Quantum Tape Drive LTO-3 - Manual (Page 60)

Chapter 5 Specifications
Mean Time Between Failures
46 LTO-3 Tape Drive User’s Guide
Table 10 Reliability
Mean Time Between Failures
5
The mean time between failures (MTBF) for the internal drive is specified
at 250,000 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 desktop drive power supply is 50,000 hours with the
unit operated at full load and 25°C.
Specification Description
Non-recoverable error
rate
Less than 1 in 10
17
bits
Error recovery and
control
• Error correction code techniques
(C1 and C2 ECC)
• Read-after-write (RAW)
• Error monitoring and reporting (error log)
• Retry on
Mean time between
failures (MTBF)
250,000 hours MTBF at 100% duty cycle:
power applied and tape moving continuously
(Desktop drive; 50,000 hours at full load and
25°C)
Cartridge load/
unload
300,000 cartridge load/unload cycles (no
thread)
Mean time to replace
(MTTR)
Less than 30 minutes
Note: 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.