Sun Microsystems Virtual Tape Library - Manual (Page 31)

96267 • G Chapter 2 Understanding VTL Zoning 17
Port zoning (hard zoning)
A hard‐zoned SAN maps initiator to target using a physical port address. This port‐
to‐port zoning establishes a fixed, physical route through the SAN. So, since each
SAN zone can contain only one initiator and one target, you must provide two zones
for each initiating client. The figure below shows a hard‐zoned SAN before VTL
failover:
As the above figure shows:
■ one zone defines the path to the primary VTL server node
■
the other zone defines the path to the standby server.
Zo
ne
A
T
I
Client
SAN
Failed VTL server node
W
W
PN
2*
T
T
Active VTL server node A
Zone B
I
Client B
WWPN4 WWPN6
I
Active VTL server node B
Zone A
T
I
I
Client A Active VTL server node A
T
I
Standby VTL server node A
SAN
port2 port1
port3
Zone B
I
Client B
port5
port4 port6
Active VTL server node B
Standby VTL server node B
Zo
ne
C
Zo
ne
D
WWPN2