Seagate STT20000A, Руководство по эксплуатации продукта

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Chapter 2 Specifications
Page 12 STT20000A Product Manual
Reliability
The STT20000A is designed for maximum reliability and data integrity. The following
table summarizes the reliability specifications.
Feature Specification
Non-recoverable error rate < 1 in 10
15
bits
Error recovery and control Reed-Solomon Error Correction Code techniques
Error monitoring and reporting (Error Log)
Media pre-written
Retry on read
Data randomization
Mean-Time-Between-Failures
(MTBF) More than 250,000 hours
Mean-Time-To-Repair (MTTR) Less than 0.33 hour
Mean-Time-Between Failures
The Mean-Time-Between Failures (MTBF) is greater than 200,000 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 as qualified
service technician to diagnose a defective drive and install a replacement drive. The
MTTR for the drive is less than 0.33 hour (20 minutes).
The STT20000A is a field replaceable unit. If a problem occurs with a subassembly
or component in the drive, the entire unit should be replaced. The faulty drive should
be returned to the factory in its original packaging. Contact your distributor, dealer,
your computer system company, or your Seagate sales representative to arrange
the return.