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

Table 59 Differences of copying process between IBM FlashCopy and HP compatible FlashCopy
(continued)
HP compatible FlashCopyIBM FlashCopyCompared item
Data can be copied from the Compatible
FlashCopy(R) pair S-VOL to T-VOL but not to the
Neither FlashCopy data nor PPRC
data can be copied.
Establishing a Cnt Ac-S Z
pair in NOCOPY mode
TCz R-VOL. In this state if you release thewhose M-VOL is a
Compatible FlashCopy(R) pair, the data of TCz
M-VOL and R-VOL will be different.
Compatible FlashCopy pair
T-VOL that you establish in
NOCOPY mode
Data can be copied from the Compatible
FlashCopy(R) pair S-VOL to T-VOL but not to the
-Establishing a Cnt Ac-J Z
pair in NOCOPY mode
URz S-VOL. In this state if you release thewhose P-VOL is a
Compatible FlashCopy(R) pair, the data of URz
P-VOL and S-VOL will be different.
Compatible FlashCopy pair
T-VOL that you establish in
NOCOPY mode
Comparison of processing in releasing relationships
The following table lists the differences of the relationship releasing process between IBM FlashCopy
and HP Compatible FlashCopy.
Table 60 Differences of relationship releasing process Between IBM FlashCopy and HP Compatible
FlashCopy
HP Compatible FlashCopyIBM FlashCopyCompared item
The command withdraws the copy targets of
relationships existing within the entire extents
The command withdraws the copy targets
of relationships existing within the extents
specified as the source, provided that:
FCWITHDR command
(DDSW = YES, XTNTLST
parameter specified) specified as the source. When the copy target
of the relationship is only partly included in the
• When the copy target of the relationship
is only partly included in the specified
specified extent, the command does not
withdraw the relationship.
extent, only the area that is included in
the extent is withdrawn.
Caution: If one of the following has been
performed, the creation of relationships may
fail:
• When only the central part of the copy
target of the relationship is included in
the specified extent, only the area that
• A scratch operation
is included is withdrawn. The remaining
area of the relationship is divided up.
• Deletion of datasets
• Volume initialization
Therefore, if any of these has been performed,
do either of the following:
• Use the FCWITHDR command to withdraw
the relationship.
• Wait until the background copy operation
finishes and the relationship disappears.
The command withdraws the copy targets of
relationships existing within the extents specified
The command withdraws the copy targets
of pairs existing within the extents specified
as the target, provided that:
FCWITHDR command
(DDSW = NO, XTNTLST
parameter specified) as the target. When the copy target of the
relationship is only partly included in the extent
• When the copy target of the relationship
is only partly included in the extent
specified as the target, the command does not
withdraw the relationship.
specified as the target, only the area
Caution: If one of the following has been
performed, the creation of relationships may
fail:
that is included in the extent is
withdrawn.
• When only the central part of the copy
target of the relationship is included in
• A scratch operation
the extent specified as the target, only
• Deletion of datasets
the area that is included is withdrawn.
The remaining area of the relationship
is divided up.
• Volume initialization
Comparison of processing in releasing relationships 99