Continuing Role For Physical Tape; Reporting - HP 12000 Design Manual

Figure 50 VLS Initialization by Co-location
Co-location is practical if replication is being installed along with VLS technology from day 1. If
replication is being added to VLS already installed at different sites, WAN transfer is best for small
quantities of data and tape transfer for larger quantities of data. Again, for many-to-one or
active-active implementations, co-location is impractical and WAN transfer or tape transfer is best.
NOTE: With co-location initialization, you ship the initialized target device to the other site and
will have to change the target device TCP/IP address. In this case, you need to use the "Re-Manage
LAN/WAN Replication Target" task in the source device GUI to re-link the source to the target's
new address.

Continuing Role for Physical Tape

HP has insisted all along that virtual tape libraries and physical tape are not mutually exclusive
but complementary technologies. Replication makes disaster recovery easier and more automated
than ever before, but disk is not infallible and some astute users will still archive data to tape at
the disaster recovery site allowing three copies of the backup data. This is prevalent in industries
that have compliance or severe audit requirements. Physical tape also has a role to play in
replication setup (tape initialization/transfer) and in the recovery process (see
the VLS Target
play.

Reporting

You can view the replication status and history from both the source and target VLS devices.
Device), so do not disregard those tape libraries; they still have a valuable role to
Restore Directly from
VLS Replication Implementation 109