HP StorageWorks XP Remote Web Console Software - Manual (Page 43)

When you split XP Business Copy pairs, if a volume is shared with XP Continuous Access
Asynchronous and XP Business Copy, consider the following points (see
Figure 8 (page 42) ).
◦ Split the XP Continuous Access pair after you have changed the status of the XP Continuous
Access Asynchronous pair to PSUS or PSUE.
◦ If you split XP Continuous Access pairs for each consistency group, split the pairs after
you have changed the status of all XP Continuous Access synchronous pairs in the specified
consistency group to PSUS or PSUE. Also, make the consistency time (C/T) of the
consistency group equal to the C/T of each XP Continuous Access Asynchronous pair.
If you do not permit the XP Business Copy split operation under a condition that does not meet
the above points, set ON for the XP20000 Disk Array mode 697. The XP20000 Disk Array
mode 697 is the mode to check the aforementioned conditions. The default setting of the
XP20000 Disk Array mode 697 is OFF.
When you split XP Business Copy pairs for each consistency group, and if the XP20000 Disk
Array mode 697 is ON and the consistency group does not meet the above condition, the
status of the related XP Business Copy pairs may be PSUS or PSUE. Resynchronizing the
suspended pairs takes the same amount of time as performing the initial copy process.
For details about the XP20000 Disk Array mode 697, see Table 2 (page 11) .
Figure 9 (page 43) combines the configurations shown in Figure 7 (page 42) and
Figure 8 (page 42) . Within a single XP Continuous Access pair, the P-VOL and S-VOL are
both functioning as XP Business Copy P-VOLs, providing multiple copies at the primary and
remote sites.
Figure 9 Shared XP Continuous Access/XP Business Copy P-VOL with Shared XP Continuous
Access S-VOL/XP Business Copy P-VOL
•
Figure 10 (page 44) shows an example of an XP Business Copy S-VOL that is also used as
an XP Continuous Access P-VOL. This configuration requires that the XP Business Copy pair
be established in duplex mode (PAIR) and then split (PSUS) before the XP Continuous Access
pair is created.
Interoperability with Other Products and Functions 43