HP XP7 Storage User Manual
Page 30
Sharing a Compatible FlashCopy S-VOL and a Cnt Ac-S Z volume:
You must do the following when you share a Compatible FlashCopy S-VOL and a Cnt Ac-S Z
volume, or when you use the Remote Compatible FlashCopy function.
•
Specify only one Compatible FlashCopy T-VOL if the Compatible FlashCopy S-VOL is shared
with Cnt Ac-S Z S-VOL.
•
Specify the volume of the same emulation type and same capacity as the Compatible FlashCopy
S-VOL to Cnt Ac-S Z S-VOL if the Compatible FlashCopy S-VOL is shared with Cnt Ac-S Z
S-VOL.
•
Set the local mode (system option modes 20 and 190) to ON at the RCU.
Only your HP representative can change the system option mode settings on your HP XP7
Storage.
•
Use the volume whose emulation type is shown in
.
When you share a Compatible FlashCopy S-VOL and a volume of a Cnt Ac-S Z pair, the status of
the Cnt Ac-S Z pair must be either duplex, pending duplex, or suspend. However, if the shared
Cnt Ac-S Z volume is an S-VOL, there may be cases when you cannot create the Compatible
FlashCopy relationship. See the following table for details.
Table 9 Shared volume: Compatible FlashCopy S-VOL and Cnt Ac-S Z
Status of Cnt Ac-S Z pair
Shared Cnt Ac-S Z volume
Suspend
Pending Duplex
Duplex
OK
OK
1
OK
P-VOL
Cnt Ac-S Z
OK
No
2
OK
S-VOL
3
Notes:
1. If a Cnt Ac-S Z P-VOL is in pending status and you execute an ICKDSF command for Compatible FlashCopy, the
ICKDSF job will end abnormally with CC=12 error. For information on how to avoid that abnormal ending, see
2. You cannot establish the Compatible FlashCopy relationship, because the data consistency of the Compatible
FlashCopy T-VOL will not be ensured.
3. If you establish a Compatible FlashCopy relationship with the FREEZE option when the Compatible FlashCopy S-VOL
and Cnt Ac-S Z S-VOL are shared, the results of Compatible FlashCopy operations and Cnt Ac-S Z operations will be
as follows:
•
Results of Compatible FlashCopy operations
When the status of the Cnt Ac-S Z pair is Suspend, the command will end normally, and you can establish a
Compatible FlashCopy relationship. However, when the status of the Cnt Ac-S Z pair is either Duplex or Pending
duplex, the command will be rejected and you cannot establish a Compatible FlashCopy relationship.
•
Results of Cnt Ac-S Z operations
If a Compatible FlashCopy relationship is established with the FREEZE option, and when the Cnt Ac-S Z S-VOL is
in extended long busy (ELB) status, the command to create or resume a pair will be rejected. However, the command
to suspend or delete a pair will be executed normally.
When you use a Compatible FlashCopy S-VOL as the Cnt Ac-S Z S-VOL, configure the system as follows:
•
Connect the different hosts to the main storage system and remote storage system, or connect the host of the main
storage system to both the main and remote storage systems.
•
Use fibre-channel interface to connect the main storage system with the remote storage system.
However, the above-mentioned system configuration differs from the system configuration that is
used when IBM FlashCopy and PPRC are used in conjunction.
The following table describes whether Reverse Restore can be performed when you share a
Compatible FlashCopy S-VOL and a volume of a Cnt Ac-S Z pair.
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About Compatible FlashCopy