Hitachi ShadowImage for z/OS user guide (HIT9503-96009, January 2008)

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 “Re
synchronizePairOperations(Normal,Quick,Reverse,QuickRestore)”onpage30
for important i
nformation 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 an
d TCz pairs share the same volume, to obtain the Siz pair status, query from the host:
• TVOLstatusoftheSizpairiftheSizS-VOLandTCzM-VOLsharethesamevolume,
• T-VOL status of the Siz pair if the Siz S-VOL and TCz R-VOL share the same volume, and
•S-VOLsta
tus 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 s
tatus for the Siz pair(s) with the other T-VOL(s), you must direct the host query to the
specificTVOLusingtheT-VOL’sLDEVIDinthehostcommand.TheSizremoteconsolesoftware
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 Table 10 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
00
Simplex
1
0SIzpairstatus
2ormore 0
SIz pair status for the pair whose T-VOL has the lowest LDEV
ID
0
1
TrueCopy for z/OS pair status
11
TrueCopy for z/OS pair status
2ormore
1
TrueCopy for z/OS pair status
Table Table 11 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