Installation Guide

Glossary 35
MIC
Memory In Cassette is a design innovation developed by Sony. Incorporating a
Flash memory IC inside the AIT media cassette allows the architecture to
capture various system and user-related statistics directly within the MIC
structure to enhance data reliability, error prediction and success performance.
mm
millimeter (0.03937 inches)
Off-line
When the drive is off-line, all commands that access the tape will report check
condition status. Generally operations that would cause tape motion, that is;
write, read, and space commands cannot be performed.
On-line
The drive is on-line when a tape is loaded in the drive and the load sequence
has finished. All commands can be executed, including those that set
configurations or run diagnostic tests.
RMA
Return Merchandise Authorization.
RMA number
An identifying number given to a customer who needs to return equipment for
repair, whether under warranty or not.
SCSI
Small Computer System Interface. An industry standard for connecting
peripheral devices and their controllers to a microprocessor. The SCSI
specification defines both hardware and software standards for communication
between a host computer and a peripheral.
SCSI bus
Signal path or line shared by the devices on the same SCSI channel.
Information is sent to all devices throughout the same bus; only the device to
which it is addressed will accept or respond to it.
SCSI ID
The octal representation of the unique address (0 to 15 for SCSI-2 Fast/Wide
buses) assigned to a SCSI device.
SDX
The series name of the media and hardware associated with the AIT format
incorporated in a 3.5 inch form factor.
AIT-70D/100D
An ADIC digital tape system that uses helical-scan technology to back up
networks or stand-alone units.
SDX-300C drive
A Sony AIT-1 drive used in the 100D. It is an enhanced Wide SCSI digital
helical-scan cassette tape subsystem.
SDX-500C drive
A Sony AIT-2 drive used in the 70D. It is an enhanced Wide Ultra SCSI digital
helical-scan cassette tape subsystem.
terminator
A resistor network that absorbs the signal energy at the ends of the SCSI bus in
order to prevent reflections of the signal. Reflections can lead to data errors
thereby causing SCSI devices to retransmit information. This can slow down
the bus speed. A terminator is required at both ends of a SCSI bus. A bus may
be terminated internally (on a device inside the host system) or externally on a
peripheral device.
Off-line
When the drive is off-line, all commands, which access the tape, will report
check condition status. Generally operations that cause tape motion, that is;
write, read, and space commands cannot be performed.