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

2OverviewofHitachi
ShadowImage™ for z/OS
Operations
Siz is a storage-based hardware solution for duplicating logical volumes which reduces backup time
and provides point-in-time backup. The Siz source volumes (S-VOLs) contain the original data, and the
Siz target volume(s) (T-VOLs) contain the duplicate data. You can make up to three copies of each
S-VOL. Since each T-VOL is paired with its S-VOL independently, you can maintain each T-VOL as an
independent copy set that can be split, re-synchronized, and deleted separately from the other T-VOLs
assigned to the same S-VOL.
This chapter covers the following topics:
• Siz Components (section ShadowImage for z/OS Components, page 17)
• Requirements for Using and Maintaining Siz (section
Requirements for Using and Maintaining ShadowImage for z/OS , page 21)
•
Siz Operations (section ShadowImage for z/OS Operations, page 25)
•
Siz Options (section ShadowImage for z/OS Operations,page25)
•
At-Time Split Function (section At-Time Split Function, page 40)
• Siz Pair Status (section Hitachi ShadowImage for z/OS Pair Status, page 42)
•
Cautions on Switching Off Power Supply (section Cautions on Switching Off Power Supply,page46)
• Cautions on Using XP10000 storage system (section
“Cautions on Using XP10000 Storage System” on page 47)
Hitach
i ShadowImage™ for z/OS Components
Siz ope
rations involve the S-VOLs and T-VOLs in the storage system, the Siz software hosted by Remote
Web Con
sole, and (optionally) the PPRC host software functions.
The Siz system components are:
•
Siz vol
ume pairs (S-VOLs and T-VOLs) (see section Volume Pairs (S-VOLs and T-VOLs) , page 18.
•
Siz software on Remote Web Console (section ShadowImage for z/OS Software, page 19).
•
Siz License (section Purchasing Volumes for Use with ShadowImage for z/OS,page19).
• (Optional) PPRC host software (section IBM PPRC Host Software Functions, page 21).
• (Opt
ional) HP StorageWorks for Business Continuity Manager software (see section
“Hitachi Business Continuity Manager” on page 14.
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