User's Guide

Glossary
120 Quantum|ATL P3000 Series User’s Guide
HVD
High Voltage Differential or HVD (also called Differential
SCSI). The benefit of using HVD cabling is that it works well in
noisy areas and can reach up to 25 meters in distance. Quantum
DLT8000 and SDLT tape drives can be HVD or LVD devices.
I IEC
The International Electrotechnical Commission is based in
Geneva, Switzerland.
L Load port
The revolving assembly on a front door of ATL
enterprise libraries that incoporates a revolving drum and tape
cartidge bins (stationary or removeable) for loading and unloading
tape cartridges.
LTO
Linear Tape-Open is a tape drive specification backed by
IBM, Hewlett-Packard, and Seagate.
LVD
Low Voltage Differential or LVD is the newest type of SCSI
cabling, and LVD SCSI specifications can reach distances up to 12
meters. LVD SCSI cabling requires "Twist and Flat" ribbon cable
and an LVD/SE terminator or a "Twist and Flat" ribbon cable with
built-in LVD termination. All IBM LTO tape drives are LVD
devices. Quantum DLT8000 and SDLT tape drives can be LVD or
HVD devices.
M Mixed media
This term refers to the use of different tape drive
types within one tape library. ATL mixed media libraries may use
DLT and LTO tape drives simultaneously (LVD), as well as DLT
and SDLT tape drives HVD or LVD).
Mixed media gripper
A specialized gripper assembly which will
accept DLT, SDLT or LTO tape cartridges.
MSBF
Mean Swaps Before Failure
MTBF
Mean Time Between Failures
MTTR
Mean Time To Repair
Multi-unit
Refers to linking up to five P2000 and/or P3000 tape
libraries together using ATL’s Pass Through Mechanism.
NNEMA
National Electrical Manufacturers Association