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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)
6 Functional Specifications