Sony AIT-SDX800, Руководство по техническим характеристикам продукции, Страница: 22 / 204

2.Specification
SONY AIT-3Ex drive SDX-800V series Ver.1.0 2-8
2.3.8. Error Rate
The un-correctable bit error rate is expected to be less than 1 in 10 to the 17th.
2.3.9. Retry Limits on Rewrites
AIT-3Ex
For Read-after-Write error correction, each group can be rewritten up to a maximum of 14 times giving 15 times of
the group.
AIT-3
For Read-after-Write error correction, each frame can be rewritten up to a maximum of 63 times giving 64 writes of
the frame.
2.3.10.
Definition of Failure
A failure is defined as any permanent manufacture of the drive that prevents the user from retrieving data from tape.
This includes failure to power up, failure to unload or eject a cassette, or failure to write and read data to and from the
tape, providing that both the drive and tape are being used within specification.
Faults are not considered failures when they are related to operator error mishandling and abuse, system-related
faults (cabling problems unsupported systems, operating software and so on) no trouble found, and transportation
damage.
2.3.11. Mean Time Between Failures
The Mean Time Between Failures (MTBF) for the SDX-800V is 400,000 power-on hours, assuming a duty cycle of
100%, where:
DutyCycle
=
Tape Motion Time
PowerOn Time
×
100
2.3.12.
Mean Time to Repair
The Mean Time To Repair (MTTR) of the SDX-800V is 30 minutes. Since at the field level the entire drive is
considered a Field Replaceable Unit (FRU) the time to replace the drive with a new one is less that 30 minutes.
2.3.13.
Component Life
The specified life of the SDX-800V is 5 years average.
2.3.14. Durability
The durability of the components in the SDX-800V will exceed the number of operations listed on the following table:
Start/Stop 400,000 times
Reposition 3,000,000 times
Thread/Unthread 100,000 times
Load/Eject 100,000 times