Chapter 2

Specifications

Reliability

The STT8000A is designed for maximum reliability and data integrity. The following table summarizes the reliability specifications.

Feature

Specification

 

 

Non-recoverable error rate

< 1 in 1015 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

More than 200,000 hours

(MTBF)

 

 

 

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 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.

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STT8000A Product Manual

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Seagate STT8000A manual Reliability, Mean-Time-Between Failures, Mean-Time-To-Repair