HP StorageWorks XP Remote Web Console Software - Manual (Page 89)

ShadowImage for z/OS user guide 89
NOTE: To use the following PPRC TSO commands, you must add the command names to the AUTHCMD
PARM of IKJTSOxx that is a member of SYS1.PARMLIB, because the system is protected by RACF Facility.
When the TSO command (FCESTABL command) is executed, only the extents specified by the EXTENTS
parameter are copied from the S--VOL to the T-VOL. For example, the following figure shows an example of
Table 40 PPRC TSO commands
ShadowImage -
FlashCopy Operation
PPRC TSO
Command
Function Restrictions
Add ShadowImage -
FlashCopy Pair
FCESTABL Establishes a relationship
between the source and
T-VOLs.
The specified volume must be simplex.
When the SSID boundary is 64-LDEV,
the S-VOL and T-VOL for ShadowImage
- FlashCopy must be established in the
same CU image and SSID.
Delete ShadowImage -
FlashCopy Pair
FCWITHDR Withdraws the relationship
of an existing
ShadowImage - FlashCopy
pair.
The specified volume must have an
established relationship. When the
SSID boundary is 64-LDEV, S-VOL and
T-VOL for ShadowImage - FlashCopy
must be established in the same CU
image and SSID. When S-VOL and
T-VOL are in the different SSIDs, delete
the relationship from the SI390 window
on the Remote Console PC.
Display ShadowImage -
FlashCopy Pair Status
FCQUERY Displays detailed pair
status information.
None.
Table 41 PPRC TSO command parameters
Command Parameter Description
FCESTABL SDEVN Source device number.
TDEVN Target device number.
MODE COPY = Data is copied in the background. Normally, the relationship ends
automatically after all of the data has been copied.
NOCOPY = Data is not copied in the background. It is necessary to issue
FCWITHDR command to delete the relationship specified with NOCOPY option.
Before ShadowImage - FlashCopy read/write processing actually starts, all of the
data in an accessed track of the S-VOL is copied to the T-VOL when one of the
following data access occurs:
1. Write data access to the extents of the S-VOL.
2. Write data access to the extents of the T-VOL.
3. Read data access to the extents of T-VOL.
The timing of ShadowImage - FlashCopy data copying is different from IBM
FlashCopy. IBM FlashCopy copies data when data in either the source or T-VOL is
updated.
ONLINTGT YES = The path group is not checked.NO = The path group is checked.
EXTENTS Extents specify the range of copy by CCHH. Up to five extents can be specified.
FCWITHDR SDEVN Source device number.
TDEVN Target device number.
FCQUERY DEVN Device number.