HP Hitachi ShadowImage for Mainframe User Guide (T5213-96032, November 2011)

Table Of Contents
command. The SIz remote console software displays the LDEV ID and SIz pair status of all
T-VOLs associated with an S-VOL.
Reverse copy and quick restore operations can be performed on shared SIz/TCz pairs only
when the TCz pair is suspended.
Table 6 (page 29) describes the host pair status reporting for SIz volumes, TCz volumes, and
SIz/TCz shared volumes.
Table 6 Host Pair Status Reporting for SIz/TCz Shared Volumes
Pair Status Reported by Storage SystemNumber of TCz PairsNumber of SIz S-VOLs
Simplex00
SIz pair status01
SIz pair status for the pair whose T-VOL has the lowest
LDEV ID
02 or more
TCz pair status10
TCz pair status11
TCz pair status12 or more
Table 7 (page 29) lists the currency of the data on shared SIz/TCz volumes based on the SIz and
TCz pair status.
Table 7 Currency of a Shared SIz and TCz Volume
TCz Pair StatusSIz Pair Status
SuspendedDuplexPending
Not currentNot currentNot currentPending
CURRENTNot currentNot currentDuplex
CURRENTNot currentNot currentSP-Pending
CURRENTNot currentNot currentV-Split
CURRENTCURRENTCURRENTSplit
CURRENTNot currentNot currentResync
CURRENTN/AN/AResync-r
Not currentNot currentNot currentSuspended
Figure 10 (page 30) shows a volume that is functioning as both an SIz S-VOL and a TCz M-VOL.
This configuration allows you to:
Use ShadowImage for Mainframe to provide on-site backup copies of TCz M-VOLs, and/or
Use TCz to provide remote backup copies of SIz S-VOLs.
Hitachi TrueCopy™ for Mainframe 29