Hitachi G200 - Configurations with Shadowimage S-Vols

In this configuration, you can only delete TC pairs when the SI P-VOL
status is RCPY. The following table shows possibilities of TC pair
operations according to the SI P-VOL status.
SI P-VOL
status
TC pair operations
Create Split Resync Delete
Switch operations
between the primary
and secondary sites
(horctakeover)
COPY(PD)/
COPY
COPY(SP)/
COPY
COPY(RS)/
COPY
Yes* Yes Yes Yes Yes
PAIR Yes* Yes Yes Yes Yes
PSUS(SP)/
PSUS
Yes* Yes Yes Yes Yes
PSUS
PSUE
Yes* Yes Yes Yes Yes
COPY(RS-
R)/RCPY
No No No Yes No
* If the TC P-VOL and TC S-VOL are DP-VOLs, the TC S-VOL cannot be used as the
SI P-VOL.
Configurations with ShadowImage S-VOLs
In the following figure, a SI S-VOL also functions as a TC P-VOL. This
configuration requires that the SI pair is split before the TC pair is created.
Figure 4-4 Shared SI S-VOL with TC P-VOL
In this configuration, before creating a TC pair, you must set the SI pair in
the PAIR status, split the SI pair, and then set it in the PSUS status. The
following table shows possibilities of TC pair operations according to the SI S-
VOL status.
4-10
Sharing TrueCopy volumes
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models