Features and Benefits of HSG80 ACS 8.6P Data Replication Manager

Features and Benefits of HSG80 ACS 8.6P Data Replication Manager 14
The FC-to-IP gateways do not have the same design limitations as FC-to-ATM gateways. The
DRM-to-IP solution is limited to the same 20 switch fabrics as DRM over direct fiber solutions,
which means that DRM over IP is currently limited to supporting up to 96 servers and 8 storage
arrays.
Initial versions of the FC-to-IP gateway support direct connection to at least one of the current
Ethernet protocols (10 Mbps, 100 Mbps, or 1 Gbps). Future versions are expected to support
higher rates as they become available. The FC-to-IP gateway will use whatever intersite network
bandwidth is set aside for the storage interconnect.
The IP tunnel that is created to support the FC-to-IP traffic also provides enhanced security of the
data because of the nature of IP tunnels. Compaq recommends designing the IP tunnels to carry
all of the intersite data traffic in case either—but not both—links fail.
For more information on the Extended DRM over IP configuration, refer to Compaq SANworks
Data Replication Manager over an Internet Protocol Link Application Note at
www.compaq.com/products/sanworks/drm/documentation.html
Target
Host V
Host W
Switch Y
Switch Z
Initiator
Host A
Host B
Switch E
Switch D
FC/IP
Bridge
FC/IP
Bridge
FC/IP
Bridge
FC/IP
Bridge
FC /IPFC /IP
o
o
o
o
FC /IPFC /IP
o
o
o
o
FC /IPFC /IP
o
o
o
o
FC /IPFC /IP
o
o
o
o
Figure 7: Extended DRM over IP configuration
Special Purpose DRM Solutions
The following sections provide different DRM configurations for special circumstances.
Bi-directional DRM Configuration
DRM supports active/active bi-directional solutions by using two sets of storage arrays, one set
for each direction. This allows both sites to be actively processing data and backing up each other
in the event one of the two sites fails. The Compaq Storage Solutions team created the
bi-directional DRM solution, which is a turnkey deployment of the basic bi-directional DRM for
Windows NT and Windows 2000. For more information on this solution, go to
www.compaq.com/products/storageworks/solutions/bd-drm/index.html