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1.15 Acoustics
This table shows the overall A-weighted acoustic sound power and sound
pressure levels for the drives. All measurements are generally consistent
with ISO document 7779. Acoustic measurements are taken under
essentially free-field conditions over a reflecting plane. The drive is
oriented with the top cover up for all tests.
Overall A-weighted Value Idle Seek
Sound power, typ (bels) 3.6 4.3
Sound power, max (bels)
4.0 4.4
Sound pressure, typ (dBA) 30 34
Sound pressure, max (dBA) 33 34
1.16 Reliability
Read error rates are measured with automatic retries and data correction
with ECC enabled and all flaws reallocated. The mean time between
failures (MTBF) is measured at nominal power at sea level and an
ambient temperature of 25°C.
Nonrecoverable read errors 1 per 10
13
bits transferred
Seek errors 1 per 10
7
physical seeks
Contact start/stops 30,000 cycles
MTBF 300,000 power-on hours
Service life 5 years
1.17 Agency listings
This drives are listed by agencies as follows:
• Recognized in accordance with UL478 and UL1950
• Certified to CSA C22.2 No. 220-M1986 and CSA C22.2 No. 950
• Certified to VDE 0805/05.90 and EN 60950/1.88 as tested by VDE
Medalist Pro 6450/6451 Product Manual, Rev. B 13