User's Guide
Reliability Factors
Quantum|ATL PowerStor L500 Series Tape Library User’s Guide 81
Table 23 Acoustic 
Noise Emissions for 
German Declaration 
Law
Reliability Factors
5
The mean interval between failures of the library unit, less the tape 
drives, is:
• 185,000 Power-On Hours (POH) Mean Time Between Failures 
(MTBF),
or
• 1,000,000 Mean Load/Unload Cycles Between Failures 
(MCBF),
where a failure is charged against one or the other, but not both.
Quantum|ATL does not warrant that predicted mean interval 
between failures is representative of any particular unit installed 
for customer use. Actual figures vary from unit to unit.
Schallemissionswerte - VorläufigeWerteangaben nach ISO 9296 und ISO 7779/DIN EN27779:
Gerfdt
Schalleistungspegel Schalldruckpegel
LwAd B LpAm, dBA (Zuschauerpositionen)
Leerauf Betrieb 
(Streaming)
Betrieb 
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Leerauf Betrieb 
(Streaming)
Betrieb 
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TH6WF-ZZ 5.5 5.7 5.9 48 49 51
Aktuelle Werte für Ausrüstungsstufen sind über die Quantum|ATL Equipment Vertretungen 
erhältlich. 
1 B = 10 dBA










