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

Table 60 Differences of relationship releasing process Between IBM FlashCopy and HP Compatible
FlashCopy (continued)
HP Compatible FlashCopyIBM FlashCopyCompared item
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.
Not supported. The command will finish
abnormally. Relationships will not be deleted.
The command will finish normally.
Relationships will not be deleted.
REMOVEFCPY (ICKDSF
CONTROL command)
Part of the volume relationship will be
withdrawn.
The operation when you
establish a dataset
• When you specify the source volume of a
volume relationship as the copy target, the
entire volume relationship will be withdrawn.
relationship by using
DFSMSdss command,
• When you specify the target volume of a
volume relationship as the copy target, the
volume relationship will be withdrawn.
and specified the source
or target volume of a
volume relationship as
the copy target
Caution: When only a part of the relationship
that is the copy target is included in the specified
extent as the copy target, the volume relationship
will not be withdrawn.
Comparison with Compatible FlashCopy SE
The following table shows the difference between IBM FlashCopy SE and Hitachi Compatible
FlashCopy SE.
Table 61 The difference between IBM FlashCopy SE and Hitachi Compatible FlashCopy SE
Hitachi product (Compatible FlashCopy SE)IBM productItem
The usage amount in the pool is managed
by the pages just as Dynamic Provisioning
Since usage amount in the pool is
managed by the tracks, you cannot write
when the pool is full.
Action when the pool is full
for Mainframe, and the usage amount as
TSE-VOL in the page is managed by the
tracks. When the pages cannot be
allocated newly because the pool is full,
you can write till the track in the page is
full.
After you change the T-VOL status of a
Compatible FlashCopy SE pair to online
After you change the T-VOL status of a
FlashCopy pair to online and then change
Changing volumes to online
and then change it to offline and executeit to offline and execute Fast Reverse
Fast Reverse Restore, you cannot changeRestore, you can change the new S-VOL
status to online. the new S-VOL status to online because the
data is not guaranteed.
Comparison of supporting commands
IBM FlashCopy supports the ICKDSF commands while HP Compatible FlashCopy partly supports.
However, if you execute the commands to a TCz M-VOL or SIz S-VOL that is in pending status, the
commands will end abnormally with CC=12. See “Requirements of Compatible FlashCopy SE”
(page 103) for details on how to avoid the abnormal ending. In addition, HP Compatible FlashCopy
does not support the following parameters of the TSO commands.
FC Establish command
• OPENDVCS
• MODE (ASYNC)
100 Feature comparison with IBM product