Quantum lto 4 用户指南

Chapter 5  Specifications

LTO Cartridge Specifications

LTO-4 Half-Height Tape Drive User’s Guide

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5

The mean time between failures (MTBF) for the internal drive is specified 

at 300,000 hours minimum. This specification includes all power-on and 

operational time but excludes maintenance periods. Operational time is 

assumed to be 100% of the power-on time. Operational time is the time 

the tape is loaded.
The MTBF for the tabletop drive power supply is 50,000 hours with the 

unit operated at full load and 25°C. 

5

The mean time to replace (MTTR) is the average time required by a 

qualified service technician to diagnose a defective drive and to install a 

replacement drive. The MTTR for LTO products is less than 0.5 hour (30 

minutes).
The Quantum LTO drives are field-replaceable units. If a problem occurs 

with a subassembly or component in the drive, you should replace the 

entire unit. Return the drive to the factory in its original packaging. 

Contact your distributor, dealer, your computer system company or your 

Quantum sales representative to arrange the return.

LTO Cartridge Specifications

5

 lists the basic environmental tolerances for LTO Ultrium 

cartridges. 

The MTBF rating does not represent any particular drive, but 

is derived from a large database of test samples. Actual rates 

may vary from unit to unit.