HP StorageWorks XP Remote Web Console Software User Manual
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Combining Hitachi ShadowImage™ for z/OS with Cache Residency Manager
Cache Residency Manager for z/OS volumes can be assigned to Siz pairs, and Cache Residency
Manager for z/OS operations can be performed on existing Siz S-VOLs and T-VOLs.
CAUTION:
See section “
Resynchronize Pair Operations (Normal, Quick, Reverse, Quick Restore)
for important information on performing quick restore operations on Cache Residency Manager for
z/OS volumes.
Combining Hitachi ShadowImage™ for z/OS with Hitachi TrueCopy™ for
z/OS (TCz)
TCz volumes can be assigned to Siz pairs, and Siz volumes can be assigned to TCz pairs.
NOTE:
Siz is recommended for intra-storage system copy operations. If Siz is not installed, TCz (synchronous
only) can be used to copy within the same HP StorageWorks XP12000 storage system. This TCz
configuration requires at least one fibre channel interface cable loop (minimum of two is recommended).
Siz and TCz can function together in the same HP StorageWorks XP12000 storage system or XP10000
storage system to provide both internal and remote backup for your important data.
•
When Siz and TCz pairs share the same volume, to obtain the Siz pair status, query from the host:
• T VOL status of the Siz pair if the Siz S-VOL and TCz M-VOL share the same volume,
• T-VOL status of the Siz pair if the Siz S-VOL and TCz R-VOL share the same volume, and
• S-VOL status of the Siz pair if the Siz T-VOL and TCz M-VOL share the same volume.
•
Siz supports multiple T-VOLs for each S-VOL. If you issue a pair status query to an Siz S-VOL, the
status for only one Siz pair is reported (the pair with the T-VOL with the lowest LDEV ID). To obtain
the pair status for the Siz 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. 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
on page 51 describes the host pair status reporting for Siz volumes, TCz volumes, and
Siz/TCz shared volumes.
Table 10 Host Pair Status Reporting for Siz/TCz Shared Volumes
Number of Siz S
VOLs
Number of TCz
Pairs
Pair Status Reported by HP StorageWorks XP12000
Storage System
0
0
Simplex
1
0
SIz pair status
2 or more
0
SIz pair status for the pair whose T-VOL has the lowest LDEV
ID
0
1
TrueCopy for z/OS pair status
1
1
TrueCopy for z/OS pair status
2 or more
1
TrueCopy for z/OS pair status
Table
on page 52 lists the currency of the data on shared Siz/TCz volumes based on the
Siz and TCz pair status.
Hitachi ShadowImage for z/OS user guide
51