HP XP P9500 Storage - Manual (Page 31)

Sharing volumes in a 3-Cnt Ac-J DC cascade configuration
You can share BC volumes with Cnt Ac-J volumes in 3 DC cascade configurations. You can share
BC P-VOL and S-VOLs with Cnt Ac-J volumes, as shown in the following figure.
Figure 3 BC volumes in a 3-Cnt Ac-J DC cascade configuration
When associated with these configurations, BC pair operations are dependent on the pair status
of the Cnt Ac-J local-intermediate pair and the local-remote pair.
The following table shows the BC operations that you can perform when the P-VOL is shared with
Cnt Ac-J P-VOL at local site.
BC operations Cnt Ac-J
local-intermed. pair
status
Resync--Reverse Copy and Quick Restore Create, Split, Suspend, Delete,
Resync--Normal Copy, Quick Resync
NO YES PAIR or
COPY(PD)/COPY*
YES YES PSUS/SSWS
The following table shows the BC operations that you can perform when the S-VOL is shared with
Cnt Ac-J P-VOL at local site.
BC operations Cnt Ac-J local-intermed. pair status
Resync - all types Suspend, Delete Pair split Pair create
NO YES NO NO PAIR
NO YES NO NO COPY(PD)/COPY
YES YES YES NO PSUS/SSWS
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