EMC Celerra Command Reference Manual page 199

configuration must be built prior to initialization using the nas_cel
-create command.
On the destination Control Station in a MirrorView/S
active/passive configuration, use the -init option to specify the
name of the source Celerra Network Server.
On the Control Station of each Celerra Network Server in a
MirrorView/S active/active' configuration , use the -init option
to specify the name of the remote Celerra Network Server. The
active/active configuration is a bidirectional configuration in
which a Celerra can serve as both a source and destination for
another Celerra.
-activate
Executed from the destination Celerra Network Server using the
remote administration account, initiates a failover from the source to
the destination Celerra Network Server. The activation works as
follows:
If the source is available, the -activate swaps the
primary-secondary role for all mirrors in the MirrorView/S
device group and makes the destination LUNs read/write. The
standby Data Movers acquire the IP and MAC addresses, file
systems, and export tables of their source counterparts.
If the original source site is unavailable, the destination LUNs are
promoted to the primary role, making them visible to the
destination Celerra. The original source LUNs cannot be
converted to backup images; they stay visible to the source
Celerra, and the original destination site is activated with new
source (primary) LUNs only. If the source cannot be shut down in
a disaster scenario, any writes occurring after the forced
activation will be lost during a restore.
-restore
Issued from the destination Celerra Network Server using the remote
administration account, restores a source Celerra Network Server
after a MirrorView/S failover and fails back the device group to the
source Celerra Network Server.
The restore process begins by checking the state of the device group.
If the device group state is Local Only (where each mirror only has
the source LUN), the device group will be fully synchronized and
rebuilt before the failback can occur. If the device group condition is
fractured, an incremental synchronization is performed before the
failback occurs. Source devices are then synchronized with the data
The nas Commands
199
nas_mview