Glossary
U24802-J-Z146-2-7600 RM400 C Models 189
Dokuschablonen Version 3.2 vom 25.10.93 © Siemens Nixdorf Informationssysteme AG 1993
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OD drive
An OD drive is a multifunction drive for WORM and ROD magneto-optical
media.
OD jukebox
An OD jukebox is a fully automated disk changer subsystem for WORM and
ROD magneto-optical media for the RM200. Disk access is controlled by
software.
Open Systems Interconnection (OSI)
An interface standard for communications between systems from different
vendors.
OSI Ethernet protocols
A reference model for networks, developed by ISO. It defines interface
standards for the hardware and software requirements of different vendors.
peripherals
All the devices connected to a system are known as peripherals. A distinction
is made between internal and external peripherals.
rewritable optical disc (ROD)
Like the CD-ROM, the rewritable optical disc is an optical storage medium (an
MO or magneto-optical disc). Unlike a CD-ROM, though, a ROD can be erased
and rewritten (repeatedly).
SCSI controller
A SCSI controller is used to connect peripherals such as hard disk drives,
cartridge tape drives and jukeboxes, OD drives and jukeboxes, and CD-ROM
drives to the system.
serial interface
An interface for serial data transmission. The bits are transmitted one at a time
down a single line (see also V.24 interface, X.21 interface).
start/stop mode
When a cartridge tape drive is operating in start/stop mode, the tape keeps
stopping in the course of read/write operations even though the head drum
keeps rotating. Compared to streaming mode this greatly increases the wear
on the head drum.
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