Hitachi 9900 Series Hitachi Data Systems, HXRC Hitachi Extended Remote Copy, HYPERtape, Java

Hitachi Data Systems

HSN

Hierarchical Star Network. The technical term used to describe the combined internal networks (the C–HSN and the CM–HSN) of the Lightning 9900™ Series.

Hub

A common connection point for devices in a Fibre Channel network. A hub contains multiple ports. When a Fibre Channel packet of data arrives at one port, it is copied to the other ports so that all storage devices on a SAN can see all packets.

HXRC (Hitachi Extended Remote Copy)

This is Hitachi Data Systems® IBM XRC® compatible host-based software asynchro- nous remote copy. Using System Data Mover software it guarantees data integrity for dependent write applications.

HYPERtape

An enterprise backup/restore solution that leverages current customer investments. HYPERtape is a three-tier distributed system architecture with central administration and control that supports consolidated and distributed environments. HYPERtape can be used to back up data from any supported host to any system that supports the ftp protocol, including backup to disk for HSM integration or backup to local- or network-attached tape. Over 30 host platforms are covered and 70 library modules are supported. All popular RDBMS programs are supported including Oracle®, SAP® R/3, Informix®, Sybase®, DB2®, Adabas-D RDB, and Microsoft SQL Server®, Exchange®, and Windows NT/2000® registry.

IP

The IP (Internet Protocol) is the underlying protocol for routing packets on the Internet and other TCP/IP-based networks. IP is an internetwork protocol that provides a communication standard that works across different types of linked networks, for example Ethernet, FDDI, or ATM.

Java

Developed by Sun Microsystems®, Java is now a standard software language for developing plug-in applications.

Journaling

A journaling file system keeps track of all changes to files as transactions occur in real time. In the event of unexpected system problems, the file system can be restored to a consistent state by updating a prior copy of the file system for the changes made from the point in time that the copy was made.

LAN

Local area networks or LANs are networks of computers that are geographically close together; this usually means on the same campus. Most LANs are confined to a single building or group of buildings. However, one LAN can be connected to other LANs over any distance via telephone lines, high-speed fibre optic backbones, and radio waves. A system of LANs connected in this way is called a wide-area network (WAN).

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