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Chapter 8: Advanced Volume Operations 8-3
Copying a Volume (Off-line Copy)
Data from any volume type can be replicated offline using the CLI command
volume copy create. Off-line replication is faster than on-line replication
but both the source and destination volumes must be off-line which can create
an interruption of service to the volume host(s). Because snapshot volumes are
internal (off-line) volumes, this is a way of copying a snapshot volume.
volume copy create
SWITCH PARAMETER DEFINITION STATUS EXAMPLE
-src
SOURCE ALIAS OF SOURCE
VOLUME TO COPY
MANDATORY
ScienceLab
-dst
DESTINATION ALIAS OF VOLUME
TO COPY TO
MANDATORY
ScienceLabII
volume copy create –src ScienceLab –dst ScienceLabII
Synchronizing a Volume
You cannot execute
another volume
operation while a
volume synch
operation is
underway on any
volume in a
hierarchy. This
includes a snapshot
operation.
If one child of a mirrored volume, the source, already contains data, the
data can be replicated to the second child, the destination, using the CLI
command volume mirror sync. This can be done on-line while the
source volume is still exposed or off-line while both the source and
destination volumes are unexposed. See how to expose volumes Chapter 7
“Volume Exposure and Security”. On-line data replication is slower but
allows the source volume to remain on-line with no interruption of service
to the volume host(s). Off-line replication is faster than on-line replication
but both the source and destination volumes must be taken off-line which
can create an interruption of service to the volume host(s).
See the working example of off-line data replication in Appendix A
“Replicating Data Off-line”.