HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual page 179

Target Device Replication Status
On the target device GUI you can check the replication status of each target virtual cartridge by
viewing "Slots" in a LAN/WAN replication targets. The "Last Successful Echo Copy" field shows the
date/time of the last successful replication operation. If the cartridge has never been replicated or is
in the middle of replicating the date/time is shown as "Unknown."
This target status information is very important in the event of a disaster because the source site
(including the source device) is destroyed and therefore the target device is the only available source
of information on what cartridges were replicated successfully. This information is needed because
when you restore from the target device you do not want to restore from cartridge in an "Unknown"
replication state because it could be half way through replicating or it could be obsolete data. You
can therefore use the "Last Successful Echo Copy" date/time to determine which target virtual cartridges
are safe to restore from.
Replication Job Status
On both the source and target device GUI, in the Automigration/Replication tab you can click on the
"Job Reporting" branch to view the active replication jobs. This allows you to monitor the progress
of the active jobs (with percentage complete indicators to monitor the actual replication transfer) and
you can also manually cancel any active jobs using the "Cancel" buttons.
Replication Job History
On both the source and target device GUI, you can use the replication "Job History" to view the active
and historical replication jobs. This can be used to monitor job successes and failures and also the
performance of the replication jobs. The "Start Time" and "End Time" represent the entire replication
job including preprocessing and postprocessing (so you can determine whether the entire replication
process is finishing on time), but the "Duration" and "Transfer Rate" represents just the delta data
(plus metadata) that is actually transferred from source to target device.
Given this provides a historical view, there will generally be multiple replication jobs for each virtual
cartridge. For example, each time a source virtual cartridge is appended/overwritten the cartridge
will be re-replicated each time, or if a replication was interrupted (e.g., by loading the cartridge into
a drive) then each time the job is restarted it will be a new job in the history. Interrupted jobs will
have a status of "Rescheduled" to indicate this.
The following screen shows an example of the job history on a target device but you can also view
the same information on the source device, and in the case of an active-active deployment you can
view both the outgoing and incoming jobs on a device that is both a source and a target:
HP StorageWorks VLS and D2D Solutions Guide 179