HP StorageWorks XP24000 User Manual page 33

Figure 12 SIz and TCz: Shared S-VOL / M-VOL and S-VOL / R-VOL
Figure 13 (page 33) shows a volume functioning as both an SIz T-VOL and a TCz M-VOL.
Figure 13 SIz and TCz: Shared T-VOL/M-VOL
The configuration in Figure 13 (page 33) 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 resynchronize the SIz pair. The TCz pair status cannot be changed when the
SIz pair is in the V-Split status.
You cannot distinguish the Split status from the V-Split status with the PPRC command. When you
use the SIz and TCz shared configuration shown in Figure 13 (page 33), you must either use the
PPRC command to perform the Steady Split operation, or use the Remote Web Console computer
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 details about the PPRC commands, see
"Performing ShadowImage for Mainframe Pair Operations Using PPRC" (page 93).
If a volume is shared with a SIz pair and a TCz pair, you can perform QuickRestore on the SIz
pair when the TCz pair is suspended. You cannot perform QuickRestore on the SIz pair when the
TCz pair is not suspended. Table 8 (page 34) shows whether you can perform QuickRestore when
a volume is shared with an SIz pair and a TCz pair.
Hitachi TrueCopy™ for Mainframe 33