Quantum Audio Travan 40 Tape Drive STT3401A - Manual (Page 17)

Specifications Chapter 2
Seagate Travan 40 Product Manual Page 9
Shock (1/2 sine wave) 7Gs peak, 11 msec
(retries may be occur) 50 Gs peak, 11 msec
Acoustic level operational
(A-wt sum) 55 dBA maximum
(measured at operator
position, per ISO 7779) —
Shock (1/2 sine wave) 2.5 Gs peak, 11 msec 100 Gs peak, 11 msec
Reliability
The STT3401A is designed for maximum reliability and data integrity. The following
table summarizes the reliability specifications.
Feature Specification
Non-recoverable (hard) error rate < 1 in 10
17
bits
Correctable (soft) error rate < 1 in 10
7
bits
Error recovery and control
methods Write Equalization;
Data Randomization;
Retry on read;
Reed-Solomon Error Correction Code
Mean-Time-Between-Failures
(MTBF) More than 200,000 hours (20% duty rate)
Mean-Time-To-Repair (MTTR) Less than 0.5 hour
Mean-Time-Between-Failures
The Mean-Time-Between-Failures (MTBF) is greater than 250,000 hours. This
specification includes all power-on and operational time but excludes maintenance
periods. Operational time is assumed to be 20% of the power-on time. Operational
time is the time the tape is loaded.
Note: Seagate does not warrant the stated MTBF as representative of any
particular unit installed for customer use. The failure rate quoted here is
derived from a large database of test samples. Actual rates may vary from
unit to unit.
Mean-Time-To-Repair
The Mean-Time-To-Repair (MTTR) is the average time required by a qualified
service technician to diagnose a defective drive and install a replacement drive. The
MTTR for the drive is less than 0.5 hour (30 minutes).
Seagate Travan drives are field-replaceable. If a problem occurs with a subassembly
or component in the drive, the entire unit should be replaced. The faulty drive should