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

may affect I/O performance. The Siz initial copy operation is performed only once to each T
VOL (unless the pair is suspended).
• Identify the volumes (LDEVs) that will be the Siz volumes. For each volume, write down the CU
image and LDEV ID, whether the volume will be an S VOL or T VOL, and the other volume(s) in
its pair (see Table 9 on page 50 for a sample table). The S VOLs remain fully accessible to all
hosts throughout normal Siz operations (except during reverse copy and quick restore). The T
VOLs must be varied offline before being reserved for Siz operations. Once assigned to a pair,
a T VOL rejects all write I/Os, except when the pair is split.
• Siz and TCz can function together in the same HP StorageWorks XP12000 storage
system to provide both internal and remote backup for your important data. If you are
planning to combine Siz and TCz, read the important configuration information in section
“Combining Hitachi ShadowImage for z/OS with Hitachi TrueCopy for z/OS (TCz)”onpage51.
Table 9 Sample Table-Siz Configuration Information
CU #
LDEV
S-VOL?
Associated
T-VOL(s)
T-VOL?
Associated
S-VOL
000
Yes
0:10, 0:11
No
—
001
Yes
0:12, 0:13
No
—
etc.
……………
00F
Yes
0:2E, 0:2F
No
—
010
No
—
Yes
0:00
0
11
No
—
Yes
0:00
012
No
—
Yes
0:01
etc.
……………
Combining Hitachi ShadowImage™ for z/OS with Other
Data Management Operations
Siz supports concurrent operations with the following data management functions:
•
Virtual LVI (see section “Combining Hitachi ShadowImage for z/OS with Virtual LVI”onpage50)
• Cache Residency Manager for z/OS (see section
“Combining Hitachi ShadowImage for z/OS with Cache Residency Manager” on page 51)
• TCz(seesection
“Combining Hitachi ShadowImage for z/OS with Hitachi TrueCopy for z/OS (TCz)”onpage51
•
Compatible Replication XRC (see section “Combining Siz with Compatible XRC”onpage54)
• Concurrent Copy (see section
“Combining Hitachi ShadowImage for z/OS with Concurrent Copy” on page 54)
• XP Auto LUN (see section
“Combining Hitachi ShadowImage for z/OS with XP Auto LUN” on page 55)
• Volume Security (see section
“Combining Hitachi ShadowImage for z/OS with Volume Security” on page 55)
• XP External Storage (see section
“Combining Hitachi ShadowImage for z/OS with XP External Storage” on page 55)
• URz(seesectionCombining Hitachi ShadowImage for z/OS with Universal Replicator for z/OS)
Combining Hitachi ShadowImage™ for z/OS with Virtual LVI
Virtual LVI volumes can be assigned to Siz pai
rs, provided that the T-VOL has the same capacity as the
S-VOL. If you need to perform Virtual LVI oper
ations on an existing Siz S-VOL or T VOL, you must delete
the pair first to return the volume to simplex
status.
50
Preparing for Hitachi ShadowImage for z/OS Operations