HP XP7 Storage - Manual (Page 120)

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When using I-2107 CU emulation type for the MCU when the host is online to the S-VOL, run
the CESTPAIR command to create a Cnt Ac-S Z pair requires ONLINSEC(YES). The operation
fails if you do not use ONLINSEC or if you use ONLINSEC(NO).
Note that you cannot check whether a host system is online if the RCU does not support I-2107
CU emulation type. In this case, you can still run the CESTPAIR command with
ONLINSEC(YES)
—if the MCU is XP7 and supports I-2107 CU emulation type.
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If the PPRCOPY SUSPEND command issued to a pair in Pending status is rejected, split the
pair using Remote Web Console.
WARNING! The CSUSPEND command QUIESCE option is disabled by APARs
OW15247/48. Make sure to check with your HP account team before using this command
and option on XP7. If the command and option is issued to certain volumes (for example,
active SPOOL, PAGE, or CATALOG datasets, active SYSRES volume), the attached host may
enter a deadlock condition, requiring storage control IML to correct the condition.
See APARs OW15247 or 48 and the latest IBM PPRC documentation for detailed information.
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Preserve Mirror FlashCopy function with Compatible FlashCopy: When you create Compatible
FlashCopy Preserve Mirror relationships in COPY mode, both copies are not synchronized.
If you issue Withdraw during the copy operation, both copies of the relationship are
suspended. Therefore, data consistency between the P-VOL and S-VOL is not ensured even
though the Cnt Ac-S Z pair is in DUPLEX mode. This status can be confirmed by the CQUERY
command.
The following figure provides an example of when CQUERY is issued to the Cnt Ac-S Z P-VOL
using the VOLUME parameter. The message, PAIR WAS THE TARGET OF A WITHDRAWN
PRESERVE MIRROR RELATION, displays. To release this status, delete the Cnt Ac-S Z pair. For
details about the Preserve Mirror FlashCopy function, see the HP XP7 for Compatible FlashCopy
Mirroring User Guide.
Conventions used in TSO commands
The following table shows typefaces and symbols used in PPRC TSO commands.
Example Description Typeface or Symbol
CESTPATH Used for command and keyword names or consoles. Normal text
ssid Used for parameters that are to be replaced by the appropriate
character or number string. Italic text
120 Pair operations using PPRC