Hitachi ShadowImage for IBM z/OS User"s Guide (T5213-96002, June 2007)

Performing ShadowImage for z/OS Pair Operations Using PPRC 7-17
Hitachi ShadowImage™ for IBM
®
z/OS
®
User’s Guide
Displaying Pair Status Using PPRC Commands
The CQUERY TSO and PPRCOPY QUERY ICKDSF commands are equivalent to
the SIz pair status display and status & history functions.
ShadowImage for z/OS supports multiple T-VOLs for an S-VOL, and SIz and
TCz can both be defined for the same volume. When multiple pairs exist on
one volume, the CQUERY and PPRCOPY QUERY commands can only report the
status of one pair. Table 7-12 lists the status displayed by the host for the SIz
and/or TCz volume pair configurations.
• If the USP V contains only ShadowImage for z/OS pairs, the CQUERY and
PPRCOPY QUERY commands will report the ShadowImage for z/OS pair
status.
• If the USP V contains only TrueCopy for z/OS pairs, the CQUERY and
PPRCOPY QUERY commands will report the TCz pair status.
• If the USP V contains both ShadowImage for z/OS and TrueCopy for z/OS
pairs, the CQUERY and PPRCOPY QUERY commands will report the TCz pair
status.
Note: To obtain the SIz pair status, issue the status command to the SIz
T-VOL or use the ShadowImage for z/OS remote console software to view
the SIz pair status.
• If an S-VOL has multiple T-VOLs, the status command will report pair
status for the pair whose T-VOL has the lowest LDEV ID. To obtain the
status of a ShadowImage for z/OS pair with one of the other T-VOLs, issue
the status command to the desired T-VOL.
Table 7-12 Pair Status Reported by the Host for Volumes in Multiple Pairs
Number of SIz Pairs Number of TCz Pairs Status Displayed by Host
0 0 SIMPLEX
1 0 SIz pair status
2 or more 0 SIz pair whose T-VOL has the lowest LDEV ID
0 1 TCz pair status
1 1 TCz pair status
2 or more 1 TCz pair status