HP P9000 for Compatible FlashCopy Mirroring User Guide (AV400-96388, October 2011)

Figure 12 Dataset copying
Comparison of Results of Cnt Ac-S Z Pair operations
Cnt Ac-S Z pair operations sometimes produce different results depending on whether differential
data of the Cnt Ac-S Z pair are stored in units of tracks or cylinders. See the following table.
Table 2 Comparison of results of Cnt Ac-S Z pair operations
If differential data of the Cnt Ac-S Z pair
are stored in units of cylinders
If differential data of the Cnt Ac-S Z
pair are stored in units of tracks
Comparison Item
NoYesIs it possible to use Cnt Ac-S Z pair
volumes that are not suspended to
create Compatible FlashCopy
relationships?
Yes. However, you cannot
resynchronize a Cnt Ac-S Z pair when
YesIs it possible to use suspended Cnt
Ac-S Z pair volumes to create
Compatible FlashCopy relationships? a volume in the Cnt Ac-S Z pair is also
used as a Compatible FlashCopy
volume.
NoYesIs it possible to use Compatible
FlashCopy relationships to create Cnt
Ac-S Z pairs?
NoYesWill background copy be performed
if a Compatible FlashCopy
relationship has been created in
NOCOPY mode?
When the Compatible FlashCopy
relationship is copied in units of tracks.
When the Compatible FlashCopy
relationship is created.
When will differential data of the Cnt
Ac-S Z pair be updated?
Transition of Pair Synchronized is
different depending on whether the
data were stored in units of tracks or
cylinders.
Remote FlashCopy function
The Remote FlashCopy function allows you to perform operations on Compatible FlashCopy
relationships on the Cnt Ac-S Z remote storage system from the host connected to the Cnt Ac-S Z
main storage system.
Remote FlashCopy function 17