOLs for each source volume (S-VOL). If you issue a pair status query to a SIz S-VOL (e.g., pairdisplay), the status for only one SIz pair is reported (the pair with the T-VOL with the lowest LDEV ID). To obtain the pair status for the SIz pair(s) with the other T-VOL(s), you must direct the host query to the specific S-VOL using the T-VOL’s LDEV ID in the host command. The SIz remote console software displays the port, TID, LUN, LDEV ID and SIz pair status of all T-VOLs associated with a S-VOL.

Chapter 3 Preparing for Universal Replicator z/OS Operations 3-25

Hitachi Universal Replicator for IBM /OS User’s Guide