6 Functional Specifications

Restrictions for the MTBF Value

The following types of failures are excluded from the calculation of MTBF:

Failures arising from incorrect operating procedures

Cable failures, power supply failures, or other failures not caused by equipment

Failures caused by incorrect grounding procedures or by interference from external sources

Media failures, or any failures or degraded performance caused by use of faulty or damaged media

New failures that arise from continued use of a failed, misaligned, or damaged tape drive

Failures caused by incorrect maintenance procedures, and all failures that occur within the first 40 power-on hours of any maintenance activity that includes the modification, adjustment, or replacement of any tape drive assembly

Failures of new tape drives that occur within the first 40 power-on hours

Data Integrity

Conditions under which data integrity is maintained are as follows:

No recorded data will be lost as a result of power loss while the tape drive is reading data.

The tape drive will not record incorrect data to tape without posting an error condition.

The tape drive will not return incorrect data to the system without posting an error condition.

May 1994

EXB-8205 and EXB-8505

6-9

 

(Standard and XL)

 

Page 101
Image 101
Exabyte EXB-8505 8mm manual Data Integrity, Restrictions for the Mtbf Value