When you set up 3DC cascade using
VSP Gx00 models or
VSP Fx00 models, one
VSP G800,
VSP F800,
VSP G1000,
VSP G1500, or
VSP F1500 is required for each site.
HUS VM is not supported in 3DC cascade configurations.
If a site has multiple storage system, 3DC cascade cannot be configured.
When managing the storage system with
CCI
only,
CCI
is recommended at all the sites.
When managing the storage system using
HDvM - SN,
Device Manager - Storage Navigator is required at all sites.
The primary site requires the following:
Host application
TC
TC primary volume (P-VOL), the primary production volume
The
TC P-VOL fence level (Primary Volume Fence Level) must be
Secondary Volume Data.
The intermediate site requires the following:
TC
UR
TC S-VOL =
UR P-VOL
UR master journal volume
The secondary site requires the following:
UR
UR S-VOL
UR restore journal volume
Differential data is used to resynchronize a suspended
TC or
UR pair.
When the
TC pair is resynchronized, the
UR pair in
PAIR or
COPY status is automatically split by the system.
