Figure 50 overlap of copy source extents, 50 overlap of copy source extents – HP XP Business Copy Software User Manual
Page 105
ShadowImage for z/OS user guide 105
To perform volume copying, the capacity of the copy source extent must be equal to or larger than the
capacity of the copy target extent. To perform dataset copying, the number of tracks of the copy source
extent and the copy target extent must be the same. Dataset copying allows you to establish up to 16
relationships to the copy source extent.
•
FlashCopy Mirror Version 2 can perform dataset copying when:
• The position of the copy source extent is different from the position of the copy target extent.
• The volume of the copy source extent is different from the volume of the copy target extent.
• The copy source extent and the copy target extent are in the same volume, provided that they do not
overlap.
• The data in a single source extent is to be copied simultaneously to multiple target extents.
• Volume copying is also performed simultaneously in the same sourced volume.
• Two source extents overlap, or one of them is an inclusive part of the other (see
), provided
that the number of overlapping extents in each overlapped area is not more than 16 extents.
Figure 50
Overlap of Copy Source Extents
•
FlashCopy Mirror Version 2 cannot perform dataset copying when:
• Any one of the copy target extents is overlapping a copy source or target extent.
• A copy target extent that already has a relationship established is used to establish a new
relationship with a copy source or target extent that overlaps.
shows the compatibility between the FlashCopy Mirror Version 2 functions and the user interface
functions.
Table 46
Compatibility between FlashCopy Mirror Version 2 and User Interface Functions
Function
User Interface
TSO
DFSMSdss
ICKDSF
ANTRQST
Macro
Volume copy
Multi relationship
OK
OK
OK
OK
NOCOPY mode
OK
OK
OK
OK
COPY mode
OK
OK
OK
OK
Dataset copy
Multi relationship
OK
OK
NO
OK
NOCOPY mode
OK
OK
NO
OK
COPY mode
OK
OK
NO
OK
Copy mode
Multi relationship
OK
OK
OK
OK
Change to
NOCOPY mode
NO
NO
NO
OK
NOCOPY mode
Multi relationship
OK
OK
OK
OK
Change to
NOCOPY mode
OK
NO
OK
OK