Features and Benefits of HSG80 ACS 8.6P Data Replication Manager

Features and Benefits of HSG80 ACS 8.6P Data Replication Manager 21
Constant Bit Rate (CBR)—Category of ATM service that supports a constant or guaranteed
data rate. CBR supports applications that need a highly predictable transmission rate.
Dual Switch/Single Site—A complete storage offering based on the DRM Dual Switch/Single
Site for the Windows NT solution that provides the highest level of data availability in single-site
environments. Based on switched fiber, this solution enables a customer to pinpoint and support a
critical application and to scale up as that application grows or new applications are added.
Disaster Tolerance (DT)—Provides the ability for rapid recovery of user data from a remote
location when a significant event or disaster occurs at the primary computing site.
Dense Wavelength Division Multiplexing (DWDM)—The ability to have multiple optical
signals share a single optical cable.
E1—The standard European carrier for transmission at 2.048 Mb/sec.
E3—The standard European carrier for transmission at 34.304 Mb/sec.
Fabric—A network of Fibre Channel switches and attached devices.
Fibre Channel (FC)—Technology for very high speed, switching-based serial transmissions.
Gigabit Interface Converter (GBIC)—The hardware devices inserted into the ports of the Fibre
Channel switch that hold the Fibre Channel cables. GBIC devices are available for short-range
applications (0.5 to 500 meters), long-range applications (up to 10 km), and very long distances
(up to 100 km).
Gigabit Link Module (GLM)—Permanently installed GLMs provide fiber-optic cable
transmission at distances of 0.5 to 500 meters, depending on the cable size and quality of its
installation.
Hop—One interswitch link.
ISL—Intersite link.
Initiator—For subsystems using the disaster-tolerant Data Replication Manager solution, the
initiator is the storage array that is the primary source of information. In the event of a system
outage, the database would be recovered from the target system.
Link—A connection between two adjacent Fibre Channel ports consisting of a transmit fiber and
a receiving fiber. An example is the connection between the Fibre Channel switch port and the
HSG80 controller.
MB/sec—Megabyte per second, sometimes shown as MBps.
Mb/sec—Megabit per second, sometimes shown as Mbps.
MMF—Multimode fiber, typically 50 micron, although 62.5 micron is also supported at reduced
distances.
OC3—The optical carrier that provides high-speed bandwidth at 155.3 Mb/sec.
OSG—Open Systems Gateway. OSG converts Fibre Channel to and from ATM.
Peak Cell Rate (PCR)—Peak cell rate is the maximum transmission speed of a virtual
connection and is a required parameter for the CBR service category.
Permanent Virtual Circuit (PVC)—Logical connection between two points that are manually
defined by the network administrator.