HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual page 83

Source Device Reporting
From a source perspective, it is important to know if your cartridges have replicated successfully. From
each source device on the replication tab there is an "Event History" tab which displays all the
replication activity concerning that source in a time stamped Event History log. For the source library
configured in the example above, you can see the stages and times as each of the four mapped
cartridges is replicated. For the activity selected, the details are shown in the bottom of the screen
shot. Using this Event History you can determine how long a particular cartridge took to replicate,
average replication speed, and so on.
HP StorageWorks VLS and D2D Solutions Guide 83