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
- (Required) 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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