Use the startfcmap command to start
a FlashCopy mapping.
This command makes a point-in-time copy of the source volume at the
moment that the command is started.
Syntax
startfcmap [ { [ [ -prep ] [ -restore ] ] } ] { fc_map_id | fc_map_name }
Parameters
- -prep
- (Optional) Specifies that the designated mapping be prepared prior
to starting the mapping. A mapping must be prepared before it can
be started. When you use this parameter, the system automatically
issues the prestartfcmap command for the group
that you specify.
Note: If you have already used the prestartfcmap command,
you cannot use the -prep parameter on the startfcmap command;
the command fails. However, if the FlashCopy has
successfully prepared before, the startfcmap command
succeeds.
- -restore
- (Optional) Specifies the restore flag. When combined with the prep option,
this forces the mapping to be prepared even if the target volume is
being used as a source volume in another active mapping. An active
mapping is in the copying, suspended, or stopping state.
- fc_map_id | fc_map_name
- Specifies the ID or name of the mapping to start.
Description
This
command starts a single mapping, which results in a point-in-time
copy of the source volume. You can combine the restore parameter
with the prep parameter to force the mapping
to be prepared prior to starting, even if the target volume is being
used as a source volume of another active mapping. In this case, the
mapping is restoring as shown in the lsfcmap view.
If the restore parameter is specified when starting
a mapping where the target volume is not the source volume of another
active mapping, the parameter is ignored and the mapping is not restoring
as shown in the lsfcmap view.
If a mapping
is started and the target volume of the mapping being started has
up to four other incremental FlashCopy mappings
using the target, the incremental recording is left on. If there are
more than four other incremental FlashCopy mappings
using the target volume, the incremental recording for all of these
mappings is turned off until they are restarted.
Note: The startfcmap command
can take some time to start, particularly if you use the prep parameter.
If you use the prep parameter, you give additional
starting control to the system. The system must prepare the mapping
before the mapping is started. To keep control when the mapping starts,
you must issue the prestartfcmap command before
you issue the startfcmap command.
This command is rejected if the target
of the FlashCopy mapping
is the secondary volume in a Metro Mirror or Global Mirror relationship
(so that the FlashCopy target
is the remote copy secondary).
Note: If the remote copy is idling
or disconnected, even if the FlashCopy and
remote copy are pointing to the same volume, the auxiliary volume
is not necessarily the secondary volume. In this case, you can start
a FlashCopy mapping.
The FlashCopy mapping also fails
in the following cases, if the target of the FlashCopy mapping is the primary volume
in a Metro Mirror or Global Mirror relationship (so that the FlashCopy target is the remote
copy primary):
- The remote copy is active.
- The FlashCopy target
(and remote copy primary target) volume is offline. If this occurs,
the FlashCopy mapping
stops and the target volume remains offline.
Maps that are
rc_controlled are not shown in
the view when this command is specified.
Remember: If
the source volume is in an
active-active relationship
then the FlashCopy mapping
can only be started if the information on the source volume is current,
or an older copy to which access has been provided by specifying:
stoprcrelationship -access
A
current volume in an
active-active relationship is
the primary copy, or the secondary copy when the relationship's state
is
consistent_syncronized.
An invocation example
startfcmap -prep 2
The
resulting output:
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