A storage administrator needs to perform a gradual migration of large backup volumes and jobs to a
remote D2D system over time. Because this data is being replicated for the first time, the
administrator needs to populate the target device with all the relevant hash codes. Which method
should the administrator use to achieve this goal?

A.
using co-location

B.
using removable media

C.
seeding data over the WAN link

D.
setting initializer to migration

Explanation:

* prior to being able to replicate only unique data between source and target D2D, we must first
ensure that each site has the same hash codes or “bulk data” loaded on it – this can be thought of as
the reference data against which future backups are compared to see if the hash codes exist already
on either source or target. The process of getting the same bulk data or reference data loaded on
the D2D source and D2D target is known as “seeding”.
* Seeding is generally is a one-time operation which must take place before steady-state, low
bandwidth replication can commence. Seeding can take place in a number of ways:
/ Over the WAN link – although this can take some time for large volumes of data
/ Using co-location where two devices are physically in the same location and can use a GbE
replication link for seeding. After seeding is complete, one unit is physically shipped to its permanent
destination.
/ Using a form of removable media (physical tape or portable USB disks) to “ship data” between
sites.