Reliability; Mean-Time-Between Failures; Mean-Time-To-Repair - Seagate STT8000A Product Manual

Chapter 2

Reliability

Mean-Time-Between Failures

Mean-Time-To-Repair

Page 12
The STT8000A is designed for maximum reliability and data integrity. The following
table summarizes the reliability specifications.
Feature
Non-recoverable error rate
Error recovery and control
Mean-Time-Between-Failures
(MTBF)
Mean-Time-To-Repair (MTTR)
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.
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 STT8000A 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.
Specification
15
< 1 in 10 bits
Reed-Solomon Error Correction Code techniques
Error monitoring and reporting (Error Log)
Media pre-written
Retry on read
Data randomization
More than 200,000 hours
Less than 0.33 hour
Specifications
STT8000A Product Manual