HP Hitachi TrueCopy for Mainframe User Guide (T5211-96014, November 2011)

Mainframe/ShadowImage for Mainframe volume based on TrueCopy for Mainframe and
ShadowImage for Mainframe pair status.
For shared TrueCopy for Mainframe/ShadowImage for Mainframe volumes, the TrueCopy
for Mainframe pair status is reported to the host if you query the TrueCopy for Mainframe
R-VOL. To obtain the ShadowImage for Mainframe pair status, query from the host:
The ShadowImage for Mainframe T-VOL status of the ShadowImage for Mainframe pair
if the ShadowImage for Mainframe S-VOL and TrueCopy for Mainframe M-VOL share
the same volume
The ShadowImage for Mainframe T-VOL status of the ShadowImage for Mainframe pair
if the ShadowImage for Mainframe S-VOL and TrueCopy for Mainframe R-VOL share the
same volume
The ShadowImage for Mainframe S-VOL status of the ShadowImage for Mainframe pair
if the ShadowImage for Mainframe T-VOL and TrueCopy for Mainframe M-VOL share
the same volume.
ShadowImage for Mainframe supports multiple target volumes (T-VOLs) for each source volume
(S-VOL). If you issue a pair status query to a ShadowImage for Mainframe S-VOL (for example,
CQUERY), the status for only one ShadowImage for Mainframe pair is reported (the pair with
the T-VOL with the lowest LDEV ID). To obtain the pair status for the ShadowImage for
Mainframe pair(s) with the other T-VOL(s), you must direct the host query to the specific T-VOL
using the T-VOL's LDEV ID in the host command (for example, CQUERY DEVN parameter).
The ShadowImage for Mainframe software displays the LDEV ID and ShadowImage for
Mainframe pair status of all T-VOLs associated with an S-VOL.
Table 20 Host Pair Status Reporting for TrueCopy for Mainframe/ShadowImage for Mainframe
Shared Volumes
Pair Status Reported by XPNumber of ShadowImage for
Mainframe T-VOLs
Number of TrueCopy for Mainframe
Pairs
Simplex00
ShadowImage for Mainframe pair
status
10
ShadowImage for Mainframe pair
status for the pair whose T-VOL has the
lowest LDEV ID
2 or more0
TrueCopy for Mainframe pair status01
TrueCopy for Mainframe pair status11
TrueCopy for Mainframe pair status2 or more1
Table 21 Data Currency of a Shared TrueCopy for Mainframe/ShadowImage for Mainframe Volume
SIz Pair StatusTrueCopy
for
SuspendResync-RResyncSplitV-SplitSP-PendDuplexPending
Mainframe
Pair Status
Not current--Not currentCURRENTNot currentNot currentNot currentNot currentPending
Not current--Not currentCURRENTNot currentNot currentNot currentNot currentDuplex
Not currentCURRENTCURRENTCURRENTCURRENTCURRENTCURRENTNot currentSuspend
“TrueCopy for Mainframe and ShadowImage for Mainframe: Shared M-VOL/S-VOL” (page 55)
through TrueCopy for Mainframe and ShadowImage for Mainframe: Shared M-VOL/T-VOL
(page 57) show the various TrueCopy for Mainframe/ShadowImage for Mainframe configurations
that share volumes. TrueCopy for Mainframe supports synchronous and asynchronous operations
54 About TrueCopy for Mainframe Operations