HP StorageWorks XP Remote Web Console Software - Manual (Page 53)

Figure 20 Siz and TCz: Shared T-VOL/M-VOL
•
This configuration does not allow Siz and TCz to copy at the same time. Add the Siz pair first, and
then split the pair before creating the TCz pair. You must suspend the TCz pair in order to resync
the Siz pair. The TCz pair status cannot be changed when the Siz pair is in the V-Split status.
• When you use the Siz and TCz shared configuration, you must either use the PPRC command
to perform the Steady Split operation, or use the Remote Web Console to confirm the pair
statuses. You can perform the Steady Split operation by specifying the CSUSPEND parameters
(Byte 7 = ‘M’, Byte 8 = ‘P’, Byte 9 = ‘S’). For more information about the PPRC commands,
see Chapter 5 on page 99.
Usually TCz and URz can share the volumes with Siz. However, in some cases, you cannot create Siz
pairs using the volume shared with TCz and URz.
NOTE:
A primary volume (P-VOL) of URz means a primary data volume of URz. A secondary volume (S-VOL)
of URz means a secondary data volume of URz.
The following configuration shows an example of a volume functioning as both an URz S-VOL and a TCz
M-VOL. In this configuration, you cannot use this volume as the S-VOL of a Siz pair.
Hitachi ShadowImage for z/OS user guide 53